607 



Stromata scattered or gregarious, epiphyllous, orbicular, flattened, 

 1-1| mm. diam., superficial and easily deciduous, black. Cells numer- 

 ous, globose, 75 u diam. Asci oblong, 40-50 x4-6 //. 



On living leaves of Magnolia and Laurus Caroliniensis, South- 

 ern States; common. 



D. Vaccinii, Rostr. F. Groenl. p. 566. 



Spharia conferta, Fr. S. M. II, p. 435? 



Stromata hypophyllous, irregularly angular, scattered, tuberculose 

 from tlie projecting perithecia, black, about 1 mm. diam. Asci elon- 

 gated-clavate, stipitate, 80-130 x 6-8 /i, 8-spored. Sporidia uniseriate, 

 or biseriate above, oblong-ellipsoid, uniseptate, yellowish-hyaline, with 

 a short appendage at each end, 16-20x5-6 u. 



On living leaves of Vaccinium ulignosum, Itivnek, Sukker- 

 toppen, &c., Greenland. 



D. Aristidse, (Schw.) 



SpkcEria Aristidcs, Schw. Syu. N. Am. 1471. 

 Phyllachora AristidiB^ Sacc. SyU. 5230. 

 Exsicc. Ell. N. A. F. 86. 



Stroma effused, thin, black, interruptedly continuous over both 

 sides of the leaves and enveloping the culms for several cm. in extent, 

 causing them to appear charred. Ascigerous cavities small, mostly 

 less than 75 // diam., subglobose and seriate between the parallel 

 nerves of the leaves. Asci subglobose, 15-25 p. diam., sessile, 8-spored. 

 Sporidia inordinate, subelliptical, or ovate-oblong, obtuse, hyaline, uni- 

 septate, 8-12 X 5-6 //. 



On dead culms and leaves of Aristida dichotoma, North Caro- 

 lina (Schw.), New Jersey (Ellis), on Distichlis maritima, Oregon, 

 and on Aristida purpurascens, Mississippi (Tracy). 



The Oregon specc. are well matured and show the asci and spo- 

 ridia distinctly. Newfield specc. also show immature asci and in parts 

 of the same stroma, abundant oblong-clavate, hyaline stylospores 1 2- 

 15x3 /.(, on short basidia. Schweinitz says perithecia comparatively 

 large, but we find them as noted both in specc. in Herb. Schw. and 

 from the other localities. 



D. TJlmi, (Duv.) 



Spheeria Ulmi, Duval in Hoppe. Bot. Taschenb. 1809, p. 105. 



Spharia ulmaria, Sow. Eng. Fungi, tab. 374, fig. 3. 



Xyloma ulmeum. Mart. Fl. Erlang, p. 309. 



Sphceria xylomoides, DC. Fl. Fr. II, p. 2S8. 



Dothidea Ulmi, Fr. S. M. II, p. 555. 



Phyllachora Ulmi, Fckl. Syrab, p. 218. 



Dothidella Ulmi, Winter, Pilze, II, p. 904. 

 Exsicc. Fckl. F. Rh. 1013.— Rab. Herb. Myc. 658.— Thum. F. Austr. 499.— id. M. U. 2064. 

 Sydow, M. March. 256.— Linh. F. Hung. 374.— Eritas. F. Scand, 292.— Briosi and 

 Cavara F. Farass. 73.— Desm. PI. Cr. Ed. I, 284.— Cke. F. Brit. Ser. I, 184. 



