Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 649
e activity being aslight enlargement, which is manifested in the rounding off of itsangles. This is followed by the putting forth of a tubular prolongation(fig. 462, B, a) of the internal cell-wall or endospore through an aper-ture in the outer spore-coat; and moisture being absorbed throughthis,… … Fig. 462.—Development of prothallium of Pteris serrulata: A, spore set free fromthe sporange; B, spore beginning to germinate, putting forth the tubular pro-longation a, from the principal cell b; C, first-formed linear series of cells; D, pro-thallium taking the form of a leaf-like expansion ; a,…
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