Primary xylem tissue Cut Out Stock Images
Cross section of a vascular bundle in the stem showing food-conducting phloem and water-conducting xylem Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/cross-section-of-a-vascular-bundle-in-the-stem-showing-food-conducting-phloem-and-water-conducting-xylem-image435361174.htmlRF2G88BHA–Cross section of a vascular bundle in the stem showing food-conducting phloem and water-conducting xylem
![. Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt Stock Photo](https://c8.alamy.com/comp/RDFDR8/fossil-plants-for-students-of-botany-and-geology-paleobotany-xxxn-volkelia-209-black-patches-in-fig-461-a-in-all-probability-represents-the-primary-part-of-each-stele-to-which-the-rest-of-the-tissue-has-been-added-by-the-cambium-a-striking-feature-of-the-secondary-xylem-is-the-absence-of-medullary-rays-the-tracheids-resemble-those-of-cladoxylon-and-protopitys-in-the-transverse-elongation-of-the-pits-fig-461-d-which-form-either-a-single-row-or-several-irregularly-distributed-rows-the-primary-xylem-consists-in-the-peripheral-region-of-tracheids-with-very-narrow-scalariform-pitt-RDFDR8.jpg ". Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt Stock Photo")
. Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fossil-plants-for-students-of-botany-and-geology-paleobotany-xxxn-volkelia-209-black-patches-in-fig-461-a-in-all-probability-represents-the-primary-part-of-each-stele-to-which-the-rest-of-the-tissue-has-been-added-by-the-cambium-a-striking-feature-of-the-secondary-xylem-is-the-absence-of-medullary-rays-the-tracheids-resemble-those-of-cladoxylon-and-protopitys-in-the-transverse-elongation-of-the-pits-fig-461-d-which-form-either-a-single-row-or-several-irregularly-distributed-rows-the-primary-xylem-consists-in-the-peripheral-region-of-tracheids-with-very-narrow-scalariform-pitt-image232065436.htmlRMRDFDR8–. Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt
Structure of plant root Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/structure-of-plant-root-image434330007.htmlRF2G6HC9Y–Structure of plant root
![. Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt Stock Photo](https://c8.alamy.com/comp/PG0D2P/fossil-plants-for-students-of-botany-and-geology-paleobotany-xxxn-volkelia-209-black-patches-in-fig-461-a-in-all-probability-represents-the-primary-part-of-each-stele-to-which-the-rest-of-the-tissue-has-been-added-by-the-cambium-a-striking-feature-of-the-secondary-xylem-is-the-absence-of-medullary-rays-the-tracheids-resemble-those-of-cladoxylon-and-protopitys-in-the-transverse-elongation-of-the-pits-fig-461-d-which-form-either-a-single-row-or-several-irregularly-distributed-rows-the-primary-xylem-consists-in-the-peripheral-region-of-tracheids-with-very-narrow-scalariform-pitt-PG0D2P.jpg ". Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt Stock Photo")
. Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fossil-plants-for-students-of-botany-and-geology-paleobotany-xxxn-volkelia-209-black-patches-in-fig-461-a-in-all-probability-represents-the-primary-part-of-each-stele-to-which-the-rest-of-the-tissue-has-been-added-by-the-cambium-a-striking-feature-of-the-secondary-xylem-is-the-absence-of-medullary-rays-the-tracheids-resemble-those-of-cladoxylon-and-protopitys-in-the-transverse-elongation-of-the-pits-fig-461-d-which-form-either-a-single-row-or-several-irregularly-distributed-rows-the-primary-xylem-consists-in-the-peripheral-region-of-tracheids-with-very-narrow-scalariform-pitt-image216369182.htmlRMPG0D2P–. Fossil plants : for students of botany and geology . Paleobotany. xxxn] VOLKELIA 209 black patches in fig. 461, A, in all probability represents the primary part of each stele to which the rest of the tissue has been added by the cambium. A striking feature of the secondary xylem is the absence of medullary rays: the tracheids resemble those of Cladoxylon and Protopitys in the transverse elongation of the pits (fig. 461, D) which form either a single row or several irregularly distributed rows. The primary xylem consists in the peripheral region of tracheids with very narrow scalariform pitt
