. Text-book of botany, morphological and physiological. Botany. FIG. 129.—Longitudinal section through the apical region of a branch of Clematis apiifolia; s apex of the stem; b b leaves; gg the first traces of spiral vessels, bending out uninterruptedly from the stem into the leaves. L-NJ FIG. 130.—Bulb of Muscari botryoides; one of the lower bulb-scales is thrown back, in order to show the numerous buds standing side by side in its axil. the formation of a branchlet results when the increase in length of the primary axis and the formation of its leaves ceases for a time and is subsequently r
. Text-book of botany, morphological and physiological. Botany. FIG. 129.—Longitudinal section through the apical region of a branch of Clematis apiifolia; s apex of the stem; b b leaves; gg the first traces of spiral vessels, bending out uninterruptedly from the stem into the leaves. L-NJ FIG. 130.—Bulb of Muscari botryoides; one of the lower bulb-scales is thrown back, in order to show the numerous buds standing side by side in its axil. the formation of a branchlet results when the increase in length of the primary axis and the formation of its leaves ceases for a time and is subsequently renewed, as in Abies, When the leaves stand in whorls, the number of the lateral branches may be equal to that of the members of the whorl, as in Equisetaceae, or smaller, as in Characeae. It is unusual for the number of branchlets to be larger than that of the leaves, but this occurs in some Angiosperms, where two or more lateral buds often arise side by side above a leaf (Fig. 130), or one above another, as in Ar'utolochia Sipho, Gleditschia, &c. In most Angiosperms the number of the lateral branchlets (with the exception of the flower-shoots) is, at first, the same as that of the leaves; but usually only a much smaller number continue to develope. (/3) The relationship in position and origin of leaves and branches is constant in each species and often in a whole class of plants. The lateral branches arise below the leaves (according to the acute investigations of Leitgeb2) probably in all Mosses, as well as in 1 [See Leitgeb, Bot. Zeit., 1872.] 2 Leitgeb, Beitrage znr Entwickelungsgeschichte der Pflanzenorgane, in Sitzungsber. der 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, 1849-1934. ed. and tr. Oxford, Clarendon press
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1882
