FUNGI. 21 



large, loose-celled parenchyma, the cells 8-1 0/<t in diameter 

 and arranged somewhat radially; asci clavate, substipitate, 

 about 100xlO/-t ; paraphyses abundant, filiform; ascospores 

 subdistichous, light-yellowish, 3-septate, much constricted, 

 ends rounded, one of the medial cells usually slightly en- 

 larged, 20-25x5/*. 



On dead, weathered stems of Veratrum, near Pagosa Peak, 

 10,000 feet, Aug. 29. The perithecia are finally exposed 

 by the falling away of the weathered epidermis giving some 

 of the older specimens the aspect of a Trematosphaeria. 



PLEOSPORA AUREA, Ell. Bull. Torr. Club, x. 53, and N. A. 

 Pyrenomycetes 340, not of Tassi. Atti. R. Ace. Siena, 1896. 

 On dead stems of Ligusticum, near Pagosa Peak, 10,000 feet, 

 23 Aug. ; n. 50. 



PLEOSPORA COMPOSITARUM, n. sp. Perithecia scattered, 

 buried, flattened, black, about 200/A, membranous, of firm 

 cellular parenchyma, cells small, 4-8/4, fringed at base with 

 short mycelium strands; asci oval to ovate, short-stipitate 

 80-90x20/4 ; paraphyses abundant, exceeding the asci ; con- 

 tinuous but conspicuously guttulate, tips slightly swollen 

 and sometimes vaguely branched ; ascospores distichous, 

 brown, irregularly oval to ovate, ends obtuse, 5- (occasion- 

 ally 6-7-) septate, conspicuously constricted at the middle 

 septum and often somewhat curved, medial cells usually 

 once vertically divided, end cells entire, 20-25x8-1 0/*. 



On dead stems of Eucephalus, at Hermosa, 30 March; 

 n. 76. This is smaller throughout than P. herbarum and 

 the spores are usually only 5-septate. It agrees quite closely 

 with the description of P. vulgaris Niesse., as given by Ellis, 

 N. A. Pyr. 339, but the spores are quite different from those 

 figured by Berlese in his Monograph PI. 2 fig. 6 for P. in- 

 fectoria Fckl. to which species he reduces P. vvlgaris. 