Plant root structure Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/plant-root-structure-image434329992.htmlRF2G6HC9C–Plant root structure
Plant root comparison on monocot (left) and dicot (right) Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/plant-root-comparison-on-monocot-left-and-dicot-right-image434329962.htmlRF2G6HC8A–Plant root comparison on monocot (left) and dicot (right)
Functions, origin of lateral roots and secondary growth in Dicot Roots Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/functions-origin-of-lateral-roots-and-secondary-growth-in-dicot-roots-image434329922.htmlRF2G6HC6X–Functions, origin of lateral roots and secondary growth in Dicot Roots
![. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester Stock Photo](https://c8.alamy.com/comp/RDBC3A/fossil-plants-for-students-of-botany-and-geology-paleobotany-xv-lepidodendron-151-the-longitudinal-section-168-c-shows-the-outer-edge-of-the-primary-xylem-x-abutting-on-a-band-of-dark-and-small-celled-parenchyma-which-passes-into-the-broad-zone-of-secondary-tissue-m-the-inner-region-of-which-consists-of-fairly-thick-walled-elements-in-radial-series-passing-externally-into-the-thin-walled-cells-of-the-cambial-region-a-on-the-inner-edge-of-the-secretory-zone-sc-this-section-shows-also-the-interruption-fio-171-lepidodevdron-faliginosum-prom-sections-in-the-manchester-RDBC3A.jpg ". Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester Stock Photo")
. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fossil-plants-for-students-of-botany-and-geology-paleobotany-xv-lepidodendron-151-the-longitudinal-section-168-c-shows-the-outer-edge-of-the-primary-xylem-x-abutting-on-a-band-of-dark-and-small-celled-parenchyma-which-passes-into-the-broad-zone-of-secondary-tissue-m-the-inner-region-of-which-consists-of-fairly-thick-walled-elements-in-radial-series-passing-externally-into-the-thin-walled-cells-of-the-cambial-region-a-on-the-inner-edge-of-the-secretory-zone-sc-this-section-shows-also-the-interruption-fio-171-lepidodevdron-faliginosum-prom-sections-in-the-manchester-image231976286.htmlRMRDBC3A–. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester
![. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester Stock Photo](https://c8.alamy.com/comp/PG167R/fossil-plants-for-students-of-botany-and-geology-paleobotany-xv-lepidodendron-151-the-longitudinal-section-168-c-shows-the-outer-edge-of-the-primary-xylem-x-abutting-on-a-band-of-dark-and-small-celled-parenchyma-which-passes-into-the-broad-zone-of-secondary-tissue-m-the-inner-region-of-which-consists-of-fairly-thick-walled-elements-in-radial-series-passing-externally-into-the-thin-walled-cells-of-the-cambial-region-a-on-the-inner-edge-of-the-secretory-zone-sc-this-section-shows-also-the-interruption-fio-171-lepidodevdron-faliginosum-prom-sections-in-the-manchester-PG167R.jpg ". Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester Stock Photo")
. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/fossil-plants-for-students-of-botany-and-geology-paleobotany-xv-lepidodendron-151-the-longitudinal-section-168-c-shows-the-outer-edge-of-the-primary-xylem-x-abutting-on-a-band-of-dark-and-small-celled-parenchyma-which-passes-into-the-broad-zone-of-secondary-tissue-m-the-inner-region-of-which-consists-of-fairly-thick-walled-elements-in-radial-series-passing-externally-into-the-thin-walled-cells-of-the-cambial-region-a-on-the-inner-edge-of-the-secretory-zone-sc-this-section-shows-also-the-interruption-fio-171-lepidodevdron-faliginosum-prom-sections-in-the-manchester-image216385787.htmlRMPG167R–. Fossil plants : for students of botany and geology . Paleobotany. xv] LEPIDODENDRON 151 The longitudinal section (%. 168, C) shows the outer edge of the primary xylem, x, abutting on a band of dark and small- celled parenchyma which passes into the broad zone of secondary tissue, m, the inner region of which consists of fairly thick- walled elements in radial series passing externally into the thin-walled cells of the cambial region, a, on the inner edge of the secretory zone, sc. This section shows also the interruption. Fio. 171. Lepidodevdron faliginosum. (Prom sections in the Manchester
