. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. 700 THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. shoots at the apex of the plant (fig. 397''); these shoots are respectively male and female, and may occur on the same or on different plants. The antheridia are in the axils of the leaves of the male shoots, the archegonia in groups at the tips of the female shoots. The fertilized egg-cell develops into the sporogonium, the lower portion of which forms a large foot, whilst the upper part swells up into the spore-. Fig. 397 « Polyirichum commune; the spo
. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. 700 THE SUBDIVISIONS OF THE VEGETABLE KINGDOM. shoots at the apex of the plant (fig. 397''); these shoots are respectively male and female, and may occur on the same or on different plants. The antheridia are in the axils of the leaves of the male shoots, the archegonia in groups at the tips of the female shoots. The fertilized egg-cell develops into the sporogonium, the lower portion of which forms a large foot, whilst the upper part swells up into the spore-. Fig. 397 « Polyirichum commune; the spore-capsule to the left is concealed by the cap (calyptra), that to the right is exposed. 2 The same moss in an earlier stage of development. ^ Spore-capsule of Polytrichum commune with its lid. * The same after the falling away of the lid. 6 Brywm ccespiticium, 6 Spore-capsule of same with its calyptra. ? The same after removal of the calyptra. ^ xhe same after removal of the lid, showing the teeth (peristome). ^ A portion of the peristome, enlarged. - 10 Antheridia, archegonia, and paraphyses of Bryurn cxspiticium. n EylocomAum splendens. 12 Spore- capsule of same, is Andrecea rupestris with hurst spore-capsule. 1* Sphagnum cymbifoUum; the spore-capsules are still intact in the left-hand specimen, is A single capsule of the same. 1,2 6,11,14, natural size; s, «, «. f, s, 12, is, is x6; 9,10 X 150. capsule. The spore-layer in the latter has the form of a hemispherical shell. Ulti- mately the archegonium is burst irregularly by the enlarging sporogonium, and the .spores are set free by the removal of a circular lid at the summit. In SphagnvMi a true seta is not developed, the region between foot and capsule remaining quite short. The same result, however, is achieved by a considerable. 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 r
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1895
