644 



inch or more, brown-black, rugose, larger mixed with smaller ones in 

 the same group. Ostiola indistinct. A vertical section of the tubercles 

 shows one or more rather large, globose perithecia enclosed in the 

 grumose yellow stroma which on the outside is black. Sporidia (sec. 

 Cke. Grev. XI, p. 125) 12x6 it. 



Seriately erumpent in cracks of decorticated oak limbs, Beth- 

 lehem, Pa. (Schw.). 



The spec, in Herb. Schw. is without fruit. The outside appear- 

 ance is like that of H. Sassafras, (Schw.). 



H. Catalpse, (Schw.) 



SphcEria Catalpce, Schw. Syn. N. Am. 1214. 

 Hypoxylon Catalpce, Sacc. Syll. 1509. 



Seriately erumpent through cracks in the bark, of a rusty color at 

 first, then black. Tufts or pulvinuli longitudinally confluent. Surface 

 of the stroma granular from the underlying perithecia, finally black 

 and rugose. Perithecia abundant in the scanty black stroma. Ostiola 

 papilliform, deciduous. Sporidia (Cke. Grev. XI, p. 125) 13x6 /i. 



On bark of Catalpa, Bethlehem, Pa. (Schw.).. 



The sporidia in spec, in Herb. Schw. are 6-7 x 3|-4| //, short- 

 navicular, brown. Perithecia rather less than J mm. diam. 



H. transversum, (Schw.) 



Sphczria transversa, Schw. Syn. N. Am. 11S0. 

 Hypoxylon transversum, Sacc. Syll. 1505. 



Large, subpulvinate, subimmersed in the bark and protruding in 

 a pulvinate manner above, sometimes angular-turbinate. Surface 

 irregularly rugose or even, black. Perithecia peripherical, ovate, 

 shining-black inside. Stroma dark brown, pulverulent, 1 inch long, 

 \ inch thick. Ostiola distinctly prominent, piano-conical. Sporidia 

 (Cke. I.e.), 12x4/^. 



Transversely erumpent through the bark on a trunk of Betula 

 carpinifolia, Mauch Chunk, Pa. (Schw.). 



The spec, in Herb. Schw. has some of the perithecia large and 

 prominent, but mostly only the apex and the papilliform ostiolum pro- 

 jecting. Asci 75-80 fx long (p. sp. 50x7 p). Sporidia navicular, pale 

 brown, 7-8 x 3| ju. 



H. ramosum, (Schw.) in Herb. Berk. Grev. XI, p. 132. 



Convex, erumpent, pulvinate, black, 1 cm. across. Perithecia 

 subglobose, scattered, black, not prominent, pierced above. Asci 



