Burs from plants hi-res stock photography and images

common burdock, lesser burdock (Arctium minus), girl having fixed burr fruits at her pullover in the shape of a heart, Germany Stock Photo

RMCNT9N0–common burdock, lesser burdock (Arctium minus), girl having fixed burr fruits at her pullover in the shape of a heart, Germany

View from top of Barrel Cactus at Huntington Gardens in San Marino, Southern California. Stock Photo

RMD980EG–View from top of Barrel Cactus at Huntington Gardens in San Marino, Southern California.

domestic cattle (Bos primigenius f. taurus), with burdocks adhering at its head, Germany, North Rhine-Westphalia Stock Photo

RMDAED1B–domestic cattle (Bos primigenius f. taurus), with burdocks adhering at its head, Germany, North Rhine-Westphalia

. Some common insects and insects of Nebraska corn fields and potato patches... ach bur containstwo flowers which later produce seeds. One of these seeds germinates thefirst spring while the other usually does not start to grow until some laterseason; however, both seeds have been known to produce plants the sameyear. The cocklebur riot only damages the growing crop, but because of theindigestibility of the husks and the barbs with which they are protected, itis especially injurious to stock. The burs are scattered from one field toanother by water, also by rabbits, dogs, and other animals. St Stock Photo

RM2AG3J8R–. Some common insects and insects of Nebraska corn fields and potato patches... ach bur containstwo flowers which later produce seeds. One of these seeds germinates thefirst spring while the other usually does not start to grow until some laterseason; however, both seeds have been known to produce plants the sameyear. The cocklebur riot only damages the growing crop, but because of theindigestibility of the husks and the barbs with which they are protected, itis especially injurious to stock. The burs are scattered from one field toanother by water, also by rabbits, dogs, and other animals. St

Woolly burdock, Hairy burdock, Burdock, Bardane (Arctium tomentosum), inflorescence, Germany, Bavaria, Oberbayern, Upper Bavaria Stock Photo

RMFJ66WK–Woolly burdock, Hairy burdock, Burdock, Bardane (Arctium tomentosum), inflorescence, Germany, Bavaria, Oberbayern, Upper Bavaria

Archive image from page 21 of Descriptive and illustrated catalogue of. Descriptive and illustrated catalogue of fruit trees, ornamental plants and roses . descriptiveillus1895atla Year: 1895 JAP N GIANT CHESTNUT. nuts are the wonder and admiration of all who see them. Matures early, and does not require the aid of frost to open the burs. Its early bearing and handsome dwarf habit make it desirable for the home grounds. FILBERTS. These, frequently termed hazelnuts, are of the easiest culture, and are among the most profitable and satisfac- tory nuts to grow ; of dwarf habit, entirely hardy ; Stock Photo

RMW14MYP–Archive image from page 21 of Descriptive and illustrated catalogue of. Descriptive and illustrated catalogue of fruit trees, ornamental plants and roses . descriptiveillus1895atla Year: 1895 JAP N GIANT CHESTNUT. nuts are the wonder and admiration of all who see them. Matures early, and does not require the aid of frost to open the burs. Its early bearing and handsome dwarf habit make it desirable for the home grounds. FILBERTS. These, frequently termed hazelnuts, are of the easiest culture, and are among the most profitable and satisfac- tory nuts to grow ; of dwarf habit, entirely hardy ;

. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. DISPERSAL BY ANIMALS. 829 Here some of the spherical, closely-crowded lateral shoots growing from the old plant loosen spontaneously and fall to the ground; others again remain in situ but adhere very slightly, so that a passing contact or a gentle touch is enough to complete the separation from the old plant. Now bristles are formed at the top of each papilla of these Mamilkrias, some of which end in barbs, so that the spherical shoots resemble burs. They adhere just like burs to the hairy paws or f Stock Photo

RMPG2MA8–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. DISPERSAL BY ANIMALS. 829 Here some of the spherical, closely-crowded lateral shoots growing from the old plant loosen spontaneously and fall to the ground; others again remain in situ but adhere very slightly, so that a passing contact or a gentle touch is enough to complete the separation from the old plant. Now bristles are formed at the top of each papilla of these Mamilkrias, some of which end in barbs, so that the spherical shoots resemble burs. They adhere just like burs to the hairy paws or f

RMD980CY–View from top of Barrel Cactus at Huntington Gardens in San Marino, Southern California.

