. The classification of flowering plants. Plants. V] GRAMINEAE 223 the sheath-node occurs in the Agrostideae, Aveneae, Festuceae and Triticeae, to which most of our temperate genera belong. The function of the nodes is to raise again culms which have become bent down. They are composed largely of highly turgescent parenchyma, the cells of which elongate on the side next the earth when the culm is placed in a horizontal or oblique position. The rigidity of the culm is due to the great development of sclerenchyma, a ring of which lies close beneath the epidermis, while strands of it accompany or
. The classification of flowering plants. Plants. V] GRAMINEAE 223 the sheath-node occurs in the Agrostideae, Aveneae, Festuceae and Triticeae, to which most of our temperate genera belong. The function of the nodes is to raise again culms which have become bent down. They are composed largely of highly turgescent parenchyma, the cells of which elongate on the side next the earth when the culm is placed in a horizontal or oblique position. The rigidity of the culm is due to the great development of sclerenchyma, a ring of which lies close beneath the epidermis, while strands of it accompany or surround the vascular bundles. The leaves are usually alternate and distichous, the lower ones often crowded, forming a basal tuft. The first leaf of. Fig. 89. Poa trivialis. A, base of blade. B, ligule. C, sbeatb. D, culm. X about 3. From 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 Rendle, A. B. (Alfred Barton), 1865-1938. Cambridge, University press
Size: 1042px × 2398px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
