Acicular leaf Stock Photos and Images

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Acicular leaf Stock Photos and Images

Japanese White Pine (Pinus parviflora 'Glauca'). Twig Detali Closeup Stock Photo

RF2RC31MR–Japanese White Pine (Pinus parviflora 'Glauca'). Twig Detali Closeup

Mountain Pine (Pinus mugo). Mature Seed Cone Closeup Stock Photo

RF2PJ53YB–Mountain Pine (Pinus mugo). Mature Seed Cone Closeup

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. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. Fig. 152. Fig. 153. Fig. 149. Fig. 150. Fig. 151. relation between the length and the breadth of the leaf. When the leaf is extremely narrow in comparison with its length, as in the Pine, it is acicular or needle-shaped (J^'ig. 145). As the width increases, we pass through the forms known as linear, oblong, oval, and finally orhicidar, in which the width and length are nearly or quite equal (Fig Stock Photo

RMRJ2DJP–. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. Fig. 152. Fig. 153. Fig. 149. Fig. 150. Fig. 151. relation between the length and the breadth of the leaf. When the leaf is extremely narrow in comparison with its length, as in the Pine, it is acicular or needle-shaped (J^'ig. 145). As the width increases, we pass through the forms known as linear, oblong, oval, and finally orhicidar, in which the width and length are nearly or quite equal (Fig

Mountain Pine (Pinus mugo). Immature Seed Cone Closeup Stock Photo

RF2PJ53YG–Mountain Pine (Pinus mugo). Immature Seed Cone Closeup

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. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. Fig. 152. Fig. 153. Fig. 149. Fig. IBO. Fig. 161. i^elation between the length and the breadth of the leaf. fWhen the leaf is extremely narrow in comparison with its length, as in the Pine, it is acicular or needle-shaped (Fig. 145). As the width increases, we pass-through the forms known as linear, oblong, oval, and finally orbicular, in which the width and length are nearly or quite equal (Fig. 146).. Fig. 1B4. 173. In the second class the dififerent forms arise fro Stock Photo

RMRE1FE0–. The elements of structural botany with special reference to the study of Canadian plants ... Plant physiology; Plant anatomy. Fig. 152. Fig. 153. Fig. 149. Fig. IBO. Fig. 161. i^elation between the length and the breadth of the leaf. fWhen the leaf is extremely narrow in comparison with its length, as in the Pine, it is acicular or needle-shaped (Fig. 145). As the width increases, we pass-through the forms known as linear, oblong, oval, and finally orbicular, in which the width and length are nearly or quite equal (Fig. 146).. Fig. 1B4. 173. In the second class the dififerent forms arise fro

Mountain Pine (Pinus mugo). Long Shoot and Pollen Cones Closeup Stock Photo

RF2PJ53XY–Mountain Pine (Pinus mugo). Long Shoot and Pollen Cones Closeup

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$. Studies on the vegetation of the Transcaspian lowlands. Botany. - 251 — the plant the leaves become narrower with the spine longer; the uppermost leaves as well as the leaves of the rosettes are sessile and acicular as in the previous species. The leaf is not ribbed as in A. minus but the structure of the green tissue is almost the same. The veins have a thick bast-. Fig. 73. Agriophyllum minus. A, Transverse section of leaf, sliowing the distribution of sclerenchyma (black), palisades (striped) and veins (N). B, Detail of ^; N, Veins {A, X 53; 5, X 203). sheath and a strand of bast runs alo Stock Photo$

RMRDRD9M–. Studies on the vegetation of the Transcaspian lowlands. Botany. - 251 — the plant the leaves become narrower with the spine longer; the uppermost leaves as well as the leaves of the rosettes are sessile and acicular as in the previous species. The leaf is not ribbed as in A. minus but the structure of the green tissue is almost the same. The veins have a thick bast-. Fig. 73. Agriophyllum minus. A, Transverse section of leaf, sliowing the distribution of sclerenchyma (black), palisades (striped) and veins (N). B, Detail of ^; N, Veins {A, X 53; 5, X 203). sheath and a strand of bast runs alo

Mountain Pine (Pinus mugo). Long Shoot Detail Closeup Stock Photo

RF2PJ53YR–Mountain Pine (Pinus mugo). Long Shoot Detail Closeup

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$. Studies in fossil botany . Paleobotany. 38 STUDIES IN FOSSIL BOTANY classes of Pteridophyta will be emphasised in later chapters. 5- The Leaves.—The leaves of the Calamarieae were in all cases arranged in whorls, and were usually of a simple acicular or lanceolate form, though in the genus Archaeocalamites they were forked (Figs. 30, 31). It is often stated that the leaves of the Palaeozoic Equisetales differed from those of their later successors in being. Fig. 12.—Catamites, sp. Transverse fracture through a node, showing leaf-sheath and free tips of leaves, each with its vein. Commissural Stock Photo$

