710 



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

 but not shining; lips nearly closed so as to lea\e but a narrow cleft 

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

 Asci oblong, subsessile, 60x15 fi, pai'aphysate, 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 n 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 — mostlj' about 1 mm. long. 



FAMILY. HYPODERMIEJ]. 



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. 



HYPODEIRMA, 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). 



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

 Hypoderma commungyiyuhy, Hyst. p. 41. 

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

 N. A. F. 464. 



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

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

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

 10-12 //, with slender, filiform pai'aphyses, straight or curved above. 

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

 hyaline, 18-20 x 4 /z, lying mostly parallel in the upper part of the 

 asci. 



On Sambucus Canadensis, Sedum Telephium, and various dead 



