Parallel leaf veins Black and White Stock Photos & Images

A creative depiction of two dried out leaves with pinnately netted venation clearly visible. A unique image of two dead leaves. Photo ©️ COLIN HOSKINS. Stock Photo

RFS3PE48–A creative depiction of two dried out leaves with pinnately netted venation clearly visible. A unique image of two dead leaves. Photo ©️ COLIN HOSKINS.

In this frame there is endogenous leaf. This endogenous leaf showing its parallel veins and how endogens grow threw elongation internally, vintage lin Stock Vector

RFT61FPW–In this frame there is endogenous leaf. This endogenous leaf showing its parallel veins and how endogens grow threw elongation internally, vintage lin

The elements of botany for beginners and for schools . ed, and the mtted-veined. 127. In Netted-veined (also called Reticulated) leaves, the veins branchoff from the main rib or ribs, divide into finer and finer veinlels, and thebranches unite with each other to form meshes of network. That is, theyanastomose, as anatomists say of the veins and arteries of the body. TheQuince-leaf, in Pig. 112, shows this kind of veining in a leaf with a singlerib. The Maple, Basswood, Plane or Buttonwood (Pig. 74) show it inleaves of several ribs. 128. In parallel-veined leaves, the whole framework consists o Stock Photo

RM2AX564K–The elements of botany for beginners and for schools . ed, and the mtted-veined. 127. In Netted-veined (also called Reticulated) leaves, the veins branchoff from the main rib or ribs, divide into finer and finer veinlels, and thebranches unite with each other to form meshes of network. That is, theyanastomose, as anatomists say of the veins and arteries of the body. TheQuince-leaf, in Pig. 112, shows this kind of veining in a leaf with a singlerib. The Maple, Basswood, Plane or Buttonwood (Pig. 74) show it inleaves of several ribs. 128. In parallel-veined leaves, the whole framework consists o

. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. EXTERNAL CHARACTERISTICS 205 should be noted that parallel-veined leaves have net veins also; that is, the very small, invisible veins which branch off from the principal ones are of this character. Much of the beauty of the individual leaf is due to its venation. Sometimes the veins have all the delicacy and symmetry of beautiful lace work, as may be seen by hold- ing the leaf up to the light. The large veins send off smaller branches and these send off s Stock Photo

RMPG419M–. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. EXTERNAL CHARACTERISTICS 205 should be noted that parallel-veined leaves have net veins also; that is, the very small, invisible veins which branch off from the principal ones are of this character. Much of the beauty of the individual leaf is due to its venation. Sometimes the veins have all the delicacy and symmetry of beautiful lace work, as may be seen by hold- ing the leaf up to the light. The large veins send off smaller branches and these send off s

. Botany of the living plant. Botany. THE LEAF 6i the leaves of Dicotyledons. In Monocotyledons the main veins run parallel to one another, but still they are connected laterally by transverse branches. Thus the vascular system, of which the leading function is conduction, is very effectively placed for carrying out its purpose. For it is connected below with the conducting system of the stem, and it spieads throughout the blade, and reaches to its extreme tip and margin. A superficial examination gives only a very imperfect idea of the structure of this important part of the plant. Transverse Stock Photo

RMRDY9AD–. Botany of the living plant. Botany. THE LEAF 6i the leaves of Dicotyledons. In Monocotyledons the main veins run parallel to one another, but still they are connected laterally by transverse branches. Thus the vascular system, of which the leading function is conduction, is very effectively placed for carrying out its purpose. For it is connected below with the conducting system of the stem, and it spieads throughout the blade, and reaches to its extreme tip and margin. A superficial examination gives only a very imperfect idea of the structure of this important part of the plant. Transverse

. Elements of botany. Botany; Botany. LEAVES. 87 Notice that the leaf is traiversed lengthwise by a strong midrib and that many so-called veins run from this to the margin. Are these veins parallel ? Hold the leaf up toward the light and see how the main veins are connected by smaller veinlets. Examine with your glass the leaf as held to the light and make a careful sketch of portions of one or two veins and the intersecting veinlets. How is the course of the veins shown on the upper surface of the leaf ?. -^-^S^ Fig. 66.— Shapes of Margins of Leaves. a (1), finely serrate; (2), coarsely serra Stock Photo

RMPG4ABM–. Elements of botany. Botany; Botany. LEAVES. 87 Notice that the leaf is traiversed lengthwise by a strong midrib and that many so-called veins run from this to the margin. Are these veins parallel ? Hold the leaf up toward the light and see how the main veins are connected by smaller veinlets. Examine with your glass the leaf as held to the light and make a careful sketch of portions of one or two veins and the intersecting veinlets. How is the course of the veins shown on the upper surface of the leaf ?. -^-^S^ Fig. 66.— Shapes of Margins of Leaves. a (1), finely serrate; (2), coarsely serra

. Our native ferns and their allies [microform] : with synoptical descriptions of the American Pteridophyta north of Mexico . Ferns; Ferns; Pteridophyta; FougÃ¨res; ; . !|| 16 OUR NATIVE FERNS AND THEIR ALLIES. indusiiim covering a single sorus. The veins extend nearly at right angles to the midvein, are free, and usually forked. 46. Camptosorus.—The walking-leaf has oblong or linear iiidusiate sori, which are irregularly scattered and borne partly on veins parallel to the midvein, and partly on those that are oblique. Those near the midvein are single, those toward the margin are often approx Stock Photo

RMRJ26E7–. Our native ferns and their allies [microform] : with synoptical descriptions of the American Pteridophyta north of Mexico . Ferns; Ferns; Pteridophyta; FougÃ¨res; ; . !|| 16 OUR NATIVE FERNS AND THEIR ALLIES. indusiiim covering a single sorus. The veins extend nearly at right angles to the midvein, are free, and usually forked. 46. Camptosorus.—The walking-leaf has oblong or linear iiidusiate sori, which are irregularly scattered and borne partly on veins parallel to the midvein, and partly on those that are oblique. Those near the midvein are single, those toward the margin are often approx

. Fossil plants : for students of botany and geology . Paleobotany. 102 GENERA OE UNCERTAIN POSITION [GH. Kenaulti jjas figured a portion of a large leaf from Autun as Trichopitys Milleryensis which may belong to the closely allied genus Dicranophyllum; it is 12 cm. long and 3 mm. broad at the base; the narrow basal part of the lamina has three parallel veins and forks into two arms, each of which again branches into divergent linear segments. The leaf is larger and broader than the leaves of T. heteromorpha and agrees very closely with those of some species referred to Dicranophyllum: the fac Stock Photo

