JAN. 1896. FLORA OF W. VIRGINIA MILLSPAUGH & NUTTALL. 97 



acrogenous spores, the sterile longer, septate, colored; spores 

 elliptical, usually with three transverse septae and one or two 

 longitudinal ones, colored, .001 in. long, .005 in. broad. 



SARCINELLA Sacc. 

 S. heterospora Sacc. 



On Cercis Canadensis, Oct. 16, 1894 (Nuttall, 1726, 610). 



STILBACE^:. 



STILBUM Tode. 

 S. magnum Peck. 



In cracks of bark, Nov. 6, 1893. Spores 2.5 x 1.25 // (Nuttall, 

 1278, 225). 



S. flavipes Peck. 



On dead driftwood Platanus occidentalis, Dec. 12, 1894 (Nuttall, 

 1767). 



S. erythrocephalum Ditm. 



On dung of Rabbit, Jan. 18, 1894 (Nuttall, 1345, 304). 



S. vulgar e Tode? 



On fallen dead leaves, Short Creek, July 25, 1893 (Nuttall, 

 1137, 120). 



PILACRE Fries. 



P. gracilipes E. & E., Proc. Phila. Acad. , 1894, 386. 



TYPE HABITAT: On rotten wood, Short Creek, alt. 1,750 ft., 

 Dec. 1 6, 1893 (Nuttall, discov. 1219, 274). 



Scattered, stem slender, white-pruinose, 3 mm. long, .2510.33 

 mm. thick. Head hemispherical, olivaceous, about i mm. diam- 

 eter. Fertile hyphas hyaline, dichotomously branched, 2 to 2.5 /j. 

 thick, bearing the conidia laterally. Conidia globose or subglo- 

 bose, yellow-brown under the microscope, 4 to 5.5 ;t diameter. 



Smaller and of a more slender growth than P. Petersii B. & C. 



P. Petersii B. & C. 



On Acer saccharum and Ilex opaca, Feb. 10, 1894 (Nuttall, 1371). 

 On Magnolia Fraseri, Nov. 1895. 



ISARIA Pers. 



I. Virginiensis E. & E., Proc. Phila. Acad., 1893, 465. 



TYPE HABITAT: On the young stroma of Hypoxylon rubiginosum? 

 June 30, 1893 (Nuttall, discov. 1109, 95, 102). 



Stromata gregarious, simple, slender-clavate, 1.5 to 2 mm. 

 high. Yellowish-white, obtuse and subcapitate at the apex, 

 curved, often decumbent, clothed nearly to the base with spread- 

 ing, hyaline, dendroid, 1.5 to 2 //branching hyphae (sporophores) 

 40 to 45 x 2.5 !JL their tips often toothed and bearing I to 4 ellip- 

 tical or ovate, hyaline 3.5 x 2.5 /z conidia. 



Analogous to /. umbrina Pers (Institale acariforme Fr. ), but 

 differs in several respects. 



