. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 56. Ascodesmis nigricans Van Tiegh.; sexual apparatus; a. trichogyne; b. antheridium; c. oogonium ; d. stalk; e. gametophytic hypha; after Claussen. ^'S* 57' Pyrone!?ia confluens; spherical oogo- nium giving rise to ascogenous hyphae; a, an- theridium; b. trichogyne; t. oogonium; </. as- cogenous hyphae; X 1040; after Claussen. the oogonium becomes septate, so that the fertile part is multicellular and the ascogenous hyphae arise from several cells. This type closely approxi- mates to that in Eurotium. and some other Plectascales,
. Fungi, ascomycetes, ustilaginales, uredinales. Fungi. Fig. 56. Ascodesmis nigricans Van Tiegh.; sexual apparatus; a. trichogyne; b. antheridium; c. oogonium ; d. stalk; e. gametophytic hypha; after Claussen. ^'S* 57' Pyrone!?ia confluens; spherical oogo- nium giving rise to ascogenous hyphae; a, an- theridium; b. trichogyne; t. oogonium; </. as- cogenous hyphae; X 1040; after Claussen. the oogonium becomes septate, so that the fertile part is multicellular and the ascogenous hyphae arise from several cells. This type closely approxi- mates to that in Eurotium. and some other Plectascales, and there seems reason to regard it as a primitive female organ among Discomycetes. From it may be derived the spherical oogonium of Pyronema (fig. 57) which differs mainly in the fact, no doubt connected with its shape, that it does not become septate after fertilization, so that the ascogenous hyphae arise from one cell only. The same is true of Lachnea stercorea, which. 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 Gwynne-Vaughan, Helen Charlotte Isabella (Fraser) Dame, 1879-. Cambridge [Eng] University Press
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922
