FUNGI. 13 



been referred here; but the asci are only 60-80x6/*, and the 

 ascospores 8-10x4-5//, which is smaller than the measure- 

 ments usually given. In Durango specimens on oak, and 

 others from Hermosa, the perithecia are superficial, or 

 nearly so, but seem partially buried by the fine fibrous 

 shreds of the weather-worn wood. 



ROSELLINIA SUBCOMPRESSA, Ell. & Ev.? Bull. Torr. Club, 

 xxiv. 177. On barkless wood of poplar, at Hermosa, 1 

 April; n. 65. In the absence of authentic specimens for 

 comparison these are so named with some doubt, though 

 they agree with the short description given. 



CUCURBITARIACE.E. 



CUCURBITARIA BERBERiDis, S. F. Gray, Nat. Arr. i. 519. 

 Durango, 19 March, on dead twigs of Berberis Fendleri. 



OTTHIA CLEMATITIS, n. sp. Perithecia crowded or occa- 

 sionally scattered, dull-black, carbonaceous, rugulose, about 

 J mm. in diameter, ostiole perforate, slightly sunken, seated 

 on a thin crust-like black stroma that remains after the 

 breaking down of the perithecia, developing under the cuti- 

 cle but exposed by its rupturing and breaking away, by con- 

 fluence sometimes forming linear masses several cm. in 

 length; asci paraphysate, subcylindric, 90-1 20x1 6-20/x; 

 ascospores inordinate, oval, ends subacute, slightly con- 

 stricted, often somewhat curved, about equally uniseptate, 

 light brown, about 40x8/*. 



On dead and decaying bark of Clematis ligusticifolia, Du- 

 rango, 19 March; n. 41. Most of this material is too old 

 The species should be collected in autumn. On some stems 

 the perithecia are mostly scattered so that it might be taken 

 for a Didymosphseria. In other cases they are densely cespi- 

 tose and seated on an evident stroma. 