Annual report ..[bulletins and circulars] . 37.—Burs stealing a ride. 64 ture pod in the blossom which was the ovary, and contained theovules or young seeds. Similarly you easily distinguish morning-glory seeds from its fruits, the nasturtium seeds from the fruits.In all these cases and in hundreds of others the fruit is a pod andopens at maturity to let the seeds escape, but there are also hund-reds of kinds of plants in which the ovary ripens with a singleseed inside of it and does not open at maturity. In this casethe fruit is usually but little larger than the contained seed andoften looks Stock Photo

RM2AX2W99–Annual report ..[bulletins and circulars] . 37.—Burs stealing a ride. 64 ture pod in the blossom which was the ovary, and contained theovules or young seeds. Similarly you easily distinguish morning-glory seeds from its fruits, the nasturtium seeds from the fruits.In all these cases and in hundreds of others the fruit is a pod andopens at maturity to let the seeds escape, but there are also hund-reds of kinds of plants in which the ovary ripens with a singleseed inside of it and does not open at maturity. In this casethe fruit is usually but little larger than the contained seed andoften looks

RMFJ66Y1–Woolly burdock, Hairy burdock, Burdock, Bardane (Arctium tomentosum), inflorescence, Germany, Bavaria, Oberbayern, Upper Bavaria

RMW14N0P–Archive image from page 21 of Descriptive and illustrated catalogue of. Descriptive and illustrated catalogue of fruit trees, ornamental plants and roses . descriptiveillus1895atla Year: 1895 AMERICAN OR SWEET CHESTNUT. JAP N GIANT CHESTNUT. nuts are the wonder and admiration of all who see them. Matures early, and does not require the aid of frost to open the burs. Its early bearing and handsome dwarf habit make it desirable for the home grounds. FILBERTS. These, frequently termed hazelnuts, are of the easiest culture, and are among the most profitable and satisfac- tory nuts to grow ; o

. Beginners' botany. Botany. CHAPTER XXII DISPERSAL OF SEEDS It is to the plant's advantage to have its seeds distributed as widely as possible. It has a better chajice of surviving in the struggle for existence. It gets away from competi- tion. Many seeds and fruits are of such character as to increase their chances of wide dispersal. The commonest means of dissemination may be classed under four heads : explosive fruits ; transportation by wind; transportation by birds; burs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada Stock Photo

RMPG25T7–. Beginners' botany. Botany. CHAPTER XXII DISPERSAL OF SEEDS It is to the plant's advantage to have its seeds distributed as widely as possible. It has a better chajice of surviving in the struggle for existence. It gets away from competi- tion. Many seeds and fruits are of such character as to increase their chances of wide dispersal. The commonest means of dissemination may be classed under four heads : explosive fruits ; transportation by wind; transportation by birds; burs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada

RMD980D8–View from top of Barrel Cactus at Huntington Gardens in San Marino, Southern California.

. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. DISPERSAL OF SEEDS 327. It is to the advantage of the plant to have its seeds distributed as widely as possible. It has a better chance of surviving in the struggle for existence. It gets away from competition. Many seeds and fruits are of such character as to increase their chances of wide dis- persal. The commonest means of dissemination may be classed under four heads: explosive fruits; transporta- tion by wind; transporta- tion by birds; transportation as burs. 328. Explosive Fruits.— So Stock Photo

RMRH8Y5M–. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. DISPERSAL OF SEEDS 327. It is to the advantage of the plant to have its seeds distributed as widely as possible. It has a better chance of surviving in the struggle for existence. It gets away from competition. Many seeds and fruits are of such character as to increase their chances of wide dis- persal. The commonest means of dissemination may be classed under four heads: explosive fruits; transporta- tion by wind; transporta- tion by birds; transportation as burs. 328. Explosive Fruits.— So

