. A manual of Indian botany. Botany. 32 MORPHOLOGY ticum), &c. Ranunculacece and Dilleiiiacecs (chalta) have often sheathing leaves. The majority of the leaves, however, have only the blade and the petiole, and not the sheath (fig. 28). A small minority have the blade only, and neither the petiole nor the sheath. 'In Grasses the leaves have usually blade and sheath, but no petiole, or hardly any. Leaves with petiole are called petiolate, and leaves without petiole Apex Leaf Blade Veins Petiole. Midrib Axil Node SESSILE. In fact, the word sessile is used to designate all structures that are
. A manual of Indian botany. Botany. 32 MORPHOLOGY ticum), &c. Ranunculacece and Dilleiiiacecs (chalta) have often sheathing leaves. The majority of the leaves, however, have only the blade and the petiole, and not the sheath (fig. 28). A small minority have the blade only, and neither the petiole nor the sheath. 'In Grasses the leaves have usually blade and sheath, but no petiole, or hardly any. Leaves with petiole are called petiolate, and leaves without petiole Apex Leaf Blade Veins Petiole. Midrib Axil Node SESSILE. In fact, the word sessile is used to designate all structures that are not provided with a stalk. Leaves with a very short petiole are* often described as SUBSESSILE or SUB- PETIOLATE. It should, however, be remem- bered that leaves that have no petiole, but a sheath, as those of most Grasses, are not ses- sile, because in such cases the blades are not inserted directly on the stem, as the blades of true sessile leaves are. A leaf-blade, which for convenience is often desig- nated shortly as a leaf, should be examined with re- gard to its form, margin, apex, base, venation, sur- face, and consistency. The form may be described in ordinary English, but it would be more convenient to use the following technical terms, namely: (i) orbi- cular (fig. 29) or round, as in padma {Nelumbium); (2) LINEAR or long, as in most Grasses; (3) lanceo- late or lance-shaped, as in Bamboo; (4) ellip- Fig. -Diagram to Illustrate Parts of a Leaf. 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 Bose, G. C. London, Blackie & Son Ltd.
Size: 1265px × 1974px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1920
