THE FUNGI WHICH CAUSE PLANT DISEASE 



451 



H. appendiculatum (Bui.) Karst. is perhaps parasitic, occurring 

 at the bases of hving trees. 



H. fasciculare (Huds.) Fr. is said to grow parasitically upon 



Fig. 319. — Hypoloma appendiculatum. After Clements. 



roots, causing a white rot. It is mentioned as a parasite on rasp- 

 berry roots in Austraha.^"'' 

 H. lateritium (Scha.) Schr. is also possibly parasitic on trees. 



Psilocybe Fries (p. 449) 



Pileus smooth, margin at first incurved; gills and spores at 

 length brownish or purplish; stipe cartilaginous, hollow or stuffed, 

 veil absent or rudimentary. 



About forty species. Fig. 320. 



P. spadicea (Scha.) Fr. is a weak wound parasite on various 

 woody plants. 



P. henningsii Jung, is said to be occasionally injurious to 

 winter grains ^°^ in Europe. 