RMRDC848–. Studies in fossil botany . Paleobotany. 38 STUDIES IN FOSSIL BOTANY classes of Pteridophyta will be emphasised in later chapters. 5- The Leaves.—The leaves of the Calamarieae were in all cases arranged in whorls, and were usually of a simple acicular or lanceolate form, though in the genus Archaeocalamites they were forked (Figs. 30, 31). It is often stated that the leaves of the Palaeozoic Equisetales differed from those of their later successors in being. Fig. 12.—Catamites, sp. Transverse fracture through a node, showing leaf-sheath and free tips of leaves, each with its vein. Commissural

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. Studies in fossil botany . Paleobotany. i6o STUDIES IN FOSSIL BOTANY L. esnostense the leaves were acicular, and not very different in form from those of some species of Pinus. Along the under surface, on either side of the midrib, are two furrows, which are very deep near the base. Fig. 64.—Lepidodendron Hickii Transverse section of leaf v.b., vascular bundle ; some of the large elements round it constitute the transfusion-tissue ; /, furrows in which the stomata are placed. X 60. S. Coll. 51. (G. T. G.) of the lamina, but become less marked towards the apex. It is on the epidermis lining t Stock Photo

RMRDC7P9–. Studies in fossil botany . Paleobotany. i6o STUDIES IN FOSSIL BOTANY L. esnostense the leaves were acicular, and not very different in form from those of some species of Pinus. Along the under surface, on either side of the midrib, are two furrows, which are very deep near the base. Fig. 64.—Lepidodendron Hickii Transverse section of leaf v.b., vascular bundle ; some of the large elements round it constitute the transfusion-tissue ; /, furrows in which the stomata are placed. X 60. S. Coll. 51. (G. T. G.) of the lamina, but become less marked towards the apex. It is on the epidermis lining t

A view on the dense forest in the mist Stock Photo

RFA34WR1–A view on the dense forest in the mist

. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 6o POLEMONIACEAE. Vol.111. Flowers in dense or capitate cymes, or heads; flower-clusters leafy-bracted. Perennial; corolla-tube not longer than the calyx. 5. G. ibcriilifolia. Annual; corolla-tube 2-3 times as long as the calyx. 6. (V. piuuilu. Corolla rotate; leaf-segments acicular. 7. G. accrosa. i. Gilia longiflora (Torr.) Don. White-flowered Gilia. Fig. 347 Stock Photo

RMRDKCAT–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 6o POLEMONIACEAE. Vol.111. Flowers in dense or capitate cymes, or heads; flower-clusters leafy-bracted. Perennial; corolla-tube not longer than the calyx. 5. G. ibcriilifolia. Annual; corolla-tube 2-3 times as long as the calyx. 6. (V. piuuilu. Corolla rotate; leaf-segments acicular. 7. G. accrosa. i. Gilia longiflora (Torr.) Don. White-flowered Gilia. Fig. 347

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. The elements of vegetable histology. Plant anatomy. /7I <» F^ A V. Plate 53.—Cell Contents. 1. Acicular crystals, single and in raphides, Sarsaparilla root. 2. Prismatic crystals, Orris root. 3. Acicular crystals, Squill, 4. Prismatic crystals, Prunus bark. 5. Cubical crystals, Senna leaf. 6. Cryptocrystalline crystals, Belladonna root. 7. Rosette crystals, Euonymus bark.. 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. Stock Photo

RMRDWJ0P–. The elements of vegetable histology. Plant anatomy. /7I <» F^ A V. Plate 53.—Cell Contents. 1. Acicular crystals, single and in raphides, Sarsaparilla root. 2. Prismatic crystals, Orris root. 3. Acicular crystals, Squill, 4. Prismatic crystals, Prunus bark. 5. Cubical crystals, Senna leaf. 6. Cryptocrystalline crystals, Belladonna root. 7. Rosette crystals, Euonymus bark.. 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.

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. Fossil plants : for students of botany and geology . Paleobotany. 216 LYCOPODIALES [CH. species, from the Coal-field of Valenciennes, the pedicel bore acicular leaves or bracts attached to the upper portion of leaf- cushions arranged in vertical series (fig. E). The cones reached a length of 16 cm. and a breadth of 2'5—5 cm.; the sporophylls are borne in alternating verticils with 8—10 in each whorl. Several megaspores (2 mm. in diameter) appear to have been produced in tetrads in each sporangium.. Fig. 201. Sigillariostrohus. A, C. Sigillariostrohus rhombibracteatus Kidst. (After Kidston.) Stock Photo

RMRDBBWE–. Fossil plants : for students of botany and geology . Paleobotany. 216 LYCOPODIALES [CH. species, from the Coal-field of Valenciennes, the pedicel bore acicular leaves or bracts attached to the upper portion of leaf- cushions arranged in vertical series (fig. E). The cones reached a length of 16 cm. and a breadth of 2'5—5 cm.; the sporophylls are borne in alternating verticils with 8—10 in each whorl. Several megaspores (2 mm. in diameter) appear to have been produced in tetrads in each sporangium.. Fig. 201. Sigillariostrohus. A, C. Sigillariostrohus rhombibracteatus Kidst. (After Kidston.)