RMPG16K3–. Fossil plants : for students of botany and geology . Paleobotany. 102 GENERA OE UNCERTAIN POSITION [GH. Kenaulti jjas figured a portion of a large leaf from Autun as Trichopitys Milleryensis which may belong to the closely allied genus Dicranophyllum; it is 12 cm. long and 3 mm. broad at the base; the narrow basal part of the lamina has three parallel veins and forks into two arms, each of which again branches into divergent linear segments. The leaf is larger and broader than the leaves of T. heteromorpha and agrees very closely with those of some species referred to Dicranophyllum: the fac

. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. VENATION OR NBRVATVRE 185 The forms all fall within two principal classes, which, in general, characterize respectively the monocotyledons and the dicotyledons. The former bears its principal veins more or less parallel with one another, and these are numerous. Such leaves are called Parallel- veined (Fig. 526).. Venation or Nervature: Fig. 524, Pinnately veined leaf of Castanea: a, midrib; b, secondaries: o, tertiaries. 525. Reticulate leaflet of Pilocarpus: a, anastomosis of seco Stock Photo

RMRE0975–. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. VENATION OR NBRVATVRE 185 The forms all fall within two principal classes, which, in general, characterize respectively the monocotyledons and the dicotyledons. The former bears its principal veins more or less parallel with one another, and these are numerous. Such leaves are called Parallel- veined (Fig. 526).. Venation or Nervature: Fig. 524, Pinnately veined leaf of Castanea: a, midrib; b, secondaries: o, tertiaries. 525. Reticulate leaflet of Pilocarpus: a, anastomosis of seco

. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany; Botany. 46 HOW PLANTS GROW. 129. Parallel-veined leaves, we see, are of two sorts;— 1. those with the veins or nerves all running from tlie base of the leaf to the point (Fig. 85) ; and, 2. thoss where they mostly run from the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the Radiate-veined. 130. Feather-veined (al- so ca Stock Photo

RMPFYF8H–. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany; Botany. 46 HOW PLANTS GROW. 129. Parallel-veined leaves, we see, are of two sorts;— 1. those with the veins or nerves all running from tlie base of the leaf to the point (Fig. 85) ; and, 2. thoss where they mostly run from the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the Radiate-veined. 130. Feather-veined (al- so ca

RMRDYEGB–. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. EXTERNAL CHARACTERISTICS 20S should be noted that parallel-veined leaves have net veins also; that is, the very small, invisible veins which branch off from the principal ones are of this character. Much of the beauty of the individual leaf is due to its venation. Sometimes the veins have all the delicacy and symmetry of beautiful lace work, as may be seen by hold- ing the leaf up to the light. The large veins send off smaller branches and these send off s

. Fossil plants : for students of botany and geology . Paleobotany. XXXIII] PELOFRDEA 279 acuminate, and the lower part rather abruptly contracted and attached by a broad crescentic base; veins numerous, parallel, and occasionally forked. Fliche records the occurrence of a small ATtisia-]ike pith-cast and pieces of stem with leaf-scars ^4x3 mm.) in association with leaves of Pelourdea vogesiaca in. Fig. 484. Pelourdea vogesiaca. Reconstruction of a foliage-shoot. (After Wills.) Triassic strata in Lorraine. An imperfectly preserved specimen described by Fliche as Cordaianthus Minieri^ resembles Stock Photo

RMPG0D19–. Fossil plants : for students of botany and geology . Paleobotany. XXXIII] PELOFRDEA 279 acuminate, and the lower part rather abruptly contracted and attached by a broad crescentic base; veins numerous, parallel, and occasionally forked. Fliche records the occurrence of a small ATtisia-]ike pith-cast and pieces of stem with leaf-scars ^4x3 mm.) in association with leaves of Pelourdea vogesiaca in. Fig. 484. Pelourdea vogesiaca. Reconstruction of a foliage-shoot. (After Wills.) Triassic strata in Lorraine. An imperfectly preserved specimen described by Fliche as Cordaianthus Minieri^ resembles

RMRDJH1D–. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. EXTERNAL CHARACTERISTICS 205 should be noted that parallel-veined leaves have net veins also; that is, the very small, invisible veins which branch off from the principal ones are of this character. Much of the beauty of the individual leaf is due to its venation. Sometimes the veins have all the delicacy and symmetry of beautiful lace work, as may be seen by hold- ing the leaf up to the light. The large veins send off smaller branches and these send off s

. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of the veins may be free. 4 Stock Photo

RMPG3X8H–. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of the veins may be free. 4

. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. l6 OUR NATIVE FERNS AND THEIR ALLIES, ing a single sorus. The veins extend nearly at right angles to the midvein, are free, and usually forked. 46. Camptosorus.—The walking-leaf has oblong or linear indusiate sori, which are irregularly scattered and borne partly on veins parallel to the midvein, and partly on those that are oblique. Those near the midvein are single, those toward the margin are often approximate in pairs and often form crooked lines. Th Stock Photo

RMRJ1HKJ–. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. l6 OUR NATIVE FERNS AND THEIR ALLIES, ing a single sorus. The veins extend nearly at right angles to the midvein, are free, and usually forked. 46. Camptosorus.—The walking-leaf has oblong or linear indusiate sori, which are irregularly scattered and borne partly on veins parallel to the midvein, and partly on those that are oblique. Those near the midvein are single, those toward the margin are often approximate in pairs and often form crooked lines. Th

. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. VENATION OF LEAVES. 157. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of Stock Photo

RMPG3X94–. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. VENATION OF LEAVES. 157. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of

RMRE2A7H–. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany; Botany. 46 HOW PLANTS GROW. 129. Parallel-veined leaves, we see, are of two sorts;— 1. those with the veins or nerves all running from the base of the leaf to the point (Fig. 85) ; and, 2. those .where they mostly run from the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the l^adiate-veined. 130. Feather-veined (al- so c

. Foundations of botany. Botany; Botany. 136 FOUNDATIONS OF BOTANY. Fig. lOO. — Parallel- TeinedLeafofSol. omon's Seal. bristle-shaped objects at the base of the leaf, as in the apple leaf (Fig. 98), sometimes as leaf-like bodies, for example in the pansy (Fig. 99), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig. 103). 145. Parallel-Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly parallel, lengthwise through t Stock Photo

RMPG422W–. Foundations of botany. Botany; Botany. 136 FOUNDATIONS OF BOTANY. Fig. lOO. — Parallel- TeinedLeafofSol. omon's Seal. bristle-shaped objects at the base of the leaf, as in the apple leaf (Fig. 98), sometimes as leaf-like bodies, for example in the pansy (Fig. 99), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig. 103). 145. Parallel-Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly parallel, lengthwise through t

. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. THE LEAF 77 leaf stalk, -wlien there is one, in the form of parallel threads or bundles of fibers; and in the blade these spread out in a horizontal direction, to form the ribs and veins of the leaf. The stout main branches of the framework are called the ribs. When there is only one, as in Fig. 01, or a middle one decidedly larger than the rest, it is called the midrib. The smaller divisions are termed veins Stock Photo

