TREMELLA MYCETOPHILA 469 



to a parasitic fungus, he expressed the view that they were nothing 

 more than abnormal outgrowths of Collybia drijophila itself. " This 

 curious structure on Collybia dryophila," says he, " I no longer 

 regard as parasitic but, rather, as a teratological production of 

 C. dryophila, induced by protracted wet weather during development 

 of the fructification." 



In 1917 Boudier^ described Exobaddium mycefophilum from 

 specimens found near Nancy in France, and his illustration shows a 

 large, yellowish, almost globular, cerebriform excrescence covering 

 the top of the pileus of a Collybia dryophila and a similar but much 

 smaller excrescence protruding from the stipe. He states that the 

 conidia produced within the flesh are " numerous, minute, rounded 

 bodies, 1-2 /n in diameter " and that the basidia are " tetrasporous, 

 evidently connected with the hyphae of the Collybia, and bear ovate 

 spores similar to those of the Collybia but often somewhat larger." 



Boudier's interpretation of the excrescences is similar to that of 

 Burt ; for he holds that they are not the fruit-bodies of a parasitic 

 fungus, but rather " une modification pathologique due a une 

 production conidifere du Collybia." 



Also in 1917 C. G. Lloyd ^ published a note on the excrescences 

 of Collybia dryophila accompanied by a photographic illustration. 

 After stating Burt's view that Peck's Tremella mycetophila is nothing 

 more than a teratological outgrowth, he adds : " we do not claim 

 to know anything about what it really is. ... If Burt's theory is 

 correct it is an exceptional case. We have sometimes noted evident 

 teratological development of Agarics forming abortive pilei on top 

 of the normal pileus, like the celebrated Poria agaricicola that a 

 German savant discovered on an Amanita. But we think that there 

 is no other case where an Agaric habitually develops an entirely 

 different and constant fruiting form in addition to its normal gills." 



Some years ago, I myself found the supposed Exobasidinm 

 mycetophiluyn in a wood near Winnipeg ; but, thinking that there 

 would be no great difficulty in procuring it again, I examined 

 it only superficially and kept no record of my observations. 



^ E. Boudier, " Dernieres etincelles mycologiques," Bvll. Soc. Myc. France, 

 T XXXIII, 1917, pp. 13-14, Plate II, Fig. II. 



"^ C. G. Lloyd, Mycological Writings, Cincinnati, vol. v, No. 47, 1917, p. 662. 



