710 



dermis, about 1 mm. long (exceptionally 1 J-2 mm.), gregarious, black, 

 but not shining; lips nearly closed so as to leave but a narrow cleft 

 between them, marked on each side by two distinct, longitudinal striae. 

 Asci oblong, subsessile, 60x15 //, paraphysate, 8-spored. Sporidia 

 biseriate or inordinate, clavate-oblong or clavate-fusoid, yellowish- 

 hyaline, 3-5-pseudoseptate, one or two of the inner cells divided by a 

 longitudinal septum, 12-20 (mostly 15) x 4-5 //, or, including the 

 gelatinous envelope, 7 p. wide. 



Common, on dead stems of various species of Smilax. 



The perithecia (sec. Schw.), are 2-3 lines (3-6 mm.) long. None 

 of the specc. we have seen, including those in Herb. Schw., are as long 

 as that mostly about 1 mm. long. 



FAMILY. HYPODERMIEJ1. 



Perithecia elongated-linear or elliptical, mostly simple, covered 

 by the epidermis and mostly adnate to it, thin, membranaceous, open- 

 ing by a longitudinal cleft along the summit. 



HYPODERMA, DC. 



Flore de Franc. II. p. 304. 



Perithecia innate, oblong or ellipsoid, at first covered by the epi- 

 dermis, membranaceous, thin, subdimidiate, opening by a longitudinal 

 cleft along the apex. Asci clavate, with filiform paraphyses. Sporidia 

 fusoid or oblong, guttulate, becoming mostly 2-celled, much shorter 

 than the asci. Spermogonia (Leptostroma sp.), orbicular, finally 

 deciduous. Spermatia simple, minute. 



H. commune, (Fries). 



Hysterium commune, Fr. S. M. II, p. 589. 

 Hypoderma commune, Duby, Hyst. p. 41. 



Exsicc. Rab. Herb. Mycol. II, 576. Rav. F. Am. 323. Sydow, M. March. 2151, 3271. Ell. 

 N. A. F. 464. 



Perithecia superficial-innate, ellipsoid, obtuse at each end, black; 

 lips longitudinally rugose or smooth, disk subfuliginous, l-l|x| mm. 

 Asci ovate-clavate, very delicate, slender-stipitate, 8-spored, 60-75 x 

 10-12 fjL, with slender, filiform paraphyses, straight or curved above. 

 Sporidia elongated or narrow-fusoid, straight, subobtuse, 2-celled, 

 hyaline, 18-20x4 ///lying mostly parallel in the upper part of the 

 asci. 



On Sambucus Canadensis, Sedum Telephium, and various dead 