RMRDX21B–. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. THE LEAF 77 leaf stalk, -wlien there is one, in the form of parallel threads or bundles of fibers; and in the blade these spread out in a horizontal direction, to form the ribs and veins of the leaf. The stout main branches of the framework are called the ribs. When there is only one, as in Fig. 01, or a middle one decidedly larger than the rest, it is called the midrib. The smaller divisions are termed veins

. Foundations of botany. Botany; Botany. Fig. lOO. — Parallel- TeinedLeafofSol. omon's Seal. bristle-shaped objects at the base of the leaf, as in the apple leaf (Fig. 98), sometimes as leaf-like bodies, for example in the pansy (Fig. 99), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig. 103). 145. Parallel-Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly parallel, lengthwise through the blade, as shown in Fig. Stock Photo

RMPG422M–. Foundations of botany. Botany; Botany. Fig. lOO. — Parallel- TeinedLeafofSol. omon's Seal. bristle-shaped objects at the base of the leaf, as in the apple leaf (Fig. 98), sometimes as leaf-like bodies, for example in the pansy (Fig. 99), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig. 103). 145. Parallel-Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly parallel, lengthwise through the blade, as shown in Fig.

RMRDHHYP–. Elements of botany. Botany; Botany. LEAVES. 87 Notice that the leaf is traiversed lengthwise by a strong midrib and that many so-called veins run from this to the margin. Are these veins parallel ? Hold the leaf up toward the light and see how the main veins are connected by smaller veinlets. Examine with your glass the leaf as held to the light and make a careful sketch of portions of one or two veins and the intersecting veinlets. How is the course of the veins shown on the upper surface of the leaf ?. -^-^S^ Fig. 66.— Shapes of Margins of Leaves. a (1), finely serrate; (2), coarsely serra

. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately ^^ â parallel, passing usually from the base to the apex (Fig. 283). The flower in the Stock Photo

RMPG3RMF–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately ^^ â parallel, passing usually from the base to the apex (Fig. 283). The flower in the

. Botany all the year round; a practical text-book for schools. Botany. 54. — Paral lel-veined leaf of lily of the valley {after Gray).. 38. Pinnate and Palmate Vein- ing. — Next, compare a leaf of the canna, or of any of our common garden arums, with one of the elm, peach, cherry, etc., or with a leaflet of the rose or clover. Hold both up to the light and observe carefully the veins and reticulations. What resemblance do you notice between the two.? What difference.? Which is parallel veined and which is net veined.' Make a drawing of each, and compare with the first two. Notice that 55.— Pa Stock Photo

RMRE0T91–. Botany all the year round; a practical text-book for schools. Botany. 54. — Paral lel-veined leaf of lily of the valley {after Gray).. 38. Pinnate and Palmate Vein- ing. — Next, compare a leaf of the canna, or of any of our common garden arums, with one of the elm, peach, cherry, etc., or with a leaflet of the rose or clover. Hold both up to the light and observe carefully the veins and reticulations. What resemblance do you notice between the two.? What difference.? Which is parallel veined and which is net veined.' Make a drawing of each, and compare with the first two. Notice that 55.— Pa

RMPG3RMM–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 170 SYSTEMATIC BOTANY.. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately ^^ â parallel, passing usually from the base to the apex (Fig.

. Nature and development of plants. Botany. Fig. 3. Forms of leaves: A, leaf of white birch with netted veins—p, petiole; b, blade. B, leaf of Solomon's seal with parallel venation and blade clasping stem without petiole. leaves bring the plant into harmony with its surroundings and give to it a subtle individuality owing to the perfection of their arrangements, structures and forms for the work in hand. The 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not per Stock Photo

RMRE0PXT–. Nature and development of plants. Botany. Fig. 3. Forms of leaves: A, leaf of white birch with netted veins—p, petiole; b, blade. B, leaf of Solomon's seal with parallel venation and blade clasping stem without petiole. leaves bring the plant into harmony with its surroundings and give to it a subtle individuality owing to the perfection of their arrangements, structures and forms for the work in hand. The 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not per

RMRDJEAT–. Botany for young people and common schools : how plants grow, a simple introduction to structural botany : with a popular flora, or an arrangement and description of common plants both wild and cultivated : illustrated by 500 wood engravings . Botany. 46 HOW PLANTS GROW. 129. Parallel-veined leaves, we see, are of two sorts; — 1. those with the veins or nerves all running from the base of the leaf to the point (Fig. 85) ; and, 2. thosQ where they mostly run from the midiib to the margin, as in Fig. 86. Netted-veined leaves Ukewise are of two sorts, the Feather^eined and the Radiate-veined. 1

. Text-book of botany, morphological and physiological. Botany. MONOCOTYLEDONS. 6*5 in large numbers to the margin of the leaf. These parallel transverse nerves are sometimes united into a lattice-like network by short straight anastomosings (as in Ah'sma, Cos/us, and Ouvirandra, the mesophyll being absent within the meshes of the latter). It is only rarely (as in some Aroidese) that projecting lateral veins are given off from the mid-rib, a finer reticulated venation springing from them. The Flower of Monocotyledons usually consists of five alternating isomerous whorls; viz. an outer and an i Stock Photo

RMRPXFHX–. Text-book of botany, morphological and physiological. Botany. MONOCOTYLEDONS. 6*5 in large numbers to the margin of the leaf. These parallel transverse nerves are sometimes united into a lattice-like network by short straight anastomosings (as in Ah'sma, Cos/us, and Ouvirandra, the mesophyll being absent within the meshes of the latter). It is only rarely (as in some Aroidese) that projecting lateral veins are given off from the mid-rib, a finer reticulated venation springing from them. The Flower of Monocotyledons usually consists of five alternating isomerous whorls; viz. an outer and an i

RMRDBCFB–. Fossil plants : for students of botany and geology . Paleobotany. 102 GENERA OE UNCERTAIN POSITION [GH. Kenaulti jjas figured a portion of a large leaf from Autun as Trichopitys Milleryensis which may belong to the closely allied genus Dicranophyllum; it is 12 cm. long and 3 mm. broad at the base; the narrow basal part of the lamina has three parallel veins and forks into two arms, each of which again branches into divergent linear segments. The leaf is larger and broader than the leaves of T. heteromorpha and agrees very closely with those of some species referred to Dicranophyllum: the fac

RMRE0JH9–. Botany for young people and common schools : how plants grow : a simple introduction to structural botany : with a popular flora, or, an arrangement and description of common plants, both wild and cultivated . Botany; Botany. 46 HOW PLANTS GROW. 129. Parallel-veined leaves, we see, are of two sorts; — 1. those with the veins or nerves all running from the base of the leaf to the point (Fig. 85) ; and, 2. those where they mostly run from the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the Radiate^eined. 130. Feather-veined (al- s