Archive image from page 22 of Descriptive and illustrated catalogue of. Descriptive and illustrated catalogue of fruit trees, ornamental plants and roses . descriptiveillus1894atla Year: 1894 JAPAN GIANT. mous nuts are the wonder and admiration of all who see them. .Matures early and does not require the aid of frost to open the burs. Its early bearing anil handsome dwarf habit make it desirable for the home grounds. FILBERTS. These, frequently termed hazlenuts, are of the easiest culture, and are among the most profitable and satisfac- tory nuts to grow ; of dwarf habit, entirely hardy ; abu Stock Photo

RMW14NCG–Archive image from page 22 of Descriptive and illustrated catalogue of. Descriptive and illustrated catalogue of fruit trees, ornamental plants and roses . descriptiveillus1894atla Year: 1894 JAPAN GIANT. mous nuts are the wonder and admiration of all who see them. .Matures early and does not require the aid of frost to open the burs. Its early bearing anil handsome dwarf habit make it desirable for the home grounds. FILBERTS. These, frequently termed hazlenuts, are of the easiest culture, and are among the most profitable and satisfac- tory nuts to grow ; of dwarf habit, entirely hardy ; abu

. Foundations of botany. Botany; Botany. 384 FOUNDATIONS OF BOTANY of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evi- dently the pulp of fruits is not to be consumed or used. Pl6. 273. — Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticlcs, magniiled eleven times; n, book of cocklebur, magnified eleven times; 111, beggar's-tieks fruit, natural size; TV, cocklebur hook, natural size. as food by the plant itself or (in general) by its seeds. It is worth while, therefore, for the student to ask himself some such que Stock Photo

RMPG3TWA–. Foundations of botany. Botany; Botany. 384 FOUNDATIONS OF BOTANY of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evi- dently the pulp of fruits is not to be consumed or used. Pl6. 273. — Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticlcs, magniiled eleven times; n, book of cocklebur, magnified eleven times; 111, beggar's-tieks fruit, natural size; TV, cocklebur hook, natural size. as food by the plant itself or (in general) by its seeds. It is worth while, therefore, for the student to ask himself some such que

RMRDA88K–. Beginners' botany. Botany. CHAPTER XXII DISPERSAL OF SEEDS It is to the plant's advantage to have its seeds distributed as widely as possible. It has a better chajice of surviving in the struggle for existence. It gets away from competi- tion. Many seeds and fruits are of such character as to increase their chances of wide dispersal. The commonest means of dissemination may be classed under four heads : explosive fruits ; transportation by wind; transportation by birds; burs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada

. Essentials of botany. Botany; Botany. I II Fig. 148. Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticks (magnified eleven times); II, hook of cocklebur (magnified eleven times); III, beggar's-ticks fruit (natural size); IV, cocklebur hook (natural size). amount of sugar and other food material which they con- tain is very considerable. It is a well-recognized principle of botany, and of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evidently the pulp of fruits is not to be consumed or used as food by the plant it Stock Photo

RMPG41KB–. Essentials of botany. Botany; Botany. I II Fig. 148. Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticks (magnified eleven times); II, hook of cocklebur (magnified eleven times); III, beggar's-ticks fruit (natural size); IV, cocklebur hook (natural size). amount of sugar and other food material which they con- tain is very considerable. It is a well-recognized principle of botany, and of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evidently the pulp of fruits is not to be consumed or used as food by the plant it

. Beginners' botany. Botany. CHAPTER XXII DISPERSAL OF SEEDS It is to the plant's advantage to have its seeds distributed as widely as possible. // has a better chance of surviving in the struggle for existence. It gets away from competi- tion. Many seeds and fruits are of such character as to increase their chances of wide dispersal. The commonest means of dissemination may be classed under four heads: explosive fruits ; transportation by wind; transportation by birds ; burs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab Stock Photo

RMRHXJKE–. Beginners' botany. Botany. CHAPTER XXII DISPERSAL OF SEEDS It is to the plant's advantage to have its seeds distributed as widely as possible. // has a better chance of surviving in the struggle for existence. It gets away from competi- tion. Many seeds and fruits are of such character as to increase their chances of wide dispersal. The commonest means of dissemination may be classed under four heads: explosive fruits ; transportation by wind; transportation by birds ; burs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab

