Pound and Clements : north American hyphomycetes. 727 



1. STILBUM Tode. Fung. Meckl. 1:10. 1790. 



Stipe erect, cylindrical, the fertile apices of the hyphae col- 

 lected into a dense globose, or capitate capitulum; hyaline, 

 strict, but not rigid; conidia simple, hyaline, globose to el- 

 lipsoid. 



The number of species reported for the United States is 29. 



2. ACTINICEPS B. & Br. Journ. Linn.' Soc. 15:85. PL 2. 



f. 3. 1877. 



Stipe as in Stilbum, but the capitulum composed of two sorts 

 of hyphae, the sterile terminating in stiff projecting, radiating 

 spicules, the fertile thin, branching, bearing the small globose, 

 or ellipsoid conidia. 



A small genus of but two species, one of which occurs in 

 this country. 



3. MARTINDALIA Sacc. & Ell. Miss. Myc. 2:16. 1884. 

 Stipe stilboid; capitulum composed of elongated spiral, 



nodulose sporophores; conidia globose, hyaline. 



Contains but a single species, reported for this country. 



4. CILICIOPODIUM Cord a. Sturm. DC. PI. III. 12:75. 

 Stipe erect, or ascending, composed of simple, or branched 



filaments, clavate-cylindrical, bright-colored; capitulum obso- 

 lescent; conidia acrogenous, hyaline, globose, or ellipsoid. 

 Two species of this genus are reported for the United States. 



5. ATRACTIUM Link. Berl. Mag. 3 : 10. 1809. 



Stipe cylindrical, erect, capitate; sporophores erect, typic- 

 ally single, parallel; capitulum obsolescent; conidia falcate, 

 hyaline, 2-pluriseptate. 



This genus contains but a single American representative. 



Subtribe Sporocybeae Fr. Surama Veg. Scand. 2:467. 1849. 

 Stroma fuscous, or dark-colored. 



6. SPOROCYBE Fr. Syst. Orb. Veg. 1 : 170. 1825. 



Stipe composed of rigid, erect, fuscous hyphae capitate 

 above; capitulum globose to turbiniform; conidia simple, fus- 

 cous, globose, or ellipsoid. 



Represented in the United States by 17 species. 