. How plants grow [microform] : a simple introduction to structural botany : with a popular flora, or an arrangement and description of common plants, both wild and cultivated : illustrated by 500 wood engravings. Botany; Botanique. 46 HOW PLANTS OnOW. 129. Parallel-veined leaves, we see, are of two sorts; — 1. those with the veins or nerves all running from the base of the leaf to the jwint (Fig. 85) ; and, 2. those where they mostly run fi-om the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the Radiate-veined, 130. Feather-veined Stock Photo

RMRJ1DA9–. How plants grow [microform] : a simple introduction to structural botany : with a popular flora, or an arrangement and description of common plants, both wild and cultivated : illustrated by 500 wood engravings. Botany; Botanique. 46 HOW PLANTS OnOW. 129. Parallel-veined leaves, we see, are of two sorts; — 1. those with the veins or nerves all running from the base of the leaf to the jwint (Fig. 85) ; and, 2. those where they mostly run fi-om the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the Radiate-veined, 130. Feather-veined

. A guide to the trees [microform]. Trees; Botany; Arbres; Botanique. ILLUSTRATED TERMS. rw i â I i when it is longer and more prominent than the others. (Fig. 4,) The numerous sub-divisions of the framework, Veinlets, and the finest of these Veinulets. In regard to their venation, leaves are divided into (i) those that are Netted-Veined and (2) those that are Parallel- Veined. This feature is invariably in accord with the shape. FIG. 2. FIG. 3. FIG. S- I and character of the leaf and should therefore be most care- fully observed. I. Netted-Veined Leaves are those in which the veins branch off Stock Photo

RMRJ6H0M–. A guide to the trees [microform]. Trees; Botany; Arbres; Botanique. ILLUSTRATED TERMS. rw i â I i when it is longer and more prominent than the others. (Fig. 4,) The numerous sub-divisions of the framework, Veinlets, and the finest of these Veinulets. In regard to their venation, leaves are divided into (i) those that are Netted-Veined and (2) those that are Parallel- Veined. This feature is invariably in accord with the shape. FIG. 2. FIG. 3. FIG. S- I and character of the leaf and should therefore be most care- fully observed. I. Netted-Veined Leaves are those in which the veins branch off

RMRDX20N–. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. 61. Reticulated veration of a AVillow leaf.—Ettings- HAUSEN. 02. Parallel venation of the Lily of the Valley leaf. — Ettinoshaosen. kind of veiniTig in a leaf with a single rib. The IIaple, Basswood, and Plane or P>tittonwood show it in leaves of several ribs. 123. Tn parallel-veined leaves, the whole framework consists of slender ribs or veins, which run parallel with each other, or nearly so, from the b

RMRDAB66–. Botany for young people and common schools. How plants grow, a simple introduction to structural botany. With a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany; Botany. 46 HOW PLANTS GROW. 129. Parallel-veined leaves, we see, are of two sorts;— 1. those with the veins or nerves all running from tlie base of the leaf to the point (Fig. 85) ; and, 2. thoss where they mostly run from the midrib to the margin, as in Fig. 86. Netted-veined leaves likewise are of two sorts, the Feather-veined and the Radiate-veined. 130. Feather-veined (al- so ca

. Textbook of botany. Botany. iS8 TEXTBOOK OF BOTANY the sheath, there is a short, thin outgrowth. The blade is long, drooping at the tip, narrow in proportion to its length, and has a long, slender point. Its edge bears many very fine teeth. On its upper surface a shallow groove runs lengthwise above the midrib. The arrangement of the veins looks quite unlike that in the bean leaf. Many veins start from the base and run nearly parallel with one another to the upper end of the leaf. The middle vein (midrib) is much the largest. The midrib and the veins that run parallel with it do not seem to Stock Photo

RMRDWAG0–. Textbook of botany. Botany. iS8 TEXTBOOK OF BOTANY the sheath, there is a short, thin outgrowth. The blade is long, drooping at the tip, narrow in proportion to its length, and has a long, slender point. Its edge bears many very fine teeth. On its upper surface a shallow groove runs lengthwise above the midrib. The arrangement of the veins looks quite unlike that in the bean leaf. Many veins start from the base and run nearly parallel with one another to the upper end of the leaf. The middle vein (midrib) is much the largest. The midrib and the veins that run parallel with it do not seem to

. A guide to the trees [microform]. Trees; Botany; Arbres; Botanique. ILLUSTRATED TERMS, is: apex of the leaf, all branch from the sides of the midrib. (Fig, 12,) Palmately-Veined Leaves have several veins of almost equal size which branch from the same point at the base of the blade and spread out at different angles towards the margin. (Fig. 26.) 2. Parallel-Veined Leaves are those in which the main veins run side by side without branching or running together, unless it is by a few almost imperceptible cross-veinlets. (Fig. 10.) It is according therefore to the structure of their framework t Stock Photo

RMRJ6H0B–. A guide to the trees [microform]. Trees; Botany; Arbres; Botanique. ILLUSTRATED TERMS, is: apex of the leaf, all branch from the sides of the midrib. (Fig, 12,) Palmately-Veined Leaves have several veins of almost equal size which branch from the same point at the base of the blade and spread out at different angles towards the margin. (Fig. 26.) 2. Parallel-Veined Leaves are those in which the main veins run side by side without branching or running together, unless it is by a few almost imperceptible cross-veinlets. (Fig. 10.) It is according therefore to the structure of their framework t

. Introduction to botany. Botany. 70 INTRODUCTION TO BOTANY leaves with the vems running somewhat parallel to each other. Sometimes, as in the canna (fig. 50), the veins run both ways from a midrib, but oftener, as in corn and the other grasses, the veins run from the base to the tip of the leaf. This latter system of veining is most commonly found in long, narrow, leaves. Most dicotyledons have net-veined leaves. These are of two types: those like the leaf of the willow, oak, and. Fig. 50. Parallel-veined leaf of canna, veins running from midrib to margin. Please note that these images are ex Stock Photo

RMRE3AJJ–. Introduction to botany. Botany. 70 INTRODUCTION TO BOTANY leaves with the vems running somewhat parallel to each other. Sometimes, as in the canna (fig. 50), the veins run both ways from a midrib, but oftener, as in corn and the other grasses, the veins run from the base to the tip of the leaf. This latter system of veining is most commonly found in long, narrow, leaves. Most dicotyledons have net-veined leaves. These are of two types: those like the leaf of the willow, oak, and. Fig. 50. Parallel-veined leaf of canna, veins running from midrib to margin. Please note that these images are ex

. Essentials of biology presented in problems. Biology. 120 LEAVES AND THEIR WORK number of vdns. These veins usually present a netted appear- ance in the leaf of a dicotyledon, but nm more or less parallel to one another in the blade of a monocotyledonous leaf. At the base of the leaf may be found a pair of outgrowths from the petiole called stipules. By means of these stipules in the rose leaf, for example, we are able to know that the leaf is compound, that is, each of the little leaflike parts is in reality part of a leaf blade that is so deeply indented that the blade is cut away to the l Stock Photo

