An Introduction to Structural Botany Part Ii Flowerless Plants volume 2
An Introduction to Structural Botany Part Ii Flowerless Plants volume 2
Dukinfield Henry Scott
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At a later stage they play a part in the dissemination of the spores, as we shall see further on. In Pellia the elaters radiate from the base of the capsule, where they are attached to a mass of shorter cells, likewise spirally thickened. They extend from this part, upwards and outwards, passing between the mother-cells, which chiefly occupy the outer and upper part of the capsule (Fig. 55). Young elaters, with the spiral bands just beginning to form, are shown in Fig. 56, and nearly mature one...s are represented in Fig. 57 among the spores. The mother-cells of the spores, which are very numerous, are of a peculiar shape. At an early stage they become very deeply FIG. 55 -Young fruit of Pellia, in f our _i bed, the lobes being longitudinal section. It is enclosed within the calyptra. N, neck of tetrahedrally arranged, so fied40 Me (R. ; sf) f that only three are seen /, foot of sporogonium ; sp, spore in one plane (Fig. 56, sp). The lobes are connected in the middle by a quite narrow neck, in which the nucleus, which remains for a long time undivided, is situated.
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