94 THE WEST VIRGINIA FLORA 



8-spored. Sporidia uniseriate, elliptical, brown, continuous, 

 2-nucleate, 12 to 14 x 6 to 7 /*. 



Distinguished by its very small stroma and perithecia. 

 A. MiCROPLACUM (B. & C.) Sacc. 



On Sassafras Sassafras, alt. 1,800 ft., March 21, 1893 

 (Nuttall, 915). 



XYLARIA Hill. 

 X. POLYMORPHA (Pers.) Grev. 



On dead logs, April 7, 1893 (Nuttall, 890). 



X. CORNIFORMIS Fr. 



On rotten limb, Sept. 9, 1893. On Magnolia Fraseri, 

 Nov., 1895 (Nuttall, 1 194). 

 X. Hypoxylon (Linn.) Grev. 



On dead log, March 10, 1893 (^Nuttall, 807). 



X. FLABELLIFORMIS (Schw.) B. & C. 



On Carpinus Caroliniana, May 13, 1893 (Nuttall, 957). 

 X. Cornu-Damae (Schw.) Berk. 



On wet rotten log, alt. 2,000 ft., Aug. 24, 1893. Spores 

 20 to 21 X 4.5 /i (Nuttall, 1 179). 



USTULINA Tul. 



U. VULGARIS Tul. 



On dead and rotting stumps, March 8, 1893 (Ntittall, 954). 



HYPOXYLON Bull. 

 H. ATROviRiDE E. & E., Proc. Phila. Acad., 346 (1894). 



Type habitat : On bark of dead tree, Betula or Quercus. 

 Dec, 1893 (Nuttall, discov. 1320, 275). 



Stroma pulvinate, i to 1.5 cm. across, and about 4 mm. 

 thick, orbicular, covered above with a thin (.5 mm.) carbon- 

 aceous crust, which is soon covered by a dark green layer 

 of the ejected spores, laterally and internally dirty-umber 

 color. Perithecia (which constitute the entire inner sub- 

 stance of the stroma) ovate compressed, and including the 

 long, stout neck, about 3 mm. long and i mm. broad be- 

 low. Ostiola papilliform, soon covered and obscured by the 

 ejected sporidia. Asci cylindrical 100 x 3.5 to 4 /a (p. sp. 

 40 to 45 long), paraphysate, 8-spored. Sporidia uniseriate, 

 oblong-elliptical, pale brown under the microscope, 2-nuc- 

 leate,_4.S to 5.5 x 2 ^. 



This is a well-marked species. The substance of the 

 stroma, except the superficial carbonaceous layer, is friable, 

 and in this respect as well as the color resembles H. Pelcrsii 

 B. & C from which, however, in other respects it is very 

 distinct. 



