615 



varface convex, papillate. Sporidia oblong, brown, uniseptate, 15x5 a," 

 On dead branches of Lindera Benzoin, Xew York and Penn- 

 sylvania. 



The specc. in X. A. F.. like those from Gerard, are sterile. The 

 general aspect is that of D. collecta, which perhaps this is. 



D. smiladeola, Cke. & Ger. Grev. VII, p. 14. 



-Scattered, black, erumpent, convex. Asci cylindrical. Sp-. 

 ridia bifflobose, strono-lv constricted, brown. 18-20 x 10 u. J 



o / i 



On SHI tl fix twigs, Xew York (Gerard). 



D. Epilobii, Fr. S. M. IL p. 559. 



Spots arnplexicaul, smooth, uniformly pitch-black, roughened by 

 the subprominent cells. 



On dead stems of Epilobium angustifolium, Adirondack Mts.. 

 X. Y. (Peck). 



D. abnormis, Howe, Bull. Torr. Bot. Club, V, p. 42, from the de- 

 -rription given, should be Hypoxylon, perhaps a form of H. sWA/c/c- 

 olum, Howe. 



H03IOSTEGIA, Fckl. 



Symb. p. 223. 



Stroma somewhat flattened, or hemispherical, carbonaceous, black, 

 (gray inside). Ascigerous cells immersed, pale. Ostiola minute, 

 papillate. Asci oblong-clavate, 8-spored. Sporidia ovate-elliptical. 

 3-septate, brown. 



H. Piffgotii, (B. & Br.) 



Dothidea Piggotii, B. & Br. Not Brit. Fungi, No. 66e. 

 Sphtzria homostegia, Nyl. in Flora, 1857, p. 638. 

 Homostegia adusta, Fckl. Symb. p. 224. 

 Homostegia Piggotii, Karst. Myc. Fenn. II, p. 221. 

 Exsicc. Fckl. F. Rh. 953. Ell. N. A. F. 485. 



Stroma adnate to the lichen thallus, convex-pulvinate, 1-3 mm, 

 diam., dull black, wrinkled and roughened by the projecting ostiola. 

 Ascigerous cells ovate-globose, white, 120-150 jj. diam. (260 ^, Win- 

 ter), deeply sunk in the stroma. Asci oblong, short-stipitate, par- 

 aphysate, p. sp. 60-70x15 p (60-70x21-24 p Winter). Sporidia 

 imperfectly biseriate, clavate-oblong, subinequilateral, slightly curved, 

 3-septate, brown (almost opake), 18-22 x 7-8 //, slightly constricted at 

 the septa. 



