. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—ASCOMVCETES. 243 his Peziza benesuada (Fig. 115); similar organs occupy the margin of the platter- shaped tube-bearing hymenia of Cenangium Frangulae, Tul. Small round cells incapable of germination, which will be noticed again in a subsequent page, are said by Brefeld * to be sometimes abscised from the ramifications of the paraphyses in Peziza Sclerotiorum. The second place where these doubtful' spermatia' occur is in the pycnidia of c
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—ASCOMVCETES. 243 his Peziza benesuada (Fig. 115); similar organs occupy the margin of the platter- shaped tube-bearing hymenia of Cenangium Frangulae, Tul. Small round cells incapable of germination, which will be noticed again in a subsequent page, are said by Brefeld * to be sometimes abscised from the ramifications of the paraphyses in Peziza Sclerotiorum. The second place where these doubtful' spermatia' occur is in the pycnidia of certain species, in which spores as well as spermatia are produced; such species, according to Tulasne, are Cenangium Fraxini, Tul., Dermatea carpinea, Fr., D. Coryli, Tul, D. dissepta, Tul., where the spermatia-forming hyphae also occupy chiefly the margin of the hymenium, also in D. amoena, Tul., Peziza arduen- nensis and Aglaospora. Thirdly, small short-lived cells, which do not germinate and may be compared with spermatia, are abscised in many species from filiform branchlets of the mycelium and from the germ-tubes, or even directly from the germinating spores. Brefeld^ found a multitude of such formations on the mycelium of artificially grown plants of Peziza (Sclerotinia) tuberosa. From short branches, often with tufts of branchlets as in Penicillium, are abjointed successively and serially at the extremities of their ramifications small cells, each containing a small sphere of a highly refringent perhaps fatty substance, and these are cemented together by a jelly and thus collected in heaps on the parent-filaments. Tulasne' found just such formations on the germ-tubes of the same species and on those of Peziza bolaris and P. Durieuana when the spores were sown in water. A similar phenomenon occurs sometimes on old cultures of the mycelium of P. Sclerotiorum, as Brefeld states and I can myself confirm ; but, as far as my experience goes, only in isolated cases which ca
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