. Southern field crops (exclusive of forage plants). Agriculture. 260 SOUTHERN FIELD CROPS. Fig. 128. — A Cotton Plant Deficient in Storm Resistance. Bolls of upland cotton are usually of such size that from 40 to 110 are required to make a pound of seed cotton. When the boU ripens, it splits usually into four or five divisions, exposing the seed cotton. The parts of the pod, or bur, separate more or less completely. If they open wide and the outer walls of the burs curl backward, the seed cotton may be held so slightly that it is easily blown out by wind or beaten out by rain (Pig. 128).. Ple Stock Photo

RMPG25PF–. Southern field crops (exclusive of forage plants). Agriculture. 260 SOUTHERN FIELD CROPS. Fig. 128. — A Cotton Plant Deficient in Storm Resistance. Bolls of upland cotton are usually of such size that from 40 to 110 are required to make a pound of seed cotton. When the boU ripens, it splits usually into four or five divisions, exposing the seed cotton. The parts of the pod, or bur, separate more or less completely. If they open wide and the outer walls of the burs curl backward, the seed cotton may be held so slightly that it is easily blown out by wind or beaten out by rain (Pig. 128).. Ple

. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. CHAPTER XXIV. DISPERSAL OF SEEDS 327. It is to the advantage of the plant to have its seeds distributed as widely as possible. It has a better chance of surviving in the struggle for existence. It gets away from competition. Many seeds and fruits are of such character as to increase their chances of wide dis- persal. The commonest means of dissemination may be classed under four heads: explosive fruits; transporta- tion by wind; transporta- tion by birds; transportation as burs. 328. Explosi Stock Photo

RMRH8Y69–. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. CHAPTER XXIV. DISPERSAL OF SEEDS 327. It is to the advantage of the plant to have its seeds distributed as widely as possible. It has a better chance of surviving in the struggle for existence. It gets away from competition. Many seeds and fruits are of such character as to increase their chances of wide dis- persal. The commonest means of dissemination may be classed under four heads: explosive fruits; transporta- tion by wind; transporta- tion by birds; transportation as burs. 328. Explosi

. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1. X. spiN6snM L. Hoary-pubescent, armed at the axils with triple spines; stems slender; leaves lanceolate or ovate- lauceolate, short-petiolate, white-downy beneath, often 2-3-lobed or -cut; fruit about 1 cm. long, with a single short beak or beakless. â Waste places. Me. to Ont., westw. and southw. (Nat. from Trop. Am.) Fig. 085. 2. X. canadfinse Mill. Leaves broadly ovate, cordate, usually 3-lobed and simply or doubly dentate ; burs gla- brou Stock Photo

RMPFYHPE–. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1. X. spiN6snM L. Hoary-pubescent, armed at the axils with triple spines; stems slender; leaves lanceolate or ovate- lauceolate, short-petiolate, white-downy beneath, often 2-3-lobed or -cut; fruit about 1 cm. long, with a single short beak or beakless. â Waste places. Me. to Ont., westw. and southw. (Nat. from Trop. Am.) Fig. 085. 2. X. canadfinse Mill. Leaves broadly ovate, cordate, usually 3-lobed and simply or doubly dentate ; burs gla- brou

. Some ornamental shrubs for the Tropics. Shrubs Tropics. SOME ORNAMENTAL SHRUBS FOR THE TROPICS 29. Figure 10.—The flowers of Beloperone guttata are white, with purple markings, and protrude from bright-colored bracts. They are short-lived. used as flavoring and coloring for foods. The plants eventually become trees, but this growth requires many years. They can be maintained as shrubs by occasional cutting. The anatto is usually not considered an ornamental, but it functions as such. During the fall the lavender-pink flowers appear. In the winter the ripening red burs are also attractive. Th Stock Photo

RMRF5FM3–. Some ornamental shrubs for the Tropics. Shrubs Tropics. SOME ORNAMENTAL SHRUBS FOR THE TROPICS 29. Figure 10.—The flowers of Beloperone guttata are white, with purple markings, and protrude from bright-colored bracts. They are short-lived. used as flavoring and coloring for foods. The plants eventually become trees, but this growth requires many years. They can be maintained as shrubs by occasional cutting. The anatto is usually not considered an ornamental, but it functions as such. During the fall the lavender-pink flowers appear. In the winter the ripening red burs are also attractive. Th

