. The structure and development of mosses and ferns (Archegoniatae). Fig. 79.—Dendroceros Breutelii. A, section of young sporophyte, X2S0; B, section ofmature sporophyte showing spores and elater-like, sterile cells; C, single elater,X2S0. plant that Leitgeb ((7), v., p. 39) based his theory of the closerelationship of the Anthocerotes and Jungermanniales. Allof Leitgebs observations on the young capsule were made fromherbarium material, and, as he himself admits, were in all casesembryos that had not fully developed. The writer has madea very complete examination of the commonest American spe
. The structure and development of mosses and ferns (Archegoniatae). Fig. 79.—Dendroceros Breutelii. A, section of young sporophyte, X2S0; B, section ofmature sporophyte showing spores and elater-like, sterile cells; C, single elater,X2S0. plant that Leitgeb ((7), v., p. 39) based his theory of the closerelationship of the Anthocerotes and Jungermanniales. Allof Leitgebs observations on the young capsule were made fromherbarium material, and, as he himself admits, were in all casesembryos that had not fully developed. The writer has madea very complete examination of the commonest American spe-cies, N. orbicularis (valvata), and the results of the study of thedevelopment of the sporogonium differ so much from those ofLeitgeb that they will be given somewhat in detail. Mottier IV. THE ANTIIOCEROTES 149 (2) has also studied this species, and his results agree entirelywith those of the writer. The thallus much resembles a small Antlioccros, and sec-tions through it show that in its growth and the developmentand structure of the sexual organs there is cl
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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
