524 



M. Altii, Tul. differs in its stroma liirl it-colored or yellowish 



/ 



within, and its smaller sporidia. Tulasne describes spermogonia and 

 pvenidia associated with J/. Alni,\)ut in the specc. we have examined, 

 we 1m ve not yet seen them. 



M. Everlmrtii, Ell. Bull. Torr. Bot. Club X, p. 117. (Plate 35) 



Mi'lanconis dasycarpa, E. & K. Journ. Mycol. II, p. 3. 

 Exsicc. Ell. & Evrht. N. A. F. 2d Ser. 1561, 1565. 



Stroma slightly sunk in the surface of the inner bark, scarcely 

 exceeding 1 mm. iliam., without any black circumscribing line, hemi- 

 spherical or convex. Perithecia 3-18 in a stroma, small, mostly 

 about J mm. diam., their necks rising together and piercing the mostly 

 stellate-cleft epidermis in a rather loose fascicle, without any distinct 

 disk- Ostiola cylindrical, more or less exserted, their tips pierced with 

 a rather large, round opening. Asci oblong- or clavate-cylindrical. 

 1 00-1 20 x 18-20 , with paraphyses more or less distinct. Sporidia 

 biseriate, oblong-elliptical, slightly curved, uniseptate, nearly hyaline, 

 slightly or not at all constricted at the septum, 25-38 x 8-11 ,, with a 

 slightly oblique, stout, hyaline, horn-shaped appendage, 16-20 x 3 IJL at 

 each end. 



On dead maple limbs, West Chester, Pa., on dead limbs of Acer 

 dasycarpum, Kansas, (Kellerman). 



The ostiola soon throw off the epidermis, and the perithecia them- 

 selves soon fall out, leaving light-colored, circular spots marking the 

 place of their attachment. Distinguished from M. Meschuttii, and 

 M. Aim, by its elongated ostiola and larger sporidia. 



M. tiliacea, (Ell.) 



Diatrype tiliacea, Ell. in Am. Nat. Feb., 1883, p. 195. 

 Exsicc. EH. & Evrht. N. A. F. ad Ser. 2521. 



Perithecia subcircinate, 4-12 together in the substance of the 

 inner bark, which is a little paler, and circumscribed by a more or less 

 distinct black line, globose J mm., or ovate J x J mm. diam., necks 

 rather thick, cemented together above into a slate-colored, firm, waxy 

 mass, through which protrude the conic-cylindrical ostiola, sometimes 

 |-1 mm. long, at length irregularly dehiscent. Asci oblong or clavate- 

 oblong, p. sp. mostly 75-80x13 //, but sometimes 80-90x15-22 //, 

 with obscure, evanescent paraphyses. Sporidia biseriate or sometimes 

 3-seriate, oblong-cylindrical, straight or slightly curved, uniseptate and 

 slightly constricted at the septum, hyaline, 22-30 x 7-8 //. 



On dead Tilia Americana Ames, Iowa (Arthur), Bellville, Can- 

 ada (Macoun), and London, Canada (Dearness). 



