330 



Mycologia 



Habitat: On dead coniferous wood. Eldora Lake, Colorado, 

 August, 191 5. 



It is with great hesitation that I describe this form as a new 

 species. Miss Lister states, in correspondence, that the aethalia 

 of Enteridium olivaceum are frequently very small, but the 

 spores of that species are always olive in the mass, in sharp con- 

 trast with the yellow color seen in the form under discussion; 

 apparently also, they are always united in large clusters. The 

 inner structure of the aethalia of E. minutum is in some cases 

 almost exactly that of typical Enteridium; in others it more nearly 

 resembles the capillitium of Liceopsis; yet the aethalia show every 

 indication of having developed normally to maturity. On the 

 whole, it has seemed best to record this form now, in the event 

 of further gatherings being made which may throw additional 

 light upon it. 



Hemitrichia leiocarpa (Cke.) List. About two years ago 

 Mr. Bilgram of Philadelphia sent me a specimen which bore a 

 certain resemblance to a long-stalked form of Arcyria cinerea. 

 Upon closer examination, however, it proved to be Hemitrichia 

 leiocarpa. It is in all respects typical and appears to differ quite 

 markedly from H. clavata in color and in the small size of the 

 spores. An interesting feature of the gathering, to which Miss 

 Lister called my attention, is seen in the right-handed spirals on 

 the capillitial threads ; while in H. clavata the spirals are left- 

 handed. Miss Lister further states, in correspondence, that in 

 the type specimen of H. leiocarpa from Maine, as well as in a 

 specimen collected by Professor Balfour in the Edinburgh Botanic 

 Gardens, the spirals are right-handed, while in the type of H. 

 Varneyi Rex, which is supposed to be identical with H. leiocarpa, 

 the spirals are left-handed, as in H. clavata, and she suggests that 

 the direction of the spirals may be diagnostic. In my opinion 

 this is probably not the case. It is not unusual in the case of 

 Arcyria globosa, for example, to find specimens in which the 

 minute spines on the threads are arranged in a right-handed 

 spiral, though normally the arrangement is left-handed, as noted 

 by Miss Lister (Mon. Mycet. Ed. 2, p. 238). Such is the case 

 in the specimen distributed by Ellis & Everhart in N. Am. Fungi 

 1116. If the spirals in H. leiocarpa may be either right-handed 



