350 



Perithecia scattered, at first sunk in the scarcely altered substance 

 of the host, afterwards more or less erumpent, 260-320 fi diam., 

 spherical or slightly depressed, tipped with a tuft of straight, rigid, 

 Mack bristles and surrounded at base by brown, creeping hyphae. 

 Asci cylindrical, subclavate, short-stipitate, 8-spored, 100-110 x 23 p.. 

 Sporidia biseriate, becoming uniseriate by the lengthening out of the 

 asci, oblong, obtuse, constricted in the middle, 7-septate, with one or 

 two longitudinal septa, 24-30 xl0|-ll /i. 



On Ztraba, Saxifraga, and Pedicularis, in Greenland. 



LEPTOSPHiERIA, Ces. & De Not. 



Schema, p. 60, Fmend. Sacc. Syll. II, p. 13. 



Perithecia at first covered by the epidermis, finally more or less 

 erumpent, subglobose, coriaceo-membranaceous, glabrous, mostly with 

 a papilliform ostiolum. Asci subcylindrical, mostly 8-spored, par- 

 aphysate. Sporidia ovoid, oblong or subfusoid, two- or more-septate, 

 olivaceous, yellowish, or brown. 



A. On dicotyledonous plants. 



* On trees and shrubs; sporidia 2-3- (rarely 4-) septate. 



L. Janus, (B. & C.) ^ 



Sphceria Janus, B. & C. Grev. IV, p. 154. 

 Leptosphceria Janus, Sacc. Syll. 3167. 

 Heptameria Janus, Cke. Syn. 4957. 

 Fxsicc. EH. N. A. F. 1299. 



Perithecia collected on yellowish-brown spots on the under side 

 of the leaf, and penetrating to the upper surface. Asci oblong, 60-75 x 

 9-10 fi. sessile, paraphysate. Sporidia 8 in an ascus, biseriate, short- 

 fusoid, 4-septate, 20-33x4-5 fi. 



On leaves of Quercus virens, Texas (Wright), Florida (Martin). 



L. Tamaricis, (Grev.) 



Sphczria Tamaricis, Grev. Scot. Crypt. FI. tab. 45, Curr. Simple Sphserias, tab. 



58, fig. 81. 

 Leptosphcsria Tamaricis, Sacc. Syll. 2946, Cke. Syn. 4271. 



Perithecia gregarious, scattered, subcutaneous, 150-200 // diam., 

 raising the epidermis into pustules which are soon ruptured in a hys- 

 teriiform manner, but the perithecia themselves are not erumpent, white 

 inside, with an obtuse, papilliform ostiolum. Asci clavate-cylindrical, 

 subsessile, rounded above, paraphysate, 65-70x15-20 //. Sporidia 

 crowded-biseriate, ovate-oblong, 3-septate and strongly constricted. 



