691 

 Tr. fuscnm, E. & E. 



Tryblidium rufulum, Spreng. var. /uscum, H. & E. Journ. Mycol. V, p. 30. 

 Exsicc. Ell. & Evrht. N. A, F. 2d Ser. 2331. 



Perithecia cespitose, erumpent, suborbicular, elliptical, triangular 

 or otherwise irregular from crowding, 2-3xl|-2 mm,, centrally 

 attached, with the margin free and, when dry, with the opposite sides 

 rolled in so as partly to hide the slate-colored disk, and strongly 

 marked with transverse wrinkles or strije. Asci cylindrical, 170 x 

 12-15 ft, with abundant, clavate-tipped pai-aphyses. Sporidia 8 in an 

 ascus, uniseriate, oblong-elliptical, 3-septate and more or less con- 

 stricted, 25-30 X 12-14 /i. 



On dead limbs, near Jacksonville, Fla. (W. W. Calkins). 



We have given this specific rank on account of the clustered 

 perithecia, slate-colored disk and clavate-tipped paraphyses. 



Tr. turgidulum, Phil. & Hark. Bull. Cal. Acad., Feb. 1883, p. 25. 



Scattered, sessile, oblong-elliptical, turgid, nearly smooth, black. 

 Asci clavate. Sporidia oblong-elliptical, uniseptate, strongly con- 

 stricted in the middle, each half 5-6-pseudoseptate, reddish-brown, 

 60-90 X 13-20 fi. 



On dead stems of Pentstemon hremflorus, California (Harkness). 



Specc. in our Herb, from Harkness are entirely sterile. 



Tr. minor, Cke. Grev. IV, p. 182, tab. 67, fig. 9. 



This can not be separated from Opegrapha varia, (Pers.). 



LOPfllUM, Fr. 



Systema Mycol. II, p. 533. 



Perithecia vertical, conchiform, compressed, submembranaceous, 

 fragile; lips acute, closed, at length opening with a very narrow 

 fissure. 



L. mytilinum, (Pers.) 



Hysterium mytilinum, Pers. Syu. p. 97. 

 Lophium mytilinum, Fr. S. M. II, p. 533. 

 Exsicc. Rab. Herb. Mycol. 714.— Fckl. F. Rh. 762. 



Subpedicellate, dilated above, transversely striate, shining-black. 

 Asci cylindrical, 140-160 x 9-10 ji, with a short, thick stipe, 8-spored, 

 with slender, septate, hyaline, branching paraphyses. Sporidia filiform, 

 120-140x1^-2 fi, 18-20-guttulate, hyaline. 



On bark and wood of pine and spruce. Generally arising from a 



