Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 80. Ascophanus carneus Pers.; eld archicarp,showing associated nuclei, > Soo; alter Ramlow. formed so that the hypha consists of a series of binucleate cells. These. tig. Si. Ascophanuscarneiis Pers.; a. section through young asci (ring nuclear fusion in two cells of the archicarp, =so : . two cells of an archicarp,showing nuclear fusions, x 1240; after Cutting. nuclei, when satisfactorily fixed, showed a well-marked centrosome.Ramlow was unable to see whether one or several cells of the archicarp 120 DISCOMYCETES [CH. gave rise to ascoge
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Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 80. Ascophanus carneus Pers.; eld archicarp, showing associated nuclei, > Soo; alter Ramlow. formed so that the hypha consists of a series of binucleate cells. These. tig. Si. Ascophanuscarneiis Pers.; a. section through young asci (ring nuclear fusion in two cells of the archicarp, =so : . two cells of an archicarp, showing nuclear fusions, x 1240; after Cutting. nuclei, when satisfactorily fixed, showed a well-marked centrosome.Ramlow was unable to see whether one or several cells of the archicarp 120 DISCOMYCETES [CH. gave rise to ascogenous hyphae ; an investigation sufficiently searching todetermine this point might have led to the recognition of nuclear fusionsin normal material. The ascospore has a single large nucleus, and gives rise to multi-nucleate germ-tubes in which Ramlows figures show numerous nuclei inpairs (fig. 16). In Ascophanus ochraceus Dangeard describes eight to fifteen oogonia astaking part in the formation of a single fruit. These, it would appear, areall borne upon the same hypha ; they may arise from adjacent cells, andindeed sometimes open into one another, so that the whole series seemsequivalent to the oogonial region o