350 



Perithecia scattered, at first sunk in the scarcely altered substance 

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

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

 black bristles and surrounded at base by brown, creeping hyphse. 

 Asci cylindrical, subclavate, short-stipitate, 8-spored, 100-110x23 //. 

 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 x 10|-11 fi. 



On Draba, Saxifraga, and Pedicularis, in Greenland. 



LEPTOSPHJIRIA, Ces. & De Not. 



Schema, p. 60, Eraend. 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 subi'usoid, two- or more-septate, 

 olivaceous, yellowish, or brown. 



A. On dicotyledonous plants. 



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



L. Jknus, (B. & C.) 



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

 Leptosphceria Janus, Sacc. SyU. 3167. 

 Heptameria Janus, Cke. Syu. 4957. 

 Exsicc. Bll- 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 /i, sessile, paraphysate. Sporidia 8 in an ascus, biseriate, short- 

 fusoid, 4-septate, 20-33 x 4-5 //. 



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



L. TamariciS* (Grev.) 



Sphceria Tamaricis, Grev. Scot. Crypt. Fl. tab. 45, Cnrr. Simple Sphserias, tab. 



58, fig. 81. 

 Leptosph£Eria Tamaricis, Sacc. Syll. 2946, Cke. Syn. 4271. 



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

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

 teriiform manner, but the pei-ithecia themselves are not erumpent, white 

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

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

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



