54 THE WEST \'IRGINIA FLORA 



sublenticular, black, raising the epidermis into pustules, 200 

 fj. diameter. Sporules elliptical, hyaline, 3 x 1.5 ;u.. 



Differs from P. Ilicis E. & E. only in its minute sporules. 



PHOMA Fries. 



P. sp. 



On Opulaster opiilifolius, May 7, 1894 (Nuttall, 1510, 

 494). Spores 7 to 10 x 2.5 to 3 /<.. 

 P. NEGUNDiNicoLA RAMicoLA E. & E., Proc. Phila. Acad., 1894, 



357- 



Type habitat: On dead twigs Acer Negundo, April, 

 1894 {Nuttall, discov. 1483, 465, 466?). 



Perithecia evenly but not thickly scattered, globose, small, 

 .2 to .33 pim. diameter, covered by the slightly ruptured 

 epidermis, but distinctly prominent. Sporules oblong, el- 

 liptical, or ovate hyaline, with a single large nucleus, 10 to 



13 X 4 to 5.5 IX. 



Differs from the typical form, on the dead peduncles, in its 

 broader sporules, the former being but 2.5 to 3 fi.. 

 P. Pennsylvanica E. & E., Proc. Phila. Acad., 1894, 357. 



Type habitat: On dead limbs Acer Pcnnsylvanicum, 

 Feb. 2, 1894 {Nuttall, discov. 1361, 318). 



Perithecia numerous, evenly scattered, subepidermal, .33 

 to .5 mm. diameter, whitish inside, raising the epidermis 

 into minute pustules, but scarcely rupturing it. Sporules 

 subglobose, 6 to 7.5 jn diameter, nearly hyaline. 



P. AscLEPiADEA E. & E., Field Mus. Bot., 1:107 (1896). 



Type habitat : On dead stems of Asclepias Syriaca, Oct. 

 10, 1894 {Nuttall, discov. 1717, 604). 



Perithecia thickly, but evenly scattered, subelliptical, 1 10 

 to 120 /x in the longer diameter, subcuticular, covered by 

 the blackened epidermis, which is raised into minute pustules 

 but scarcely ruptured. .Sporules oblong-elliptical, 2-nucleate, 

 hyaline, 5 to 6 x 2 to 2.5 /x. On curved (almost hooked) 

 basidia 12 to 15 /w long. 



Differs from the next form, which occurs with it on the 

 same stems, in its larger perithecia and sporules and its 

 curved basidia. 

 P. sp. 



On dead stems Asclepias Syriaca, Oct. 10, 1894 {Nuttall). 



P. MELALEUCA B. & C. 



On petioles Aralia spinosa, April 25, 1895 {Nuttall, 1810) 



P. LEUCOSTflilA Lev. 



On Opulaster opulifolius. May 13, 1894. Sporules 2.5 to 

 4 X I /i {Nuttall, 1506, 487). 