RMRE00XP–. Essentials of biology presented in problems. Biology. 120 LEAVES AND THEIR WORK number of vdns. These veins usually present a netted appear- ance in the leaf of a dicotyledon, but nm more or less parallel to one another in the blade of a monocotyledonous leaf. At the base of the leaf may be found a pair of outgrowths from the petiole called stipules. By means of these stipules in the rose leaf, for example, we are able to know that the leaf is compound, that is, each of the little leaflike parts is in reality part of a leaf blade that is so deeply indented that the blade is cut away to the l

. Elements of botany. Botany; Botany. LEAVES. 87 Notice that the leaf is traversed lengthwise by a strong midrib and that many so-called veins run from this to the margin. Are these veins parallel ? Hold the leaf up toward the light and see how the main veins are connected by smaller veinlets. Examine with your glass the leaf as held to the light and make a careful sketch of portions of one or two veins and the intersecting veinlets. How is the course of the veins shown on the upper surface of the leaf ?. Fig. 66. — S b iUJ e s of Margins of Leaves. a (1), finely serrate ; (2'), coarsely serra Stock Photo

RMRDWRNJ–. Elements of botany. Botany; Botany. LEAVES. 87 Notice that the leaf is traversed lengthwise by a strong midrib and that many so-called veins run from this to the margin. Are these veins parallel ? Hold the leaf up toward the light and see how the main veins are connected by smaller veinlets. Examine with your glass the leaf as held to the light and make a careful sketch of portions of one or two veins and the intersecting veinlets. How is the course of the veins shown on the upper surface of the leaf ?. Fig. 66. — S b iUJ e s of Margins of Leaves. a (1), finely serrate ; (2'), coarsely serra

. Essentials of botany. Botany; Botany. T Fig. 64. Leaf of Pansy, with Leaf- like Stipules. sometimes as leaf like bodies, for ex- ample in the pansy (Fig. 64), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig: 68). 119. Parallel- Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly par- allel, lengthwise thi'ough the blade, as shown in Fig. 65, or with parallel 1 Unless the elin twigs used in the previous ^'.<'- Stock Photo

RMRDWGK9–. Essentials of botany. Botany; Botany. T Fig. 64. Leaf of Pansy, with Leaf- like Stipules. sometimes as leaf like bodies, for ex- ample in the pansy (Fig. 64), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig: 68). 119. Parallel- Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly par- allel, lengthwise thi'ough the blade, as shown in Fig. 65, or with parallel 1 Unless the elin twigs used in the previous ^'.<'-

. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. 54 ACADEMIC BOTANY. 161) and the Canna (Fig. 63, C). 90. Endogenous Growth. —The embryo governs the leaf and stem (32). In Endogens the embryo has one cotyledon, which sheathes the plumule. The plants therefore have alternate, sheathing, parallel - veined leaves; the veins run from base to tip, as in the Grasses (Fig. 51), or from midrib to margin, as in the Banana (Fig. 60). Sometimes the leaves are net-veined, as in the Yam (Fig. 89) and Smilax (Fig. 241); but the net-ve Stock Photo

RMRDHCMT–. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. 54 ACADEMIC BOTANY. 161) and the Canna (Fig. 63, C). 90. Endogenous Growth. —The embryo governs the leaf and stem (32). In Endogens the embryo has one cotyledon, which sheathes the plumule. The plants therefore have alternate, sheathing, parallel - veined leaves; the veins run from base to tip, as in the Grasses (Fig. 51), or from midrib to margin, as in the Banana (Fig. 60). Sometimes the leaves are net-veined, as in the Yam (Fig. 89) and Smilax (Fig. 241); but the net-ve

. Introduction to botany. Botany. w Fig. 141. A, clusters of uredospores of wheat rust breaking through the epiderinis between the parallel veins of a leaf of wheat. B, a cross section through one of the spore clusters of A, showing the uredospores highly magnified. to other leaves by the wind, put forth enter the leaf through the stomata.. Fig. 142. Photomicrograph of a cross section of a grass leaf parasitized by Puccinia. The mycelium of the fungus extends through the leaf and bears clus- ters of teleutospores at the upper surface. minate and produce filaments, each spores (Fig. 143) which Stock Photo

RMRDRD2B–. Introduction to botany. Botany. w Fig. 141. A, clusters of uredospores of wheat rust breaking through the epiderinis between the parallel veins of a leaf of wheat. B, a cross section through one of the spore clusters of A, showing the uredospores highly magnified. to other leaves by the wind, put forth enter the leaf through the stomata.. Fig. 142. Photomicrograph of a cross section of a grass leaf parasitized by Puccinia. The mycelium of the fungus extends through the leaf and bears clus- ters of teleutospores at the upper surface. minate and produce filaments, each spores (Fig. 143) which

RMRDJ2TT–. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of the veins may be free. 4

. Leaves and flowers : or, Object lessons in botany with a flora : prepared for beginners in academies and public schools . Botany. u OBJECT LESSONS IN BOTANY. With palmate venation. Maple leaves are very familiar ex- amples of the same. 11. Our next figure (5) represents the leaf of the Tulip. How very different is its venation! How smooth, even, and polislied its surface! The veins all run side by side, from base to apex, in graceful and regular curves. They are so nearly parallel, that tbis kind of venation is called tbe , parallel venation. Look at the grass leaves, the /f/4 u Corn leaves, Stock Photo

RMRDW9G8–. Leaves and flowers : or, Object lessons in botany with a flora : prepared for beginners in academies and public schools . Botany. u OBJECT LESSONS IN BOTANY. With palmate venation. Maple leaves are very familiar ex- amples of the same. 11. Our next figure (5) represents the leaf of the Tulip. How very different is its venation! How smooth, even, and polislied its surface! The veins all run side by side, from base to apex, in graceful and regular curves. They are so nearly parallel, that tbis kind of venation is called tbe , parallel venation. Look at the grass leaves, the /f/4 u Corn leaves,

RMRDFDNF–. Fossil plants : for students of botany and geology . Paleobotany. XXXIII] PELOFRDEA 279 acuminate, and the lower part rather abruptly contracted and attached by a broad crescentic base; veins numerous, parallel, and occasionally forked. Fliche records the occurrence of a small ATtisia-]ike pith-cast and pieces of stem with leaf-scars ^4x3 mm.) in association with leaves of Pelourdea vogesiaca in. Fig. 484. Pelourdea vogesiaca. Reconstruction of a foliage-shoot. (After Wills.) Triassic strata in Lorraine. An imperfectly preserved specimen described by Fliche as Cordaianthus Minieri^ resembles

