90 TIIK Wi:ST VIRGINIA FLORA 



SPHAERIACEAE. 



ANTHOSTOMA Nitschke. 



A. DisciNCOLA (Schw.) Sacc. 



On Crabapple, Monongalia: Morgantown (Sltcldon). 



VALSA Fries. 



V. CERATOPHORA Tul. 



On fire killed Hicoria iiiinima, Oct. 17, 1894. On Acer 

 saccharinum, L. Asci 38 x 5 jx, spores 7.5 to 10 x 1.5 to 

 1.75 fx (Nuttall, 1711). 

 V. DiosPYRi E. & E. Proc. Phil., Acad., 340 (1894). 



Type habitat : On dead limbs Diospyros Virgi>iiaua^ Dec. 

 10, 1893 (Nuttall, discov. 1308, 253). 



Stroma consisting of the slightly blackened substance of 

 the bark, convex, about 2 mm. diameter, not circumscribed. 

 Perithecia 4 to 10 in a stroma, subglobose, .25 to .33 mm. 

 diameter, necks converging and united above in a small, 

 black disk which perforates the pustuli form-elevated epider- 

 mis, but does not rise above it. Ostiola short, conic-cylin- 

 drical, with a smooth, round opening crowded and finally 

 obliterating the disk. Asci clavate-lanceolate, p. sp. 25 x 5 /u,, 

 8-spored. paraphysate. Sporidia allantoid, hyaline, 8 to 10 x 

 1.5 to 2 /x. Spermogonia (Cytispora), stroma multilocular 

 gray inside, opening by a single, central pore. Spermatia 

 allantoid, hyaline, moderately curved, 4 to 5 x 1.25 /x. 

 V. ETHERiALis E. & E. Proc. Phila. Acad., 341 (1894). 



Type habitat : On dead limbs of Acer rnhrum, Feb., 

 1894 {Nuttall, discov. 1304, 373). 



Stromata cortical, thickly scattered, convex i to 1.5 mm. 

 diameter. Perithecia 6 to 12 together, circinate, buried in 

 the unaltered substance of the bark, small, 150 to 250 m 

 diameter their short necks terminating in an erumpent, com- 

 pact fascicle of obtuse, black, slightly umbilicate ostiola 

 closely embraced by the epidermis and scarcely rising above 

 it. Asci (p. sp.) fusoid, 15 to 22 x 4 to 4.5 /x, stipitate, 8- 

 spored. Spordia biseriate, allantoid, hyaline, curved, slender, 

 5 to 6 X about I /x. When well developed, the epidermis is 

 raised into subdiscoid pustules in which the slight protub- 

 erances indicate the position of the subjacent perithecia. 



V. deUcatula C. & E. has fewer, larger perithecia and 

 broader sporidia. V. microshora Cke. & Plowr. has also 

 larger perithecia and yellowish sporidia, and the ostiola are 

 more or less distinctly sulcate, indicating its close relation- 

 ship to Eutypclla. In V. etheriaJis the spordia both in and 

 out of the asci are perfectly hyaline. 



