Introduction to the study of fungi : their organography, classification, and distribution for the use of collectors . ely large, fusi-form, and mostly threeor five septate. Someof them are, in likemanner, only the con-idia of some morehighly developed Fun-gus, and often a speciesof Nectria. The pus-tules are not so com-pact, sometimes effused,seldom with a determinate stroma, and rarely with the hyphaemuch developed. The genus altogether is much more variable than Tubercularia,and not so well con-stituted, so that pos-sibly it will be brokenup into more homo-geneous genera in thenear future. O
Introduction to the study of fungi : their organography, classification, and distribution for the use of collectors . ely large, fusi-form, and mostly threeor five septate. Someof them are, in likemanner, only the con-idia of some morehighly developed Fun-gus, and often a speciesof Nectria. The pus-tules are not so com-pact, sometimes effused,seldom with a determinate stroma, and rarely with the hyphaemuch developed. The genus altogether is much more variable than Tubercularia,and not so well con-stituted, so that pos-sibly it will be brokenup into more homo-geneous genera in thenear future. On thefaith of some obser-vations made by Mr,Worthington Smith,the conidia must beregarded as bodies ofa much higher order than their analogues in only are they capable of dividing at the joints, andeach segment vegetating as a separate unit, but these maybe converted into chlamydospores, or at least have a thickenedepispore, capable of hibernation. When this is confirmed itwill go far towards necessitating a revision of the classification,so far as an association with TiLbercuIaria is Fig. 134.—B, section of Tubercularia ; C, Chron. 288 INTRODUCTION TO THE STUDY OF FUNGI For the purposes of classification, the genera of the Tuber-culariae are grouped according to the general principles adoptedin the Mucedines and Deniatiaei, and in fact throughout theSaccardian system—that is to say, the sections are based on theseptation of the conidia, whether unicellular, bilocular, multi-cellular, or with stellate or helicoid forms. In each of thesections the genera are characterised by the features presentedby the sporodochium, or spore-bed, and the development of thegonidia, whether produced singly or in chains. There aresome forty-two genera in all, which it would be somewhattedious to describe in detail. The Tubereulariae Dematieae contain such genera as possessthe habit and development of Tuherculariae, but with colouredhyphae, and simila
Size: 2025px × 1234px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1895