RMRDJ2W4–. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. VENATION OF LEAVES. 157. 120 438. Parallel venation is of two principal kinds : (1) that in wliich. large nerves run in long curves from the base to the apex of the leaf; (2) that in which smaller nerves run generally at right an- gles from a main nerve (or midrib) to the edges of the leaf. In both these kinds of parallel venation the veins are more or less con- nected bj' means of inconspicuous cross-veinlets and b^- the anasto- mosing extremities, but some of

. A manual of botany. Botany. Fig. 108. Leaf of the Cherry with lamina, petiole, and stipules. The lamina has serrate margins, and a large central vein or midrib is seen to proceed from the petiole to bhe apex of the leaf, and to give oil from its sides the other veins {pinnalely veined). Fig. 109. Ribbed leaf of Cinnamon with entire margins. Fig. 110. Leaf of the Melon with dentate margins. The venation is said to be radiated or palmately veined. Fig. 111. a. Parallel venation of a grass ; this variety of venation is commonly called straight-veined, h. A. variety of parallel venation sometime Stock Photo

RMRE1KX6–. A manual of botany. Botany. Fig. 108. Leaf of the Cherry with lamina, petiole, and stipules. The lamina has serrate margins, and a large central vein or midrib is seen to proceed from the petiole to bhe apex of the leaf, and to give oil from its sides the other veins {pinnalely veined). Fig. 109. Ribbed leaf of Cinnamon with entire margins. Fig. 110. Leaf of the Melon with dentate margins. The venation is said to be radiated or palmately veined. Fig. 111. a. Parallel venation of a grass ; this variety of venation is commonly called straight-veined, h. A. variety of parallel venation sometime

RMRDRD2E–. Introduction to botany. Botany. w Fig. 141. A, clusters of uredospores of wheat rust breaking through the epiderinis between the parallel veins of a leaf of wheat. B, a cross section through one of the spore clusters of A, showing the uredospores highly magnified. to other leaves by the wind, put forth enter the leaf through the stomata.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Stevens, William Chase, 1861-. Bosto

. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. FORMS OF SIMPLE LEA.VES. 85 maimer, as in Cinnamon and Melastoma (fig. 173). There is occa- sionally an obscure rib running close to the edge of the leaf, and called intramarginal, as in the Myrtle. 2. Divergent. Ribs diverging or proceeding in a radiating manner (iig. 159). This is called radiating venation, and is seen in Sycamore, Vine, Geranium, Castor-oil plant (flg. 161). B. ^—Parallel Venation. —The term parallel is not strictly applicable, for the veins often p Stock Photo

RMRDJ1FM–. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. FORMS OF SIMPLE LEA.VES. 85 maimer, as in Cinnamon and Melastoma (fig. 173). There is occa- sionally an obscure rib running close to the edge of the leaf, and called intramarginal, as in the Myrtle. 2. Divergent. Ribs diverging or proceeding in a radiating manner (iig. 159). This is called radiating venation, and is seen in Sycamore, Vine, Geranium, Castor-oil plant (flg. 161). B. ^—Parallel Venation. —The term parallel is not strictly applicable, for the veins often p

. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. DISTRIBUTION OF WATER THROUGHOUT LEAF "5 with the mid-rid, but some run an independent course from base to apex, as seen in grass leaves. These leaves are called parallel-veined (Fig, 58, B). In the netted-veined sort the veins divide and subdivide until the meshes are extremely small— in some leaves approximately 0.2 mm. in diameter, and the ultimate branches end free in the mesophyll. In the parallel- veined type the main veins running from base to apex are Stock Photo

RMRE2EAR–. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. DISTRIBUTION OF WATER THROUGHOUT LEAF "5 with the mid-rid, but some run an independent course from base to apex, as seen in grass leaves. These leaves are called parallel-veined (Fig, 58, B). In the netted-veined sort the veins divide and subdivide until the meshes are extremely small— in some leaves approximately 0.2 mm. in diameter, and the ultimate branches end free in the mesophyll. In the parallel- veined type the main veins running from base to apex are

$. A manual of botany. Botany. Fig. 119.. Fig. 116. Leaf showing the variety of parallel venation usually called straight-veined ; the margins are entire. Fig. 117. Straight-veined variety of parallel venation, as seen in the leaf of the Fan Palm {Ghamm- Ttyps). Fig. 118. Ourve-veined variety of parallel venation, as seen in the Banana. Fig. 119 Forked venation of a Feni leaf; the margins are crenate. which they are connected by small veins, as in the Dead-nettle {fig. 114) and Lilac. B. Radiated or Palmately vevned.^-'Shis name is applied to a leaf which possesses two or more strong veins that Stock Photo$

RMRE1KWT–. A manual of botany. Botany. Fig. 119.. Fig. 116. Leaf showing the variety of parallel venation usually called straight-veined ; the margins are entire. Fig. 117. Straight-veined variety of parallel venation, as seen in the leaf of the Fan Palm {Ghamm- Ttyps). Fig. 118. Ourve-veined variety of parallel venation, as seen in the Banana. Fig. 119 Forked venation of a Feni leaf; the margins are crenate. which they are connected by small veins, as in the Dead-nettle {fig. 114) and Lilac. B. Radiated or Palmately vevned.^-'Shis name is applied to a leaf which possesses two or more strong veins that

. Introduction to botany. Botany. Fig. 50. Parallel-veined leaf of canna, veins running from midrib to margin. Fig. 51. An apple t-wig in the autumn Alternate arrangement of leaves peach, with the smaller veins running both ways from a mid- rib; and those like the geranium, hollyhock, and cucumber, with the veins radiating from the base of the leaf, like the sticks of a fan (fig. 49). Net-veined leaves with feather- like veining frequently have a length several times as great as their width, while those with fan-like veiuing are often round- ish in their general outline. Whatever the shape of Stock Photo

RMRE3AJF–. Introduction to botany. Botany. Fig. 50. Parallel-veined leaf of canna, veins running from midrib to margin. Fig. 51. An apple t-wig in the autumn Alternate arrangement of leaves peach, with the smaller veins running both ways from a mid- rib; and those like the geranium, hollyhock, and cucumber, with the veins radiating from the base of the leaf, like the sticks of a fan (fig. 49). Net-veined leaves with feather- like veining frequently have a length several times as great as their width, while those with fan-like veiuing are often round- ish in their general outline. Whatever the shape of

. A guide to the wild flowers [microform]. Wild flowers; Botany; Fleurs sauvages; Botanique. 10 A CHAP IKK. lU STUDY. off from the midrib and branch again into veiiilets that run to- gether and form a network, or mesh. (1*"ig. 30,) Netted- veined leaves are said to be Feather-Veined w hen the sec- ondary veins all start from the sides of the midrib, running from the base to the apex of the leaf. (Fid. 31.) They are called Palmately-Veined when several veins of equal size start from the same point at the base of the leaf and spread out towards the margin. Parallel-Veined leaves are those i Stock Photo