RMPFYHPT–. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1. X. spiN6snM L. Hoary-pubescent, armed at the axils with triple spines; stems slender; leaves lanceolate or ovate- lauceolate, short-petiolate, white-downy beneath, often 2-3-lobed or -cut; fruit about 1 cm. long, with a single short beak or beakless. â Waste places. Me. to Ont., westw. and southw. (Nat. from Trop. Am.) Fig. 085. 2. X. canadfinse Mill. Leaves broadly ovate, cordate, usually 3-lobed and simply or doubly dentate ; burs gla- brou

RMRHYKT1–. Beginners botany. Botany. CHAPTER XXII DISPERSAL OF SEEDS It is to the plant's advantage to have its seeds distributed as widely as possible. // has a better e/iance of surviving hi the struggle for cxistetice. It gets away from competi- tion. Many seeds and fruits are of such character as to increase their chances of wide dispersal. The commonest means of dissemination may be classed under four heads : explosive f-uits ; transportation by wind; transportation by birds; burs.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada

RMRFD1HB–. Some ornamental shrubs for the Tropics. Shrubs Tropics. SOME ORNAMENTAL SHRUBS FOR THE TROPICS 29. Figure 10.—The flowers of Beloperone guttata are white, with purple markings, and protrude from bright-colored bracts. They are short-lived. used as flavoring and coloring for foods. The plants eventually become trees, but this growth requires many years. They can be maintained as shrubs by occasional cutting. The anatto is usually not considered an ornamental, but it functions as such. During the fall the lavender-pink flowers appear. In the winter the ripening red burs are also attractive. Th

RMRDG9WB–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. DISPERSAL BY ANIMALS. 829 Here some of the spherical, closely-crowded lateral shoots growing from the old plant loosen spontaneously and fall to the ground; others again remain in situ but adhere very slightly, so that a passing contact or a gentle touch is enough to complete the separation from the old plant. Now bristles are formed at the top of each papilla of these Mamilkrias, some of which end in barbs, so that the spherical shoots resemble burs. They adhere just like burs to the hairy paws or f

. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. 770 MANUAL OF POISONOUS PLANTS obstruct the intestines and prove fatal. In these cases, death is evidently not from any poison- ous quality of the hay, but is due to mechanical causes. While Cocklebur may not be poison- ous, it may in a similar manner kill swine by mechanical obstructions. When the burs are ripe, they readily leave the plant, and attach themselves to the coat of any passing animaK The plant is especially annoying to Stock Photo

RMRDYA10–. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. 770 MANUAL OF POISONOUS PLANTS obstruct the intestines and prove fatal. In these cases, death is evidently not from any poison- ous quality of the hay, but is due to mechanical causes. While Cocklebur may not be poison- ous, it may in a similar manner kill swine by mechanical obstructions. When the burs are ripe, they readily leave the plant, and attach themselves to the coat of any passing animaK The plant is especially annoying to

. Botany for agricultural students. Plants. GRASS FAMILY 495 Some other well-known weeds of the family are the Cockle- burs, Ragweeds, Ironweeds, Spanish Needles, Wild Lettuce, and Beggar-ticks. Monocotyledons Among Monocotjdedons about 25,000 species are recognized, which are distributed among 42 families. They are less than one-fourth as numerous as the Dicotyledons. As previously stated, Monocotyledons differ from Dicotyledons in having flowers with parts usually in threes or sixes, leaves with parallel veins except in rare cases, and vascular bundles with the scattered arrangement. The Mon Stock Photo

RMRH8GR2–. Botany for agricultural students. Plants. GRASS FAMILY 495 Some other well-known weeds of the family are the Cockle- burs, Ragweeds, Ironweeds, Spanish Needles, Wild Lettuce, and Beggar-ticks. Monocotyledons Among Monocotjdedons about 25,000 species are recognized, which are distributed among 42 families. They are less than one-fourth as numerous as the Dicotyledons. As previously stated, Monocotyledons differ from Dicotyledons in having flowers with parts usually in threes or sixes, leaves with parallel veins except in rare cases, and vascular bundles with the scattered arrangement. The Mon

