. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. 74 ACEOGENOUS OE AOOTYLEDONOUS STEM. by their union, and the partial absorption of their transverse walls, form what are called cribriform or sieve-like vessels (vasa propria), thickened bast cells (6 p), and bast fibres {b /).. Fig. uo. In some Thallogens the thallus or frond is supported by a stalk, in which there are concentric parenchymatous circles, with divisions in the form of rays, but no vascular bundles. These appearances are presented by some large antarctic
. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. 74 ACEOGENOUS OE AOOTYLEDONOUS STEM. by their union, and the partial absorption of their transverse walls, form what are called cribriform or sieve-like vessels (vasa propria), thickened bast cells (6 p), and bast fibres {b /).. Fig. uo. In some Thallogens the thallus or frond is supported by a stalk, in which there are concentric parenchymatous circles, with divisions in the form of rays, but no vascular bundles. These appearances are presented by some large antarctic seaweeds (species of D'UrviUsea and Lessonia), and by some lichens, as Usnea. Fig. 140. Section of vascular bundle of stem of Bquisetum hyemale x 310. Lacuna or^a cavity, I; parenchyma, a form of starch cells, p p; large vessels, Iv; smaU vessels, sv; bast cells, & p; and bast fibres, b f; cribriform vessels, c v, formed by united cells, â with a partial absorption of their transverse walls.âTrams. Boi. Soc. 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 Balfour, John Hutton, 1808-1884. Edinburgh : A. and C. Black
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