RMRJ5C7E–. A guide to the wild flowers [microform]. Wild flowers; Botany; Fleurs sauvages; Botanique. 10 A CHAP IKK. lU STUDY. off from the midrib and branch again into veiiilets that run to- gether and form a network, or mesh. (1*"ig. 30,) Netted- veined leaves are said to be Feather-Veined w hen the sec- ondary veins all start from the sides of the midrib, running from the base to the apex of the leaf. (Fid. 31.) They are called Palmately-Veined when several veins of equal size start from the same point at the base of the leaf and spread out towards the margin. Parallel-Veined leaves are those i

$. Elementary botany . Botany. BUDS 23 Vernation is the term applied to denote the manner in which each single leaf is packed in the bud. Each leaf may be flat or plane (figs. 29, 32). In some cases the leaf is^/i&^ in various ways along the courses of the chief veins. The two halves of the lamina maybe simplyy»/(/i?^together along the mid-rib, like two pages of a book (figs. 30, 33); or there may be a number of folds (fig- 34) along several of the large veins, especially in leaves with parallel venation {e.g. many grasses) and with palmate venation, so that the young leaf reminds us of a c Stock Photo$

RMRDJ1T7–. Elementary botany . Botany. BUDS 23 Vernation is the term applied to denote the manner in which each single leaf is packed in the bud. Each leaf may be flat or plane (figs. 29, 32). In some cases the leaf is^/i&^ in various ways along the courses of the chief veins. The two halves of the lamina maybe simplyy»/(/i?^together along the mid-rib, like two pages of a book (figs. 30, 33); or there may be a number of folds (fig- 34) along several of the large veins, especially in leaves with parallel venation {e.g. many grasses) and with palmate venation, so that the young leaf reminds us of a c

. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. VENATION. 89 LESSON XVII. VENATION—LEAF-FOEMS—SIMPLE LEAVES. 189. 190. Venation. 191. Leaf-forms. 192. Leaf-base. 193. Leaf- apex. 194. Leaf-incisions. 195. Leaf-margins. 196. Simple leaves. 189. Venation is of three modes, as we hnov/,-r-Forked, Parallel, Netted. Forked veins branch by forking simply, and do not reunite. Parallel veins run parallel to one another, or nearly so; they do not subdivide nor form meshes, except by very short venules. Netted veins (reticulate) Stock Photo

RMRDHC5Y–. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. VENATION. 89 LESSON XVII. VENATION—LEAF-FOEMS—SIMPLE LEAVES. 189. 190. Venation. 191. Leaf-forms. 192. Leaf-base. 193. Leaf- apex. 194. Leaf-incisions. 195. Leaf-margins. 196. Simple leaves. 189. Venation is of three modes, as we hnov/,-r-Forked, Parallel, Netted. Forked veins branch by forking simply, and do not reunite. Parallel veins run parallel to one another, or nearly so; they do not subdivide nor form meshes, except by very short venules. Netted veins (reticulate)

. Plant life, considered with special references to form and function. Plant physiology. THE LEA VES. 127 the large vein and end free (fig. 149). In the first type the finest branches of the -eins, too delicate to be seen without the microscope, often end free in the meshes formed by the next larger branches (fig. 164). Near the margin of a blade. Fig. 150. Fig. 151. Fig. 150.—Parallel venation of leaf of Pcly^onatufii lati/climn. Natural size.— .^ter Ettingshausen. Fig. 151.—Pinnately netted venation of leaf of a -n-illow. Xatural size.—Afier Ettings- hausen. the larger veins are often so co Stock Photo

RMRDYA6R–. Plant life, considered with special references to form and function. Plant physiology. THE LEA VES. 127 the large vein and end free (fig. 149). In the first type the finest branches of the -eins, too delicate to be seen without the microscope, often end free in the meshes formed by the next larger branches (fig. 164). Near the margin of a blade. Fig. 150. Fig. 151. Fig. 150.—Parallel venation of leaf of Pcly^onatufii lati/climn. Natural size.— .^ter Ettingshausen. Fig. 151.—Pinnately netted venation of leaf of a -n-illow. Xatural size.—Afier Ettings- hausen. the larger veins are often so co

. A guide to the wild flowers [microform]. Wild flowers; Botany; Fleurs sauvages; Botanique. â â i i H lo A CMAl'l'ER TO STUDY. off from the midrib and branch again into veinlets that run to- getner and form a network, or mesh. (Fig. 30.) Netteu- veined leaves are said to be Feather -Veined when the sec- ondary veins all start from the sides of llie midrib, running from the base to the apex of the leaf. (I'k;. 31.) Tjiey are called Palmately-Veined when several veins of equal size start from the same point at the base of the leaf and spread out towards the margin. Parallel-Veined leaves are t Stock Photo

RMREMX9R–. A guide to the wild flowers [microform]. Wild flowers; Botany; Fleurs sauvages; Botanique. â â i i H lo A CMAl'l'ER TO STUDY. off from the midrib and branch again into veinlets that run to- getner and form a network, or mesh. (Fig. 30.) Netteu- veined leaves are said to be Feather -Veined when the sec- ondary veins all start from the sides of llie midrib, running from the base to the apex of the leaf. (I'k;. 31.) Tjiey are called Palmately-Veined when several veins of equal size start from the same point at the base of the leaf and spread out towards the margin. Parallel-Veined leaves are t

. Elementary botany [microform]. Botany; Botanique. BUDS 23 Vernation is the tf-rm -,, r 1 each siâKlc. leaf is pXi,T',r','" f""?' '"'^ "Â«"" i.. which //Â«'Â«(figs. 20 ,,1 T, "" '""'â¢ ^ach leaf nnv h I the lamina may he simolv Z/ ^ .'''"'â¢ ^ '^^" f^v., halves of two pages of a hook ^ ^ "^"^^^'^^ ^"t^^"^''^''' ^long the mid-dh 1 U ff^-'^- 30, 33); or tliere may he a number of folds (%â¢ 34) along several of the large veins, especiallv in leaves with parallel venation (^.,^.-. 0,^,^^ grasses) and with palmate Stock Photo

RMREMT36–. Elementary botany [microform]. Botany; Botanique. BUDS 23 Vernation is the tf-rm -,, r 1 each siâKlc. leaf is pXi,T',r','" f""?' '"'^ "Â«"" i.. which //Â«'Â«(figs. 20 ,,1 T, "" '""'â¢ ^ach leaf nnv h I the lamina may he simolv Z/ ^ .'''"'â¢ ^ '^^" f^v., halves of two pages of a hook ^ ^ "^"^^^'^^ ^"t^^"^''^''' ^long the mid-dh 1 U ff^-'^- 30, 33); or tliere may he a number of folds (%â¢ 34) along several of the large veins, especiallv in leaves with parallel venation (^.,^.-. 0,^,^^ grasses) and with palmate

