575 



hemispherical, deeply 4^5-sulcate-cleft. Asci (p. sp.) 40-45 x 7-8 //, 

 with stout paraphyses and allantoid, yellowish, moderately curved, 8- 

 12 X 2J [1 sporidia. Specific name from Hochelaga, an Indian name 

 for the St. Lawrence River. 



On decorticated elm wood, London, Canada (Dearness). 



D. tremelliiphora, Ell. in Am. Nat. March, 1882, p. 239. 



Diaiyype disci/ormis, B. & C. 



Diatrype disci/ormis^ var. Magnolics, Thum, in Bull. Torr. Bot. Club, VI, p. 95. 

 Sxsicc. Rav. F. Am. seo.-'Thum. M. U. 359.— Ell. N. A. F. 775. 



Stroma as in D. disciformis, only mostly smaller and closely 

 embraced by the lacinise of the ruptured epidermis, at first concave 

 and covered by a thin, circular, tremelloid, reddish orange-colored 

 membrane which soon turns black ^d falls oif, revealing the disk of 

 the stroma beneath it minutely white-punctate from the incipient 

 ostiola. The stroma finally becomes more erumpent, flattish-convex, 

 brown, and subrimose, and the punctiform ostiola darker but not 

 prominent. Asci and sporidia as in D. disciformis. 



On dead trunks of Magnolia glauca, New Jersey and Carolina. 



D. minima, E. & E. Journ. Mycol. I, p. 91. 



Stroma cortical, formed of the scarcely altered substance of the 

 bark, elliptical, 1-2 mm. diam., limited by a black, circumscribing line 

 which penetrates the wood beneath. Perithecia 8-12 in a stroma, 

 lying in a single layer, globose, 150-200 fx diam., membranaceous, 

 with black, rather thick walls and short, obtuse ostiola, their apices 

 papilliform, black and shining at first, then distinctly perforated witli 

 a rather broad opening. Asci cylindrical, 70-80 x 2i-3 fi. Par- 

 aphyses obscure (or none?). Sporidia uniseriate, lying end to end, 

 oblong-elliptical, 2-nucleate, yellowish, nearly hyaline, 5-7 x 2 fx. The 

 black, scarcely projecting ostiola which dot the small, tuberculiform 

 stroma, are visible through short, longitudinal cracks or chinks in the 

 slightly elevated epidermis. 



On dead shoots and limbs of Magnolia glauca, Newfield, N. J. 

 Probably not uncommon, but easily overlooked. 



D. sphser^spora, E. & E. Journ. Mycol. Ill, p. 42. 



Stroma formed of the scarcely altered substance of the bark, 

 erumpent, but not very prominent, surrounded by the ruptured epi- 

 dermis, small (i-1 mm.). Perithecia in a single layer, 3-12, black, 

 membranaceous, minute (166-200 ji), their smooth, black, obtusely 