RMRDHFMN–. Essentials of botany. Botany; Botany. I II Fig. 148. Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticks (magnified eleven times); II, hook of cocklebur (magnified eleven times); III, beggar's-ticks fruit (natural size); IV, cocklebur hook (natural size). amount of sugar and other food material which they con- tain is very considerable. It is a well-recognized principle of botany, and of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evidently the pulp of fruits is not to be consumed or used as food by the plant it

. Bulletin. 1901-13. Agriculture; Agriculture. Bui. 267, Bureau of Plant Industry, U. S. Dept. of Agriculture Plate V.. Fig. 1.—Rows of Burs from Single Plants of Medicago, Showing Variation in Size. Upper row. JI. JuKjiida nigra; middle and lower rows, M. hispida dcnticidata. (Enlarged 2f diameters.). 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.. United States. Bureau of Plant Industry, Soils, and Agricultural Engineerin Stock Photo

RMRGWH89–. Bulletin. 1901-13. Agriculture; Agriculture. Bui. 267, Bureau of Plant Industry, U. S. Dept. of Agriculture Plate V.. Fig. 1.—Rows of Burs from Single Plants of Medicago, Showing Variation in Size. Upper row. JI. JuKjiida nigra; middle and lower rows, M. hispida dcnticidata. (Enlarged 2f diameters.). 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.. United States. Bureau of Plant Industry, Soils, and Agricultural Engineerin

. Essentials of botany. Botany; Botany. IV I n Fig. 148. Barbb and Hooks of Burs. I, barbed points from fruit of beggar's-ticks (magnified eleven times); II, hook of cocklebur (magnified eleven times); III, beggar's-ticlss fruit (natural size); IV, cocklebur hook (natural size). amount of sugar and other food material which they con- tain is very considerable. It is a well-recognized principle of botanj-, and of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evidently the pulp of fruits is not to be consumed or used as food by the plan Stock Photo

RMRDWFYC–. Essentials of botany. Botany; Botany. IV I n Fig. 148. Barbb and Hooks of Burs. I, barbed points from fruit of beggar's-ticks (magnified eleven times); II, hook of cocklebur (magnified eleven times); III, beggar's-ticlss fruit (natural size); IV, cocklebur hook (natural size). amount of sugar and other food material which they con- tain is very considerable. It is a well-recognized principle of botanj-, and of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evidently the pulp of fruits is not to be consumed or used as food by the plan

. Foundations of Botany. Botany. 384 FOUNDATIONS OF BOTANY of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evi- dently the pulp of fruits is not to be consumed or used. Fig. 273. — Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticks, magnified eleven times; II, hook of cocklebur, magnified eleven times; III, beggar's-ticks fruit, natural size; IV, cocklebur hook, natural size. as food by the plant itself or (in general) by its seeds. It is worth while, therefore, for the student to ask himself some such questions a Stock Photo

RMRHWFMT–. Foundations of Botany. Botany. 384 FOUNDATIONS OF BOTANY of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evi- dently the pulp of fruits is not to be consumed or used. Fig. 273. — Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticks, magnified eleven times; II, hook of cocklebur, magnified eleven times; III, beggar's-ticks fruit, natural size; IV, cocklebur hook, natural size. as food by the plant itself or (in general) by its seeds. It is worth while, therefore, for the student to ask himself some such questions a

RMRDJJ1C–. Foundations of botany. Botany; Botany. 384 FOUNDATIONS OF BOTANY of zoology as well, that plants and animals do not make unrewarded outlays for the benefit of other species. Evi- dently the pulp of fruits is not to be consumed or used. Pl6. 273. — Barbs and Hooks of Burs. I, barbed points from fruit of beggar's-ticlcs, magniiled eleven times; n, book of cocklebur, magnified eleven times; 111, beggar's-tieks fruit, natural size; TV, cocklebur hook, natural size. as food by the plant itself or (in general) by its seeds. It is worth while, therefore, for the student to ask himself some such que

. Bulletin. 1901-13. Agriculture; Agriculture. Fig. 1.—Rows of Burs from Single Plants of Medicago, Showing Variation in Size. Upper row. JI. JuKjiida nigra; middle and lower rows, M. hispida dcnticidata. (Enlarged 2f diameters.). Fig. 2.—Pods and Seeds of Medicago radiata, Showing Seed and Venation of Pods. (Enlarged 2 diameters.). 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.. United States. Bureau of Plant Industry, Soi Stock Photo

