343 



the perithecia are smaller and the sporidia also smaller and darker 

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

 spots. 



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



PI. lichenalis, (Pk.) 



Sphceria lichenalis, Pk. Bot. Gaz. V, p. 36. 

 Pleospora lichenalis, Sacc. Syll. 3769. 

 Delacourea lichenalis, Cke. Syn. 4529. 



Perithecia scattered, minute, 200-250 p. diam., subhemispherical, 

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

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

 35-40x10-121/^. 



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. ShepherdisB, Pk. 40th Kep. p. 71. 



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

 dermis, erumpent, black. Asci cylindrical, 125-200 x 15 a. Sporidia 

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

 gitudinal septa, constricted in the middle, colored, 20-25 x 7|-10/^. 



On dead branches of Shepherdia Canadensis, New York State. 



PL aretica, Fckl. 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, 132x36 fi. Paraphyses linear, 

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

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

 olive, 28x14/*. 



On dry stems of Epilobium latifolium, Greenland. 



PL Drabse, Schrot. Nord. Pilz. p. 15. 



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

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

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

 13-17 p.. Sporidia biseriate, ellipsoid, 16-20 x 7-9 fi, dark chestnut, 

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



