628 



by the conical, prominent ostiola, 2-6 mm. diam., margin surrounded 

 by the undulate-elevated substance of the wood. Asci cylindrical. 

 Sporidia elliptical, attenuated at each end, almond-shaped, continuous, 

 brown, 20 x 8 /i. 



On branches of Catalpa, &c.. North America (Curtis); on oak, 

 South Carolina (Ravenel). 



Schw. in Syn. N. Am. 1219, makes this a synonym of JV. Bull- 

 iardi, which, externally, at least, it must closely resemble. 



N. mdcula, (Schw.) 



Sphceria macula, Schw. Syn. Car. No. 38. 

 Nummulavia macula, Cke. Grev, XU, p. 6, 



Suborbicular, erumpent, flattened-convex, black, marked with the 

 minute, punctiform ostiola. Asci cylindrical. Sporidia broad-oval, 

 dark brown, 12x9 /i. 



On bark of Platanus, Carolina (Schw.), much smaller than N. 

 clypeus. 



HYPOXYLON, Bnlliard. 



Champignons, I, p. i6S, 



Stroma of woody -corky consistence, dark brown or black within 

 and without, free from the first or erumpent-superficial, sometimes 

 more or less sunk in the wood, globose, semiglobose or more or less 

 effused and crustaceous, at first covered by a conidial growth, finally 

 bare. Perithecia peripherical, in a single layer or sometimes in sev- 

 eral layers concentrically arranged, globose, ovate or oblong, cori- 

 aceous or corneo-coriaceous, sunk in the stroma, but generally with 

 the upper part more or less projecting, with a papilliform or umbilicate 

 ostiolum. Asci cylindrical, 8-spored. Sporidia uuiseriate, elliptical 

 or fusoid, inequilateral or curved, continuous, brown. (Winter in Die 

 Pilze). 



A. Large, irregular, fibrous within. {Macroxylon). 



* Perithecia monostichous. 



H. Broomeiannm, B. & C. Grev. IV, p. 94. 



Irregular in shape, suborbicular, 3-4 cm. diam., or oblong, 5-8 x 

 3-4 cm. and J-1 cm. thick, convex, rusty drab color or dirty purplish, 

 surface more or less uneven, margin partially free, in some specimens 

 distinctly so, and then abrupt, black and indistinctly zonate. Peri- 

 thecia in a single superficial layer, elongated, more or less angular 



