590 



D. Vitis, E. & E. Proe. Acad. Nat. Sci. Phil. July, 1890, p. 225. 



Stroma tuberculiform-hemispherical, about 1 mm. diam., erumpent- 

 superficial, black inside. Perithecia 1-4 in a stroma, globose, J mm. 

 diam., black and shining within, contracted above into a short neck. 

 Ostiola scarcely prominent, quadrisulcate. Asci polysporous, 75-80 x 

 10-12 fi, clavate-cylindrical, rather abruptly contracted below into a 

 stipitate base, and surrounded by obscure paraphyses. Sporidia allan- 

 toid, yellowish-hyaline, 6-7 x 1 \ ju, not strongly curved. The surface 

 of the wood beneath the stroma, as well as the inner surface of the 

 bark, is marked with a black circumscribing line. 



On dead vines of Vitis bipinnata, Bayou Chene, La. (Langlois). 



D. Demetrionis, E. & E. 1. c. 



Stroma pulvinate, depressed-hemispherical, orbicular, slate-black, 

 1J-2 mm. diam., penetrating to the wood, which is marked with a 

 black circumscribing line, closely embraced by the superficial layer of 

 the bark, which forms a narrow, adnate margin; inner substance whit- 

 ish. Ostiola only slightly prominent, distinctly but not deeply radiate- 

 clelt. Perithecia of medium size, globose or angular from mutual 

 pressure. Asci slender-clavate, 75-80 /i long (p. sp. 35 x 6 ja). Spo- 

 ridia crowded, pale yellowish in the mass, nearly hyaline when separ- 

 ated, minute, allantoid, slightly curved, about 4-5 x 1-1 | [ This 

 comes near I). exigua, Winter, which is also on willow limbs, but that 

 species is said to have the stroma very small (" minutissimis") and the 

 sporidia 8xlJ //. In the Colorado specimens we found no sporidia 

 over 5 fi long, and mostly only about 4 /i. The general appearance 

 is almost exactly that of Diatrype discifbrmis. 



On dead limbs of Salix chlorophylla, Wet Mountain Valley, Col- 

 orado (Deiuetrio). 



D. aspera, (Fr.) 



Sphceria aspera, Fr. S. M. II, p. 354. 

 Diatrype aspera, Fr. Summa, p. 385. 

 Diairypella aspera, Nits. Pyr. Germ. p. 74. 



Stroma ta scattered or subconfluent, rising from a suborbicular 

 base, cylindrical or prisma tical, strongly erumpent, sides abrupt and 

 closely surrounded by the adherent lobes of the ruptured epidermis, 

 whitish inside, apex bare, black, plane or convex, and roughened by 

 the thick, rough, conical or cylindrical ostiola. Perithecia 4-12 in a 

 stroma, monostichous, often circinating around a central one, rather 

 large, subglobose, or subcompressed r suddenly attenuated into a very 



