334 



short, conical, black ostiola rnmipcnt. Asci oblong-clavate, attenuated 



below, 4-8-sporod. Sporidia obliquely uniseriate, elliptie-navicular, 

 uniseptatc, not constricted, bro\vn. Stylospores in larger perithecia. 

 On dead branches of grape vines. Saii.uvrl.ics. N. Y. (Peck). 



D. polysticta, (B. & C.) 



Sphceria polysticta, B. & C. Grev. IV, p. 149, 

 Didymosphceria polysticta. Sacc. Syll. 2670. 

 Didymosphczrella polysticta, Cke. Syn. 4668. 



Perithecia scarcely raising the cuticle, visible chiefly from the 



black, dot-like ostiola. Asci linear, Sporidia oblong, uniseptate, 

 71 x 3.31 /2 . 



On stems of Smilax, Alabama (Beaumont). 

 D. Yizeana, (Cke.) 



Sphceria Vizeana, Cke. Grev. VII, p. 12. 

 Didymosphceria Vizeana, Sacc. Sj T ll. 2651. 

 Didymosphcsrella Vizeana, Cke. Sj'n. 4662. 



Perithecia gregarious or scattered, about 200 // diam., covered by 

 the blackened epidermis, finally collapsing. Asci oblong, sessile, 

 GO-75 x 18-20 //, (paraphysate) ? Sporidia biseriate, oblong-elliptical, 

 sul (inequilateral, yellowish, uniseptate, 18-22 x 7-10 p.. 



On dead stems of Lathyrus venosus, Sacramento, Cal. (Harkness). 



D. adelphica, (Cke.) 



Sphczria adelphica, Cke. Grev. VII, p. 42. 

 Didymosphcsria adelphica, Sacc. Syll. 2652. 

 Didymosphczrella adelphica, Cke. Syn. 4663. 



This is an unsatisfactory and doubtful thing. The brief descrip- 

 tion in Grevillea does not enable one to recognize it. The spec, in our 

 herb, is only a stylosporous fungus (Diplodia), poorly developed. 



PLEOSPORA, Rabh. 



in Herb. Mycol. Ed. II, No. 547. 



Stroina none. Perithecia at first covered, finally more or less 

 perfectly erumpent, mostly membranaceous. seldom of firmer texture, 

 black. Asci j mostly oblong or clavate-cylindrical, 8-spored, paraphy- 

 <ate. Sporidia oblong, ovate or clavate-fusoid, with both transverse 

 and longitudinal septa (muriform), generally colored (yellow or yellow- 

 brown). 



This interesting but difficult genus has been elaborately described 

 and beautifully illustrated by Dr. A. N. Berlese, in his valuable mono- 

 graph of Pleosporn Arc. in Nuovo Giorn. Bot. ItaL Vol. XX, Nos. 1 

 and 2. 



