76 Mycologia 



5. Hypomyces chrysospermus (Bull.) Tul. Ann. Sci. Nat. IV. 



13: 16. 1855 

 Reticularia chrysosperma Bull. Herb. France pi. 476, f. 4. 1789. 

 Mucor chrysospermus Bull. Hist. Champ, i : 99. 1809. 

 Uredo mycophila Pers. Obs. Myc. 16. 1796. 

 Sepedonium chrysospermuni Fries, Syst. Myc. 3: 438. 1829. 

 Hypomyces holetinus Peck, Bull. N. Y. State Mus. 75: 15. 1905. 



Conidial phase consisting of a golden or lemon-yellow powdery 

 mass which covers the substratum often for several cm.; conidia 

 globose, golden-yellow, beautifully but delicately echinulate, 

 15-18 mic. in diameter; perithecia gregarious or thickly crowded, 

 nestling in the yellow subiculum, reddish or reddish-brown; 

 asci cylindrical, 8-spored ; spores i-seriate with the ends over- 

 lapping in the ascus, fusiform, mostly curved, and becoming when 

 mature slightly rough, i-septate, with the septum near one end, 

 dividing the spore into two unequal cells with the short cell 

 toward the base, 12-15 X 4 mic. {pi. 21, f. 16). 



On species of Boletus. 



Type locality: France. 



Distribution : New York to Connecticut and Virginia. 



Illustrations: Bull. Herb. France pi. 4/6, f. 4; Tul. Fung. 

 Carp. 3 : pi 8, f. 1-13. 



Specimens examined: Connecticut, Biirlingham; New York, 

 Peck (type of H. boletinus) , Seaver, Galloway; Virginia, Murrill. 



Species very distinct with its bright yellow conidia and dark 

 reddish perithecia. The spores in American forms examined are 

 smaller than usually indicated for European specimens, however, 

 as the spores are quite variable in size and other characters con- 

 form well it is likely that the American and European specimens 

 are identical. 



6. Hypomyces aureo-nitens Tul. Fung. Carp. 3 : 64. 1865 



Stroma effused, thin, bright golden or lemon-yellow over- 

 spreading the host often for a distance of 2 cm. ; perithecia 

 seated in the stroma, very much exscrted or subsuperficial, 

 thickly gregarious, often crowded, darker in color than the 

 subiculum, ovate; asci cylindrical, 8-spored; spores i-seriate with 

 the ends overlapping, fusiform with the ends sharply pointed, 

 i-septate, with the septum medial, slightly constricted, 15-18 X 4 

 mic. (pi. 21, f. 19). 