RMRDGECY–. Foundations of botany. Botany; Botany. 136 FOUNDATIONS OF BOTANY. Fig. lOO. — Parallel- TeinedLeafofSol. omon's Seal. bristle-shaped objects at the base of the leaf, as in the apple leaf (Fig. 98), sometimes as leaf-like bodies, for example in the pansy (Fig. 99), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig. 103). 145. Parallel-Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly parallel, lengthwise through t

RMRDGECW–. Foundations of botany. Botany; Botany. Fig. lOO. — Parallel- TeinedLeafofSol. omon's Seal. bristle-shaped objects at the base of the leaf, as in the apple leaf (Fig. 98), sometimes as leaf-like bodies, for example in the pansy (Fig. 99), and in many other forms, one of which is that of spinous appendages, as shown in the common locust (Fig. 103). 145. Parallel-Veined Leaves. — The leaves of many great groups of plants, such as the lilies, the sedges, and the grasses, are commonly parallel-veined, that is, with the veins running nearly parallel, lengthwise through the blade, as shown in Fig.

. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. Fig. 208. —Palmately net- veined leaf of wild ginger. leaf (Fig. 208) into a number of primary veins or ribs, which radiate in all directions like the fingers from the palm of the hand; hence, such a leaf is said to be palmately veined. Net-veined leaves — the plantain (Fig. 209), wild smilax, beech, dog- wood — are sometimes ribbed in a way that might lead an inexperi- enced observer to confound them with parallel-veined ones, but the reticulations between the ribs show t Stock Photo

RMRE3A7G–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. Fig. 208. —Palmately net- veined leaf of wild ginger. leaf (Fig. 208) into a number of primary veins or ribs, which radiate in all directions like the fingers from the palm of the hand; hence, such a leaf is said to be palmately veined. Net-veined leaves — the plantain (Fig. 209), wild smilax, beech, dog- wood — are sometimes ribbed in a way that might lead an inexperi- enced observer to confound them with parallel-veined ones, but the reticulations between the ribs show t

. College botany; structure, physiology and economics of plants. Botany. LEAVES 71 function which the leaf may serve. Leaves may be divided on basis of venation into net-veined, in which the veins interlace, and parallel-veined, in which the primary veins run more or less parallel (Fig. 49). The net-veined are of two types, those in which the secondary veins arise from the mid-rib and are known as pinnately veined (Fig. 49) and those which have three, five, seven or nine primary veins or mid-ribs giving rise tO' the sec-. FiG. 49.—Typical net-veined leaf and typical parallel-veined leaf. Fig. Stock Photo

RMRE1P32–. College botany; structure, physiology and economics of plants. Botany. LEAVES 71 function which the leaf may serve. Leaves may be divided on basis of venation into net-veined, in which the veins interlace, and parallel-veined, in which the primary veins run more or less parallel (Fig. 49). The net-veined are of two types, those in which the secondary veins arise from the mid-rib and are known as pinnately veined (Fig. 49) and those which have three, five, seven or nine primary veins or mid-ribs giving rise tO' the sec-. FiG. 49.—Typical net-veined leaf and typical parallel-veined leaf. Fig.

. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. 156 PRACTICAL COURSE IN BOTANY. Fig. 208. —Palmately net- veined leaf of wild ginger. leaf (Fig. 208) into a number of primary veins or ribs, which radiate in all directions like the fingers from the palm of the hand; hence, such a leaf is said to be palmately veined. Net-veined leaves — the plantain (Fig. 209), wild smilax, beech, dog- wood — are sometimes ribbed in a way that might lead an inexperi- enced observer to confound them with parallel-veined ones, but the retic Stock Photo

RMRE3A7P–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. 156 PRACTICAL COURSE IN BOTANY. Fig. 208. —Palmately net- veined leaf of wild ginger. leaf (Fig. 208) into a number of primary veins or ribs, which radiate in all directions like the fingers from the palm of the hand; hence, such a leaf is said to be palmately veined. Net-veined leaves — the plantain (Fig. 209), wild smilax, beech, dog- wood — are sometimes ribbed in a way that might lead an inexperi- enced observer to confound them with parallel-veined ones, but the retic

RMRE0NFR–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 170 SYSTEMATIC BOTANY.. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the, stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately parallel, passing usually from the base â to the apex (Fig. 2

RMRE0NFN–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the, stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately parallel, passing usually from the base â to the apex (Fig. 283). The flower in the g

RMRDJ8TM–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately ^^ â parallel, passing usually from the base to the apex (Fig. 283). The flower in the

RMRDJ8W2–. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 170 SYSTEMATIC BOTANY.. bundle of each leaf (Fig. 282) passes deep towards the centre, and the lateral bundles (Fig. 282) curve downwards in the peripheral portions of the stem. There are many deviations from this type, especially by the bundles having lateral anastomosing branches. The fibro-vascular bundles (or veins) in the leaf are approximately ^^ â parallel, passing usually from the base to the apex (Fig.

. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. coloring fluid a short time before the lesson begins. The leafstalks of celery and plantain are excellent for showing the relation between the leaf veins and vascular system of the plant. 171. Parallel and net veining. — Compare a leaf of the wandering Jew, lily, or any kind of grass, with one of grape, ivy, or willow. Hold each up to the light, and note the veins or little threads of woody substance that run through it. Make a draw- ing of each so as to show plainly the d Stock Photo

RMRE3A81–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. coloring fluid a short time before the lesson begins. The leafstalks of celery and plantain are excellent for showing the relation between the leaf veins and vascular system of the plant. 171. Parallel and net veining. — Compare a leaf of the wandering Jew, lily, or any kind of grass, with one of grape, ivy, or willow. Hold each up to the light, and note the veins or little threads of woody substance that run through it. Make a draw- ing of each so as to show plainly the d

RMRE3A7T–. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. coloring fluid a short time before the lesson begins. The leafstalks of celery and plantain are excellent for showing the relation between the leaf veins and vascular system of the plant. 171. Parallel and net veining. — Compare a leaf of the wandering Jew, lily, or any kind of grass, with one of grape, ivy, or willow. Hold each up to the light, and note the veins or little threads of woody substance that run through it. Make a draw- ing of each so as to show plainly the d

RMRDTHTX–. Nature and development of plants. Botany. Fig. 3. Forms of leaves: A, leaf of white birch with netted veins—p, petiole; b, blade. B, leaf of Solomon's seal with parallel venation and blade clasping stem without petiole. leaves bring the plant into harmony with its surroundings and give to it a subtle individuality owing to the perfection of their arrangements, structures and forms for the work in hand. The 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not per

Parallel leaf veins Black & White Stock Photos

Parallel leaf veins Black & White Stock Photos

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