10 PLANTS BAKERIAN^. 



wide, flat, sessile, long closed but finally exposing the orbi- 

 cular, rugose, dull black disc, margin inconspicuous; asci 

 80-100x20/A, thick walled; paraphyses numerous, thread 

 like, united above in a thick epithecium; ascospores dis- 

 tichous, ovoid, ends obtuse, about 5 septate, somewhat con- 

 stricted, part or all of the cells longitudinally divided, hya- 

 line or probably at length brownish, about 30xlO;u,. 



Common on decorticated twigs of Amelanchier, Cercocarpus, 

 Quercus (n. 14), Rhus, and Salix (n. 15), Hermosa, Colo. 

 March and April, 1899. Often associated with Lophium 

 leptothecum and Melaspilea emergens. Issued as Blitridium 

 rhois n. sp. 



HYSTERIACE.E. 



HYSTEROGRAPHIUM BAKERI, n. sp. Blackening the sub- 

 stratune; ascocarps gregarious, often crowded, dull black, 

 superficial, subcylindric, ends obtuse, lips at first firmly 

 closed forming a slightly elevated ridge, at length some- 

 times slightly parted but not exposing the disc, usually 

 laterally longitudinally striate, J-lmm. x about |mm.; 

 asci subcylindric, exceeded by the thread like paraphyses, 

 about 80xl2ft; ascospores distichous, variously elliptic or 

 subcylindric, usually 5-7 septate, slightly constricted, one 

 or more of the medial cells once vertically or obliquely 

 divided, ends narrowed but obtuse, light brown, 20-22x6/n. 



On decorticated wood of Cercocarpus, Hermosa, Colo., 

 March 28. 



HYSTEROGRAPHIUM INCISUM, E. & E. Bull. Torr. Club, 

 xxiv. 462. On dead twigs of Peraphyllum, Durango, March 

 19. On Amelanchier, Hermosa, March; n. 30. 



HYSTEROGRAPHIUM, sp. On Quercus, Durango, March 27. 

 A small specimen insufficient for full determination; prob- 

 ably new. 



