675 



Perithelia conchiform. - Mytilidion. 



" subcarbonaceous, striate. - - Ostreion. 



*** Sporidia muriform. 

 Peritliecia carbonaceous. .... Hysterographium. 



SCHIZOTHYRIUM, Desm. 



Ann. Sci. Nat. XI, p. 360. 



Perithecia simple, subsuperficial, subcarbonaceous, flattened or 

 somewhat convex, opening with a longitudinal crack or furrow. Asci 

 8-spored. Sporidia ovoid or subfusoid, subhyaline. 



The American representatives of this genus are not well known. 

 We have no authentic specc. of any of the species, and take the diag- 

 noses from Duby's "Memoire sur la Tribu Des Hysterines." 



S. Verbasci, (Schw.) 



Hysterium Verbasci, Schw. in Duby Hyst. p. 33, not Hysterium Verbasci, Schw. 



Syn. N. Am. 2093. 

 Schizothyrium Verbasci, Sacc. Syll. 5558. 



Erumpent, scattered, straight, black, linear, narrow, acute at each 

 end; lips swollen, narrow, obtuse, smooth, only slightly separated, 

 leaving a deep but narrow opening between them. Asci clavate, 

 shorter than the filiform paraphyses. Sporidia biseriate, ellipsoid, 

 hyaline, continuous, with granular contents. 



On stems of Verbascum, Carolina (Schw.). 



This is a very different thing from the Hysterium Verbasci in 

 Herb. Schw., which is a Hysterographium (Gloniopsis). Possibly 

 Duby's specimens were immature, the sporidia not having yet become 

 septate. 



S. cinerascens, (Schw. & Duby). 



Hysterium cinerascens, Schw. in Duby Mem. des Hyst. p. 32, tab. 1, fig. 15. 

 Henriquesia cinerascens, Sacc. Syll. 5565. 



Erumpent, at length innate-superficial, gregarious or crowded. 

 black, elongated-linear, acuminate at the ends; lips swollen, obtuse, 

 not striate, but faintly rugulose, sometimes rimose, leaving a linear, 

 more or less narrow and deep, straight, or subflexuous opening between 

 them. Asci ovate-clavate, with shorter, filiform paraphyses. Sporidia 

 biseriate, ovoid, continuous, hyaline, granular. 



On denuded, decaying wood, Carolina? (Schw.). 



This, too, is very different from the Hysterium cinerascens, in 

 Herb. Schw., which has hyaline, muriform sporidia. 



