WEST VIRGINIA GEOLOGICAL SURVEY 37 



CLASTEROSPORIUM Sz. 

 C. CORNUTUM E. & E., Field Mus. Bot., 1:92 (1896). 



TYPE HABITAT: On decaying wood, Oct. 21, 1895 (Nutt- 

 all, discov. 1883). 



Hyphse prostrate, septate, branched, brown, about 6 ,u 

 diameter, effused in black velvety patches I to 2 cm. across. 

 Conidia in pairs or threes, horn-shaped, 10 to 14 septate. 100 

 to 225 x 14 /*, broadest below, gradually tapering above to 

 an obtuse point, curving outward at the base, rising and 

 spreading out above like the horns of an ox. The conidia 

 are but slightly constricted at the septa and are sessile on 

 the hyphse, appearing at first as a simple nodule or tubercle 

 on the side of the thread. 



Allied to C. Hirudo Sacc., but that has solitary multisep- 

 tate (55 to 65) conidia and evanescent hyphse. 

 C. SIGMOIDEUM E. & E., Bull. Torr. Club, 24:472 (1897). 



Hyphse effused, crooked, septate at intervals of about 15 /*, 

 forming an olive-black stratum on the bark for many cm. 

 in extent, subcespitose, 300-400 x (6-7 /x ; conidia broad-fusoid, 

 sigmoid (ends curved in opposite directions), 4 (excep- 

 tionally 5) septate and slightly constricted at the septa, in- 

 termediate cells brown, end cells hyaline, 40-70 x 12-15 /* 

 mostly subtruncate above. 



On dead limbs of Castanea. Fayette, near Nuttallburg, 

 March, 1896 (Nuttall, 819). 



HELMINTHOSPORIUM Link. 



H. PERSISTENS Cooke. 



On branches of Acer in pine woods, alt. 2,000 ft., March 

 9, 1894. Conidia 75 to 150 x 10 to 15/1, (Nuttall, 1421, 392). 

 H. MACROCARPON Grev. 



On decorticated limbs Platanus occidcntalis. Oct. 6, 1895 

 (Nuttall, 1887). On Magnolia Fraseri, Nov., 1895. 

 H. FOLLICULATUM Corda. 



On Zea Mays, Aug. 2, 1895 (Nuttall, 1835). 



H. ATTENUATUM Peck & Cooke. 



On dead log, Short Creek, alt. 1,800 ft., June 10, 1894 

 (Nuttall, 1547)- 



H. SEPTEMSEPTATUM Peck. 



On Magnolia Fraseri, June 20, 1894 (Nuttall, 1574, 534). 

 H. BRACHYPUS E. & E., Field'Mus. Bot., i :92 (1896). 



TYPE HABITAT : On dry wood of old log. Oct. 8, 1895 

 (Nuttall, discov. 1873, 757)- 



Effused in brownish-black patches of several centimeters 

 in extent, velutinous, thin. Prostrate hyphse only sparingly 

 branched, obscurely septate, crooked; fertile hyphse ces- 



