22 PLANTS BAKERIAN^E. 



PLEOSPORA HERBARUM (Pers.) Rabh. in Sacc. Syll. ii. 247. 



On dead stems of Lupinus, Hermosa, M*arch 28, and of 

 Erigeron flagellaris, Hermosa, 4 April, n. 51. This seems to 

 be the typical form of a widely dispersed species. 



PLEOSPORA LEPIDIICOLA, n. sp. Perithecia abundant, 

 scattered, buried, the papillate ostioles alone protruding, 

 black, 200-300//. in diameter; asci very numerous, sub- 

 cylindric, short-stipitate, 100-120x20/4; paraphyses numer- 

 ous, filiform ; ascospores subdistichous, ovate, ends broadly 

 rounded, light-brown, 7-septate, much constricted at middle 

 septum, ends somewhat unequal, each section three. or more 

 times vertically divided, the vertical septa sometimes con- 

 tinuous for half the length of the spore, sometimes inter- 

 rupted, about 20-28x10-11/4. 



On dead stems of Lepidium apetalum, Hermosa, 30 March ; 

 n. 52. 



This approaches some of the smaller spored forms that 

 have been referred to P. herbarum. By some it would 

 doubtless be considered as belonging to that composite 

 species to which has been referred material from all the 

 continents and on hosts belonging to most of the larger 

 families of flowering plants. Such mixing of things can 

 serve no good purpose in classification. 



A number of fuscous mycelial threads are usually to be 

 seen adhering to the base of the perithecium, but there are 

 no bristles about the ostiolum as in the closely related 

 genus Pyrenophora. 



PLEOSPORA PERMUNDA (Cke.), Sacc. Syll. ii. 243. On dead 

 stems of some composite, near Pagosa Peak, Aug. 29; n. 53. 

 The spores are rather large for this species, measuring 

 30x12/4. 



PLEOSPORA SENECIONIS, n. sp. Perithecia scattered, buried, 



