1895.] NATUKAL SCIENCES OF PHILADELPHIA. 421 



Accompanied by a Pleospora not distinguishable from P. Herba- 

 rum (Pers. ). 



Sphserella vagans E. & E. 



On dead stems of Valeriana sylvatied Gray and Castilleia 

 miniata Dougl. 



On the slope of Mt. Richtophen, N. W. Colorado, 9,500 ft. alt. 



Perithecia scattered, subcuticular, becoming superficial by the 

 peeling off of the epidermis, depressed-globose, or subelliptical, of 

 tough, coarse cellular structure, perforated above, 250-300// in the 

 longer diameter. Asci cylindrical, subsessile, p. sp. 55-60 x 7-8 //. 

 Sporidia biseriate, ovate, uniseptate, constricted at the septum, 

 hyaline, 12—16 x 5-7 p.. Mixed with the ascigerous perithecia were 

 spermogouial perithecia containing oblong-elliptical hyaline sporules 

 5-6 x 2 //, but whether belonging to the Sphairella or to Leptosphceria 

 concinna E. & E. found on the same stems, is uncertain. 



Physalospora Corni E. & E. 



On dead twigs of Comus. Fort Collins, Colorado, March 1895. 

 C. F. Baker, No. 329^ 



Perithecia thickly scattered, globose about 200// diam. white inside, 

 covered by the blackened-epidermis, which is raised into pustules 

 barely pierced by the papilliform ostiola. Asci clavate- cylindrical, 

 70-90x11-13//, short-stipitate, aparaphysate. Sporidia biseriate, 

 navicular-fusoid, continuous, hyaline, very slightly curved, 

 20-26 x 4-5 //. 



Didymella Ricini E. & E. 



On dead petioles of Ricinus communis, Louisiana. Langlois, 

 No. 2,414. 



Perithecia gregarious, minute, 110-150//, subcuticular, raising 

 the epidermis into black, flattish pustules resembling a young 

 Vermicularia, scattered singly or sometimes 2-3 in the same pustule, 

 Ostiola inconspicuous. Asci oblong- clavate, very short stipitate, 

 45-55 x 8-10 ii. Sporidia biseriate, oblong, obscurely nucleate, 

 becoming uniseptate, not constricted, curved, obtuse, hyaline, 

 13-18x4-4^/7.. 



There is no stroma or any circumscribing line. 



Didymosphaeria Celtidis E. & E. 



On dead limbs of Celtis occidentalis. Rooks Co., Kansas, May, 

 1895. E. Bartholomew. 



