Hypocreacese 



Hypomyces. giving quality and completely transform its gills into a corrugated, 

 granular surface. 



Professor Peck, to whom I submitted the parasite, thinks it a new 

 species and calls it H. volemi. 



Further study of Hypomyces and its effect upon fungi, and of the 

 particular host-plants is desirable. 



H. lac'tifluorum (Schw.) Tulasne lac, milk; fltternm, flowing. 

 (Plate CXXXVI, fig. 5, p. 508.) Asci long and slender, sporidia in 

 one row, spindle-shaped, straight or slightly curved, rough, hyaline, 

 uniseptate, cuspidate-pointed at the ends, 3038x68^. 



The general appearance is much the same as that of H. aurantius 

 (Pers.) Tul., but the sporidia are larger, rough and warted, and the 

 felt-like mycelium is wanting. 



In the affected species of Lactarius the gills are entirely obliterated, 

 so that the hymenium of the agaric presents an even, orange-colored 

 surface on which the subglobose perithecia are thickly bedded, with 

 only their slightly prominent reddish ostiola visible. In decay the color 

 changes to a purplish-red. 



On Lactarius, especially L. piperatus. 



New Jersey, Ellis; Alabama, U. and E.; Minnesota, Arthur; Nova 

 Scotia, Dr. Somers; on various species of Lactarius, 1895, Ala. Bull. ; 

 South Carolina, Ravenel; Pennsylvania, Everhart. 



West Virginia, 1881-1882; Haddonfield, N. J., Mt. Gretna, Pa., 

 August to October. Mcllvaine. 



This fungus puzzled me for many years. August, 1896, I sent sev- 

 eral specimens to Professor Peck of different colors orange, red, whitish 

 and purple. 



Professor Peck kindly identified the specimens and wrote : "In one 

 the matrix of the host-plant has not been so completely changed or 

 transformed as in the other. It would be interesting to know what 

 species of Lactarius it is that Hypomyces attacks. I have never been 

 able to ascertain, and have sometimes thought it might be Cantharellus 

 cibarius, but this specimen of yours indicates, rather, a Lactarius." 



Of the purple specimen he wrote: " This is a beautiful thing, and 

 as I find nothing like it described I have given it a name Hypomyces 

 purpureus Peck." 



Well cooked, in small pieces, it is one of the very best. 



562 



