. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 299 leafy hepatics, the former organs appearing as stalked bodies in the axils of the leaves on short cone-like branches and the archegonia originate on the tips of short branches. The gameto- spore germinates very much as in Anthoceros (Fig. 203, 6). It does not, however, have as prolonged a growth, and at ma-. FiG. 203. The sporophyte of Sphagnum: 6, the young sporophyte sepa- rated from the archegonium with essentially the same differentiation of parts as noted in Anthoceros, Fig. 199. 5^, diagram of a later development of th
. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 299 leafy hepatics, the former organs appearing as stalked bodies in the axils of the leaves on short cone-like branches and the archegonia originate on the tips of short branches. The gameto- spore germinates very much as in Anthoceros (Fig. 203, 6). It does not, however, have as prolonged a growth, and at ma-. FiG. 203. The sporophyte of Sphagnum: 6, the young sporophyte sepa- rated from the archegonium with essentially the same differentiation of parts as noted in Anthoceros, Fig. 199. 5^, diagram of a later development of the sporophyte in the archegonium. The enlarged foot, &, is embedded in the apex of the moss branch, p, and the spores, sp, form a dome-shaped layer in the upper part of the capsule. 5, the naked stem, p, of the moss branch, surrounded at base with spirally arranged leaves, has elongated, lifting the mature sporophyte into the air. The enlargement of the stem, 6, is due to the growth of the foot region of the sporophyte; ca, remains of the ruptured archegonium or calyptra; 0, lid or operculum of the capsule. —After Schimper. turity consists of a well-developed foot embedded in the tissues of the gametophyte and a spore-bearing capsule (Fig. 203, 5^). The stomata and chlorenchyma which were so conspicuous in Anthoceros are less perfectly represented, but the spore mother cells are still developed in a dome-shaped zone. This rather minute sporophyte at maturity barely breaks through the arche- gonium, known in this condition as the calyptra, which covers the capsule as a cap. The absence of a conspicuous stalk or seta. 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 Curtis, Carlton Clarence, 1864-1945. New York, H. Holt
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