RMRGWH76–. Bulletin. 1901-13. Agriculture; Agriculture. Fig. 1.—Rows of Burs from Single Plants of Medicago, Showing Variation in Size. Upper row. JI. JuKjiida nigra; middle and lower rows, M. hispida dcnticidata. (Enlarged 2f diameters.). Fig. 2.—Pods and Seeds of Medicago radiata, Showing Seed and Venation of Pods. (Enlarged 2 diameters.). 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.. United States. Bureau of Plant Industry, Soi

RMRDA874–. Southern field crops (exclusive of forage plants). Agriculture. 260 SOUTHERN FIELD CROPS. Fig. 128. — A Cotton Plant Deficient in Storm Resistance. Bolls of upland cotton are usually of such size that from 40 to 110 are required to make a pound of seed cotton. When the boU ripens, it splits usually into four or five divisions, exposing the seed cotton. The parts of the pod, or bur, separate more or less completely. If they open wide and the outer walls of the burs curl backward, the seed cotton may be held so slightly that it is easily blown out by wind or beaten out by rain (Pig. 128).. Ple

RMRDAHFD–. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1. X. spiN6snM L. Hoary-pubescent, armed at the axils with triple spines; stems slender; leaves lanceolate or ovate- lauceolate, short-petiolate, white-downy beneath, often 2-3-lobed or -cut; fruit about 1 cm. long, with a single short beak or beakless. â Waste places. Me. to Ont., westw. and southw. (Nat. from Trop. Am.) Fig. 085. 2. X. canadfinse Mill. Leaves broadly ovate, cordate, usually 3-lobed and simply or doubly dentate ; burs gla- brou

RMRDAHFJ–. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1. X. spiN6snM L. Hoary-pubescent, armed at the axils with triple spines; stems slender; leaves lanceolate or ovate- lauceolate, short-petiolate, white-downy beneath, often 2-3-lobed or -cut; fruit about 1 cm. long, with a single short beak or beakless. â Waste places. Me. to Ont., westw. and southw. (Nat. from Trop. Am.) Fig. 085. 2. X. canadfinse Mill. Leaves broadly ovate, cordate, usually 3-lobed and simply or doubly dentate ; burs gla- brou

. Elements of botany. Plants. 190 ELEMENTS OF BOTANY. The usefulness of burs to the plant which produces them is evident enough.. 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.. Bergen, Joseph Y. (Joseph Young), 1851-1917; Bergen, Joseph Y. (Joseph Young), 1851-1917. Bergen's Botany: key and flora, Pacific coast ed. Boston : Ginn Stock Photo

RMRCRPXC–. Elements of botany. Plants. 190 ELEMENTS OF BOTANY. The usefulness of burs to the plant which produces them is evident enough.. 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.. Bergen, Joseph Y. (Joseph Young), 1851-1917; Bergen, Joseph Y. (Joseph Young), 1851-1917. Bergen's Botany: key and flora, Pacific coast ed. Boston : Ginn

. Elements of botany. Plants. THE FRUIT. 189 It is an interesting and well-established fact that a good many birds, especially bluejays, bury large numbers of acorns and nuts which they intend to consume later, and that they leave a considerable portion of }lu ']â /-'v/^( these deposits untouched. In this way large numbers of trees are annually planted. â¢ 228. Burs. â A large class of fruits is characterized by the presence of hooks on the outer surface. These are sometimes out- growths from the ovary, sometimes from the calyx, sometimes from an involucre. Their office is to attach the frui Stock Photo

RMRCRPXG–. Elements of botany. Plants. THE FRUIT. 189 It is an interesting and well-established fact that a good many birds, especially bluejays, bury large numbers of acorns and nuts which they intend to consume later, and that they leave a considerable portion of }lu ']â /-'v/^( these deposits untouched. In this way large numbers of trees are annually planted. â¢ 228. Burs. â A large class of fruits is characterized by the presence of hooks on the outer surface. These are sometimes out- growths from the ovary, sometimes from the calyx, sometimes from an involucre. Their office is to attach the frui

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