. Botany of the living plant. Botany; Plants. Fig. 449. Outlines of the xylem of Coenopterid steles, all drawn to the same scale, to show their relative sizes ( x 5). 1 = Botryopteris cylindrica. 2=Ankyropteris Grayi. 3=ditto, larger. 4=Asterochlaena laxa. The elaborateness of outline increases with the size. conducting tissues of plants of primary construction. In the fossil Fern Botryopteris the small protostele is cylindrical (Fig. 375), and circular in transverse section. But in those of larger size its section is stellate, with projecting flanges, the surfaces between them. Please note th
. Botany of the living plant. Botany; Plants. Fig. 449. Outlines of the xylem of Coenopterid steles, all drawn to the same scale, to show their relative sizes ( x 5). 1 = Botryopteris cylindrica. 2=Ankyropteris Grayi. 3=ditto, larger. 4=Asterochlaena laxa. The elaborateness of outline increases with the size. conducting tissues of plants of primary construction. In the fossil Fern Botryopteris the small protostele is cylindrical (Fig. 375), and circular in transverse section. But in those of larger size its section is stellate, with projecting flanges, the surfaces between them. 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 Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. , ltd.
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