94 THE WEST VIRGINIA FLORA 



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

 2-nucleate, 12 to 14 x 6 to 7 ju. 



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. POLYMORPH A (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 II (Nuttall, 1179). 



USTULINA Tul. 



U. VULGARIS Tul. 



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



HYPOXYLON Bull. 

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



Type habitat : On bark of dead tree, Betnla or Oiierciis, 

 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 fi (p. sp. 

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

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

 leate, 4.5 to 5.5 X 2 /x. 



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. Pelersii 

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

 distinct. 