. A manual of botany. Botany. TISSUE SYSTEMS ;ir,;j meiismatic powers. This constitutes the cambium of the bundle (fig. 738, c). Its cells are usually elongated parenchyma with thin walls and granular protoplasm. By this merismatic layer the bast on the one side and the wood on the other are increased, so that the conjoint bundle grows both inwards and outwards. This fascicii.lar cambium is a primary meristem. Fir4. 7.S9.. Fiij. 739. Collateral bundle from stem of a Monocotylerloii. ph. Phloem. X, Xylem vessels, ^.j;. Protoxylem. p.p/t. Protophloem. Ihe bundle is surrounded by a small celled s Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-manual-of-botany-botany-tissue-systems-irj-meiismatic-powers-this-constitutes-the-cambium-of-the-bundle-fig-738-c-its-cells-are-usually-elongated-parenchyma-with-thin-walls-and-granular-protoplasm-by-this-merismatic-layer-the-bast-on-the-one-side-and-the-wood-on-the-other-are-increased-so-that-the-conjoint-bundle-grows-both-inwards-and-outwards-this-fasciciilar-cambium-is-a-primary-meristem-fir4-7s9-fiij-739-collateral-bundle-from-stem-of-a-monocotylerloii-ph-phloem-x-xylem-vessels-j-protoxylem-ppt-protophloem-ihe-bundle-is-surrounded-by-a-small-celled-s-image232376153.htmlRMRE1J49–. A manual of botany. Botany. TISSUE SYSTEMS ;ir,;j meiismatic powers. This constitutes the cambium of the bundle (fig. 738, c). Its cells are usually elongated parenchyma with thin walls and granular protoplasm. By this merismatic layer the bast on the one side and the wood on the other are increased, so that the conjoint bundle grows both inwards and outwards. This fascicii.lar cambium is a primary meristem. Fir4. 7.S9.. Fiij. 739. Collateral bundle from stem of a Monocotylerloii. ph. Phloem. X, Xylem vessels, ^.j;. Protoxylem. p.p/t. Protophloem. Ihe bundle is surrounded by a small celled s
. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/pharmaceutical-botany-botany-botany-medical-fig-6closed-bundle-of-stem-of-zea-mays-vg-bundle-sheath-l-inter-cellular-space-a-ring-from-an-annular-tracheal-tube-sp-spiral-tracheal-tube-m-pitted-vessels-v-sieve-tubes-s-companion-cells-cp-crushed-primary-sieve-tubes-f-thjn-walled-parenchyma-of-the-ground-or-fundamental-tissue-from-sayre-after-strasburger-fig-7transverse-section-of-a-concentric-bundle-from-the-rhizome-of-iris-xylem-surrounding-the-phloem-i-tracheae-t-protoxylem-s-sieve-tubes-g-companion-cells-of-the-internal-phloem-portion-from-sayre-af-image216418163.htmlRMPG2KG3–. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af
. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/pharmaceutical-botany-botany-botany-medical-fig-6closed-bundle-of-stem-of-zea-mays-vg-bundle-sheath-l-inter-cellular-space-a-ring-from-an-annular-tracheal-tube-sp-spiral-tracheal-tube-m-pitted-vessels-v-sieve-tubes-s-companion-cells-cp-crushed-primary-sieve-tubes-f-thjn-walled-parenchyma-of-the-ground-or-fundamental-tissue-from-sayre-after-strasburger-fig-7transverse-section-of-a-concentric-bundle-from-the-rhizome-of-iris-xylem-surrounding-the-phloem-i-tracheae-t-protoxylem-s-sieve-tubes-g-companion-cells-of-the-internal-phloem-portion-from-sayre-af-image232083752.htmlRMRDG95C–. Pharmaceutical botany. Botany; Botany, Medical. Fig. 6.—Closed bundle of stem of Zea mays. VG, Bundle sheath; L, inter- cellular space; A, ring from an annular tracheal tube; SP, spiral tracheal tube; M, pitted vessels; V, sieve tubes; S, companion cells; CP, crushed primary sieve tubes; F, thjn-walled parenchyma of the ground or fundamental tissue. {From Sayre after Strasburger.). Fig. 7.—Transverse section of a concentric bundle from the rhizome of Iris Xylem surrounding the phloem. I, Tracheae; t protoxylem; s, sieve tubes; g companion cells of the internal phloem portion. {From Sayre af
