340 



rather abruptly contracted at the base, 75-80x10-12//, pai-aphysate. 

 Sporidia bisei-iate, oblon^-elb'ptical, 3-septate, yellow-brown, con- 

 stricted at the middle septum, slightly curved, one or both the inner 

 cells divided by a longitudinal septum. The perithecia become finally 

 slightly collapsed above. 



On dead stems of Cassia, with Leptosphceria cassicecola, Hous- 

 ton, Texas (Ravenel). 



PI. baccata, Ell. Bull. Torr. Bot. Club, X, p. 53. 



Perithecia scattered, subcuticular, becoming bare and superficial 

 by the falling away of the cuticle, depressed-globose, strongly papilli- 

 form, thick-membranaceous, black, 300-500 /i diam., fringed around 

 the base with spreading mycelium. Asci 75-85 (exceptionally 114)x 

 20-24 /i; paraphyses abundant, conglutinate. Sporidia inordinately 

 biseriate, oblong or ovate-oblong, at first 3-septate with a longitudinal 

 septum across one or two cells, and constricted at the septa, when 

 mature 5-septate, 20-30 (mostly 20-25) x 10-14 /i, with 1-3 imperfect, 

 longitudinal septa. 



On dead stems of Cirslum, sp., Utah. 



Berlese (monograph, p. 195) makes this a synonym of PI. per- 

 munda, Cke., but it is a much coarser species ■ besides the fact (not at 

 first noticed) that the mature sporidia become 5-septate. 



PI. avirea, Ell. Bull. Torr. Bot. Club, X, p. 53. (Plate 28) 



Perithecia gregarious, subcuticular, 150-250 /i diam., membra- 

 naceous and collapsing when dry, of coarse, cellular structure, sur- 

 rounded at base with a fringe of brown, septate, branching, mycelial 

 hyphffi (as in PI. permunda) plainly visible through the transparent 

 cuticle. Asci broad, obtuse, mostly inequilateral or curved, ovate- 

 oblong, 75-114x25 [1, with a very short stipe. Paraphyses stout, 

 rather longer than the asci, guttulate, about 2 fi thick. Sporidia 

 inordinate or subbiscriate, ovate-elliptical, 22-25 x 12-14 //, and about 

 10 or 11 // thick, golden yellow, becoming dark brown. 



On dead herljaceons stems, Pleasant Valley, Utah (S. J. Hark- 

 ness). 



Berlese (monograph, p. 195) puts this, too, as a synonym of PI. 

 permunda, Cke., the specc. sent him being that species instead of 

 PI. aurea, the two being hardly distinguishable outwardly except that 

 PI. permunda has rather larger perithecia. Under the microscope the 

 two are readily distinguished, PI. aurea having 4-septate sporidia. 



The measurements of these two species in the Torr. Bull, appear 



