260 



" S})ots arid, suborbicular, some times with a brownish border, 

 i -| an inch diam. Peritheeia black, those well developed are con- 

 cave above with a slight elevation in the center. Asci subfusifonn, 

 4-8-spored, spores densely packed in the asci, oblong, or narrow-ellip- 

 tical, having a little nucleus near each end, 12-15x4 6 /i, about 

 \ as long as wide." 



On leaves of Fraxinus Americana, Albany, N. Y. (Peck). 



Apparently different from Sphcerella fraxinicola, (Schw.) 



L. spinicola, (E. & E.) 



Sphcerella spinicola, E. & E. Proc. Acad. Nat. Sci. Phil. July, 1890, p. 231. 



Peritheeia scattered or 3-4 together, minute 110-120 /i, collaps- 

 ing, visible through the translucent epidermis as minute black specks. 

 fringed around the base with scanty mycelium. Ostiolum papilliform. 

 Asci oblong, sessile, 45x12 /i (p. sp.) Sporidia biseriate, oblong-ellip- 

 tical, continuous, granular, rounded at the ends, 12-15 x 5-6 /i. 



( )n spines of Rosa rubiginosa, West Chester, Pa. 

 B. On leaves and stents of dicotyledonous, herbaceous plants. 



L. cinerascens, (Schw.) 



Sphceria cinerascens, Schw. Syn. N. Am. 1795. 



Sphcerella cinerascens, Cke. in Journ. Bot. 1883. 



Lcestadia cinerascens, in Cooke's Syn. Grev. 18, p. 65 {5227). 



Spots amphigenous, very large, irregular and indeterminate. 

 cinereous below, black above. Peritheeia innumerable, crowded on 

 the spots, very small, black, innate, subacuminate, astomous or at 

 length perforated, scattered or collected and arranged so .as to repre- 

 sent various engraved or sculptured figures. Asci clavate. Sporidia 

 narrow-elliptical, hyaline, 8x2J /Jt. 



On leaves of Asclepias syriaca, Bethlehem, Pa. 



L. Apocyni, E. & E. Proc. Phil. Acad. 1. c. 



Peritheeia gregarious, depressed-spherical, 150-200 fi diam., per- 

 forated above, covered by the cuticle through which they are visible 

 l>\- translucence. Asci clavate-eylindrical, 40-50 x 10-12 p.. Sporidia 

 rrowded-biseriate, oblong, 2- nucleate, obtuse, mostly a little curved, 

 10-15 x 5-6 (i. 



On dead stems of Apocynum, London, Canada (Dearness). 



L. depressa. (Pk.) 



Sphcerella depressa, Pk. 33d Rep. p. 34, (not Sphcerella depressa, Cke. Journ. Bot. 

 1883, Physalospora depressa, Sacc. Syll. 1709). 



Peritheeia numerous, minute, depressed, or even concave when 





