647 



H. atroptirpiireum, Fr. Summa Yeg. Scand. p. 384. Xitsch. Pyr. 

 Germ. p. 48. Sacc. F. Ital. tab. 577. 



Sphcsria atropurpurea, Fr. S. M. II, p. 340, Fr. Obs. I, p. 174. 

 Exsicc. EH. N. A. F. 1180. 



Stroma broadly effused, continuous or interrupted, thin, purplish- 

 black, becoming nearly black, surface minutely papillate from the 

 slightly prominent perithecia, which are of medium size and are 

 closely packed in a single layer. Asci (p. sp.) cylindrical, 50-60 x 

 7-8 [i. Sporidia obliquely monostichous, ovate, subacute at each end 

 and slightly inequilateral, opake. 10-14x5-6 //. 



On bark of Tilia, Iowa (Hoi way), on bark, British Columbia 

 (Macoun), Now York (Peck). 



H. albociiictuni, E. & E. Proc. Phil. Acad. July, 1890, p. 229. 



Stroma thin (1 mm.), flat, carbonaceous, mostly orbicular, \-\ cm. 

 diam., light cinereous at first, soon purplish-black except the margin, 

 which remains light-colored for some time, surface uneven from the 

 projecting vertices of the perithecia wlm-h are ovate-globose, small 

 (J-J mm.), monostichous, moderately crowded, sunk nearly to the base 

 of the stroma, contracted above into short necks terminating in the 

 minute, papilliform ostiola. Asci cylindrical, 80-100 x 5-6 n (p. sp. 

 about 60 fj. long), with abundant paraphyses. Sporidia uniseriate, 

 narrowly elliptical, brown, 1-2-nucleate, subacute, 7-8 x 3 J-4 p.. 



On bark of dead Cratcegus, Hamilton Co., Ohio (Morgan). 



The bark beneath the stroma is whitened and surrounded by a 

 black, circumscribing line. The general appearance is like that of 

 orbicular forms of If. serpens, from which it differs in its purplish 

 stroma and smaller perithecia and sporidia. 



H. cinereum, E. & E. (in Herb.) 



Stroma oblong, 3-4x1 cm., thin, cinereous, surface even and 

 smooth as if polished. Perithecia depressed-globose, minute (200 p. 

 or less). Ostiola punctiform, slightly depressed, orbicular, white. 

 Asci not seen. Sporidia oblong-elliptical, 2-nucleate, nearly opake, 

 8-10x3J-4^. The wood beneath the stroma is bleached and sur- 

 rounded by a black line which penetrates deeply. 



On rotten wood, near St. Martins ville, La. (Langlois, 2278). 



Has the general appearance of Diatrype stigma. The color of 

 the stroma on the surface is about that of marbleized iron ware, but 

 nearly black within. 



