343 



the perithecia are smaller and the sporidia also smaller and darker 

 colored. Sphceria Lactucarum, Schw., is said to grow on cinereous 

 spots. 



On decaying stems of Lactuca Canadensis, Newfield, N. J. 



PI. lichenklis, (Pk.) 



SphcEria lichenalis, Pk. Bot. Gaz. V, p. ^6. 

 Pleospora lichenalis, Sacc. Syll. 3769. 

 Delacourea lichenalis, Cke. Syu. 4529. 



Perithecia scattered, minute, 200-250 [i diam., subhemispherical, 

 erumpent, black, with a papilliform ostiolum. Asci oblong-elliptical. 

 Sporidia crowded, oblong, multiseptate, fenestrate, greenish-yellow, 

 35-40 xlO-12i/i. 



On bark of birch trees, Vermont. 



The perithecia occupy a discolored spot, which gives a lichenose 

 aspect to the fungus. Sometimes 2-3 perithecia are seriately crowded 

 or subconfluent, so as to present a hysteriiform appearance. 



PI. Sheph^rdise, Pk. 40th Rep. p. 71. 



Perithecia scattered, small, 350-450 // diam., covered by the epi- 

 dermis, erumpent, black. Asci cylindrical, 125-200x15 //. Sporidia 

 uniseriate, oblong, generally 3-septate, rarely 5-septate, with 1-2 lon- 

 gitudinal septa, constricted in the middle, colored, 20-25 x 7J-10 fi. 



On dead branches of Shepherdia Canadensis, New York State. 



PI. arctica, Pckl. in Die Zweite Deutsch. Nordpolarf. II, p. 52, 

 tab. I, fig. 2. 



Perithecia scattered under the cinereous, pustulate-inflated epider- 

 mis, of medium size, globose, black, with papilliform, perforated, slight- 

 ly prominent ostiola. Asci oblong, mostly curved, with a short, thick 

 stipe, and thick membrane, 8-spored, 132 x 36 //. Paraphyses linear, 

 septate or multinucleate, hyaline. Sporidia imbricated-biseriate, ob- 

 long-ovate, constricted in the middle, 6-7 -septate and muriform, dark 

 olive, 28 X 14 ji. 



On dry stems of EpHoUum latifolium, Greenland. 



PI. Drahse, Schrot. Nord. Pilz. p. 15. 



Perithecia globose-depressed, 300 ^ diam., surrounded at base by 

 creeping, brown hyphse, otherwise glabrous, collapsing, papillate. 

 Asci cylindric-clavate, subattenuated below, short-stipitate, 60-70 x 

 13-17 pi. Sporidia biseriate, ellipsoid, 16-20 x 7-9 [i, dark chestnut, 

 5-7-septate, with 2-3 longitudinal septa. 



