814 



INTRODUCTION TO CIIYPTOGAMIC BOTANY. 



5. ISARIEI, Fr. 



Common receptacle or stem compound. Spores terminating 

 the threads or cells, pulverulent. 



335. An approach to these characters was made by Epicoc- 

 cum and Cheiroinyces, while Stilhum already shadowed out 

 some of the clavate Hymenomycetes. The last tribe of 

 Hyphomycetes approximates, in Anthina and Ceratium, still 

 more closely to Hymenomycetes. It is, in fact, difficult to say 

 in what these genera and Pterula differ from them except in 

 being less compact, though Isaria is more decidedly muce- 

 dinous in its aspect. There is some doubt, however, as to the 

 autonomy of the species which grow on insects, and the same 

 may be said of some other species. 



Fig. 71. 



a. Podosporium rigidum, Schwein. Magnified. From specimens com- 

 municated by Eev. M. A. Curtis, from South Carolina. 



h. Pleurohotrya Indica, Berk. Magnified. Gathered at Secun- 

 derabad ou grass, with Sphceria Graminis, by Lieutenant E. S. 

 Berkeley. 



c. Staclujlidium diffusum, showing the early stage of the fertile head, 

 with seven spicules, of which five only are visible. In the upj^er figure 

 these spicules are forked, to make two fertile cysts. The third figure 

 represents three fertile cysts covered with obtuse processes, one or two 

 of which bear spores. 



336. Several genera which find their proper place in this 

 highest group, and the last, are, in fact, compound forms of 

 organisms which appeared under other tribes. Thus^ Gra- 



