. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 204 INTRODUCTION TO THE STUDY OF FUNGI that some of the species of Nectria have an early stage in which the stroma develops only conidia without perithecia, and that these conidial forms were in earlier times regarded as autonomous moulds of the genus Later on perithecia appear upon the old stroma, which contain asci and sporidia (Fig. 94). There are a few species which resemble, when mature, in external appearance certain species of Nectria or Dialonectr
. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 204 INTRODUCTION TO THE STUDY OF FUNGI that some of the species of Nectria have an early stage in which the stroma develops only conidia without perithecia, and that these conidial forms were in earlier times regarded as autonomous moulds of the genus Later on perithecia appear upon the old stroma, which contain asci and sporidia (Fig. 94). There are a few species which resemble, when mature, in external appearance certain species of Nectria or Dialonectria, but are accompanied. Fig. 94.—D, Tuberculoma with Nectria; B, Nectria, F, section of stroma; 6, asci and sporidia, Oard. Chron. by capitate conidial forms which are not to be distinguished from species of the Hypho- mycetal genus Stilbum. Such species of the Nectrieae are associated under the genus Sphaerostilbe. Other species, formerly united with Nectria, have the perithecia seated upon a more or less byssoid subiculum; these are now separated from that genus, and united under the name of Byssonectria, analogous to the Byssosphaeria of the Sphaeriaceae. In another group, the perithecia, which resemble Nectria, are densely gregarious, and often partially immersed in a velvety subiculum, transformed from the tissues of decaying Fungi. This genus is Hypomyces, each species of which has also a conidial form, which precedes the ascigerous, and corresponds to some genus of the Mucedineae. Some of the species of Nectria and Dialonectria also have conidial forms, which would be referable to the Hyphomycetal genus Fusarium. In these instances we must recognise the relationship between the Hyphomyceteae and the Ascomyceteae, but it would be assuming too much to infer, from a few examples, that all the species of Stilbum, are conidia of Sphaerostilbe, or Tubercularia of Nectria, Isaria of Cordyceps, 1 See Gardener's Chronicle, 28th Jan. Please note that these images are ext
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