. Text-book of botany, morphological and physiological. Botany. FlG. 297.—Adiantutn Capillus-Veneris; vertical longitudinal ;.—Adiantum Capillus-Veneris; the pro- section through the prothallium pp and the young Fern E; thallium pp seen from below with the young Fern k root-hairs, a archegonia of the prothallium, b the first leaf, attached to it; b its first leaf; -wf w" its first and 7v the first root of the young plant (X about 10). second roots; h root-hairs of the prothallium (x about 30). The mature Fern is, in some Hymenophyllacese, a small delicate plant, not much exceedi
. Text-book of botany, morphological and physiological. Botany. FlG. 297.—Adiantutn Capillus-Veneris; vertical longitudinal ;.—Adiantum Capillus-Veneris; the pro- section through the prothallium pp and the young Fern E; thallium pp seen from below with the young Fern k root-hairs, a archegonia of the prothallium, b the first leaf, attached to it; b its first leaf; -wf w" its first and 7v the first root of the young plant (X about 10). second roots; h root-hairs of the prothallium (x about 30). The mature Fern is, in some Hymenophyllacese, a small delicate plant, not much exceeding in dimensions the larger Muscinese; in other sections the fully grown plants attain the size of considerable shrubs; some species, natives of the Tropics and of the Southern Hemisphere, assume even a palm-like habit, and are called Tree-ferns. The stem creeps on or beneath the ground (as in Polypodium and Pieris aquilind), or climbs up rocks and stems; in some it ascends obliquely { Aspidium Filix-mas) \ in Tree-ferns it rises up vertically in the form of a column. The roots are usually very numerous; in Tree-ferns the stem is often entirely covered by a dense mantle of them. They arise on the stem in acro- petal succession; sometimes close to the growing apex of the stem (as in Pten's aquilina). When the internodes remain very short, and the stem is entirely covered with the bases of the leaves, the roots arise, as in Aspidium Filix-mas, from the leaf- stalks. In many Hymenophyllacese which have no true roots, branches of the stem assume a root-like structure. In creeping and climbing species the leaves are sepa- rated by distinct internodes which are sometimes very long; in thick, ascending,. 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 Sachs, Julius, 1832-1897; Vines, Sydney Howard, 1849-193
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1882
