702 



On bark of Syringa vulgaris, Pennsylvania (Scliw.), New York 

 (Gerard), New Jersey (Ellis). 



The perithecia are small, only a little larger than those of Hys- 

 terium Prostii, Duby, which they much resemble. The specc. in 

 Herb. Schw. are without fruit. The above diagnosis is from specc. 

 sent by Gerard. Cooke's figure in Grevillea represents the asci and 

 sporidia very accurately. 



H. formosum, (Cke.) 



Hysterium formosum, Cke. Grev. VII, p. 3. 

 Hysterographium formosum, Sacc. Syll. 5780. 

 Exsicc. EU. & Evrht. N. A. F. 2d Ser. 2092. 



Perithecia scattered, prominent, 1-1 mm. long and proportional- 

 ly rather broad, not depressed above, black and shining, striate, lips 

 closed. Asci cylindrical, 80-90x10 fi with abundant paraphyses, 8- 

 spored. Sporidia uniseriate, oblong-elliptical, 3-septate and faintly 

 inuriform, brown, slightly constricted at the middle septum, 18-22 x 

 7-8 fju 



On dead limbs of Pinus contorta and Juniperus occidentalism 

 Sierra Nevada Mts., California (Harkness). 



H. subrugosum, (C. & E.) 



Hysterium subrugosum, C. & E. Grev. V, p. 54, PI. 81, fig. 1. 

 Hysterium acuminatum, Fr. in Herb. Schw. 

 Hysterographium subrugosum, Sacc. Syll. 5770. 

 Exsicc. EU. N. A. F. 459. 



Perithecia scattered, oblong-elliptical, faintly transversely sub- 

 rugose, black, not striate, about 1 mm. long, often slightly curved; lips 

 incurved, open so as to expose a narrow strip of the black disk. Asci 

 oblong-cylindrical, sessile, paraphysate, rounded at the apex, 75-80 x 

 20 ju. Sporidia inordinate, ovate-oblong, obtuse, slightly curved, 5-7- 

 septate, with one or two partial longitudinal septa, 20-25 x 10 jut (40- 

 45 p. long, sec. Cooke). 



On dry hard wood of decaying oak stumps, Newfield, N. J. 



The substance of the perithecia, when crushed under the micro- 

 scope, has a reddish tinge. The spec, in Herb. Schw. labeled Hyste- 

 rium acuminatum, Fr., is certainly the same as H. subrugosum, C. & 

 E. and very different from H. acuminatum, Fr. The sporidia in all 

 the specc. examined are much smaller than stated in Grevillea. 



H. Nova-Csesariense, (Ell.) 



Hysterium Nova-Ccesariense, Ell. Bull. Torr. Bot. Club, VI, p. 133. 

 Mytilidion Nova-Ccesariense, Sacc. Syll. II, p. 764. 

 Exsicc. Rehm Asc. 313. Roum. F. Gall. 4854. EU. N. A. F. 152. 



