703 



Gregarious, lying in various directions on the matrix. Perithecia 

 smooth, black, tubercular at first, becoming oblong-elliptical and about 

 1 mm. long, obtuse above; lips at first closed, then distinctly sepa- 

 rated. Asci oblong-cylindrical, subsessile, paraphysate, 8-spored, p. sp. 

 80-100 X 30-35 [1. Sporidla inordinate, crowded, fusoid-oblong, multi- 

 septate, (7-15-septate,) often with a longitudinal septum running 

 through one or more of the cells, brown, 35-50 x 10-J3 fi. 



Common around Newfield, N. J., on outer bark of living Pinus 

 rigida. 



The obtuse perithecia and submuriform spoi'idia will remove this 

 from Mytilidion. 



H. cinerascens, ScLw. Syn. N. Am. 2076. 



Gregarious, elongated, flexuous, very black, subshining, but punc- 

 tulate on the surface. The surrounding wood is of a cinereous color 

 (hence the specific name). Perithecia densely crowded, elongated ; 

 lips thin, often breaking away in frustules so that the perithecium be- 

 comes widely dehiscent. Asci clavate-oblong, sessile, 75-90 x 15-20 fx, 

 overtopped by abundant paraphyscs, which are blackened and con- 

 glutinated at their tips. Sporidia inordinate, oblong-elliptical, 6-8- 

 septate, with one or more longitudinal s6pta running through the 

 medial cells, brown, about 20 x 8 ;«. 



On rotten wood of Juglans cinerea, Bethlehem, Pa. (Schw.). 



The measurements are from spec, in Herb. Schw., but the spec, 

 not being in good condition, they may not be exact, though they are 

 very nearly so. 



H. Mori, (Schw.) 



Hysterium Mori, Schw. Syn. N. Am. 2087. 

 Hysterographium Mori, Rehm Asc. 363, Sacc. SyU. 5779. 

 Hysterium Rousselii, De N6t. Pir. 1st. p. 19. 

 Hysterographium Rousselii, Sacc. SyU. 5768. 



Hysterium vilicolum, C. & P. Disc. TJ. S. p. 33, Grev. IV, tab. 68, fig. 9. 

 Hysterium Gerardi, C. & P. 1. c. 

 Exsicc. Mil. F. Rt. 751.— Rehm Asc. 316.— Rab. F. E. 2958.— Ell. N. A. F. 75, 77, 78, 

 458, 1286. 



Perithecia erumpent-superficial, elliptical, oblong, linear or cylin- 

 drical, 1-3 mm. long, and J-1 mm. wide, mostly straight and lying 

 parallel, gregarious and often crowded so as to cover the matrix more 

 or less completely for some extent, more or less distinctly longitudin- 

 ally striate; lips mostly closed at first, finally more or less open, 

 exposing a narrow, linear or lanceolate disk. Asci cylindrical, about 

 100 X 12 n (including the short-stipitate base), paraphysate, 8-spored. 

 Sporidia uniseriate or subbiseriate above, ovate, varying to oblong or 



