539 



without any distinct stroma. with converging, short-cylindrical necks 

 lent upwards at their extremities and just visible through short, 

 narrow cracks in the epidermis, but not exserted. Asci elliptical or 

 oblong-elliptical, with a short stipe, 8-spored, 90-105 x 35-40 //. Spo- 

 ridia conglomerate, oblong or oblong-cylindrical, ends broadly rounded. 



c i / i, 



subinequilateral, often a little curved, 2- (sometimes 3-) septate, not 

 constricted, brown, 25-35x12-14 //, with a short, thick, hyaline 



/ 



appendage at each end. 



On dead limbs of Platanus occidentalis, New York (Peck). 



Ps. bicornis, (Cke.) 



Melanconis bicornis, Cke. iu 28th Rep. N. Y. State Mus. p. 72, 

 Pseudovalsa bicornis, Sacc. Syl. 3364, Cke. Syn. 2110. 



Perithecia circinating, 5-7, seated beneath the epidermis which 

 Is but slightly raised. Ostiola short, convergent, just piercing the epi- 

 dermis, with a regular orifice. Sporidia expelled when mature, black- 

 ening the matrix around the ostiola, fasciculate, obtusely fusiform, 

 triseptate, straight or curved, In-own, 63-78 ft long, scarcely con- 

 stricted, end cells smallest, each extremity tapering into a hyaline, at 

 first straight, then curved or flexuous. horn-shaped appendage one-half 







to one-third the length of the sporidium. 



On bark of Pl<it<nni* occidentalis, New York State (Peck). 



Allied to Ps. haplocystis, (B. & Br.), but distinct. When the epi- 

 dermis is torn away, tin: peritliecia come off with it They are slightly 

 Avhitish-floccose or tomentose above. 



Ps. sambiicina, (Pk.) 



Valsa sambucina, Pk. 2Sth Rep. p. 75. 



Pseudovalsa sambucina, Sacc. Syll. 3356, Cke. Syn. 2103, 



Pustules erumpent, sometimes seriately placed. Ostiola slighth 

 prominent, even or radiately sulcate, scattered or crowded, Asci lin- 

 ear. Sporidia 8, uniseriate, oblong, colored, triseptate, 12-15 p. long. 



On dead stems or branches of Sambucus, Catskill Mts., N. Y. 

 (Peck). 



When young, the Sporidia are paler. The pustules vary much in 

 size: those on the branches being larger and more scattered than 



/ * ' t * 



those on the main stems and trunks, 



Ps. stylospora, E. & E. Proc. Acad. Nat. Sci. Phil. Pa., July, 1890, 

 p. 223. (Plate 35) 



Stroma cortical, convex, 2-3 mm. cliam., covered by the epidermis. 

 Perithecia circinate, 4-8 in a stroma, globose, f mm. diam., collapsing 



