Seaver: Hypocreales of North America 69 



hyaline or subhyaline, granular within, nucleate or pseudoseptate, 

 15-25 X4-5 mic. (mostly 15-20 X 4-5 mic.) {pi. 21, f. 5). 



On different species of gill fungi, especially Lactariae. 



Type locality : Europe. 



Distribution : Vermont to Alabama. 



Illustrations : Tul. Fung. Carp. 2 : pi. 50, /. 5. 



Specimens examined: Alabama, Earle; Connecticut, Earle, 

 Tha.vter; N. Jersey, Ellis; Pennsylvania, Everhart; Vermont, 

 Bnrlingham. 



While this species is usually described as having i-septate 

 spores, there seems to be much dift"erence of opinion on this 

 point. Maire* states that he had described Hypomyces Vuille- 

 minianus believing it to differ from Hypomyces lateritius in the 

 absence of the septum of the spores. Having later collected the 

 species commonly and finding the spores to be always non-septate, 

 he began to suspect that the description of Hypomyces lateritius 

 by Tulasnef was incorrect. This suspicion was later confirmed 

 by the examination of the original specimen sent from the 

 Museum of Paris. He therefore reunites Hypomyces Vuille- 

 minianus Maire and Hypomyces lateritiiis (Fries) Tulasne and 

 states that the spores are verrucose and non-septate. The differ- 

 ence of opinion as to the presence of the septum in the spores 

 of this species seems to be due to the fact that the spore contents 

 often separates toward either end giving a septate appearance. 



Hypomyces zwlemi was described by Dr. Peck on Lactaria 

 volema and the spores indicated as fusiform, 12-15 X 4 mic, 

 and commonly 2-nucleate. I have examined the type of this 

 species and can discover no character on which to separate it. 



Peckiella hymenioides was described by the same author on 

 Lactaria uvida and the spores described as simple, subfusiform, 

 pointed or acute at each end, 12-15 X 4-5 mic. Cotype material 

 of this species in good condition has been studied and I find that 

 it conforms in every detail with European material which has 

 been distributed under the name of Hypomyces lateritius (Fries) 

 Tul. 



Since making the above notes I have been permitted to examine 



* Ann. Myc. 4: 331. 1906. 

 t Fung. Carp. 3: 63. 1865. 



