1894.] NATURAL SCIENCES OF PHILADELPHIA. 345 



diara., tobacco-color inside, not circumscribed, crowded above with 

 the dense, flat- topped orbicular or elliptical fascicle of hemispheri- 

 cal, smooth, soon broadly and irregularly perforated ostiola, which 

 raise and pierce the epidermis with an orbicular opening or oftener 

 protrude through transverse cracks. Perithecia irregularly poly- 

 stichous, small (110-150//.), black and shining inside, numerous, 

 subglobose. Asci clavate-cylindrical, short-stipitate, 65-70x8-10;/, 

 polysporous, paraphysate. Sporidia irregular crowded, yellowish in 

 the mass, allantoid, 5-6x1//. 



Phyllachora asterigena E & E. 



On living leaves of Aster oblongifolws, Rockport, Kansas, Aug. 

 1893 (Bartholomew, No. 1,040). (Stylospores. ) 



Forming orbicular or elongated, black patches, 2—6 mm. in extent, 

 on the under side of the leaves. Stroma thin, gray inside, surface 

 roughened by the prominent, conic-hemispherical, perforated ostiola. 

 Ascigerous cells numerous, subglobose, about 100// diam. Sporules 

 oblong or cj'lindrical, hyaline, uniseptate, slightly constricted at the 

 septum, obtuse, 15— 25 x 4-4 1//.. 



This does not seem to be Dothidea Haydeni, B. & C. , which is 

 represented as growing on the stems and having "sporidia linear, 

 attenuated at each end." 



Dothidea Solidaginis Schw. has a different habit, stromata numer- 

 ous, scattered, tuberculiform and mostly less than 1 mm. diam. 



Hypoxylon occidentale E. & E. 



On dead limbs and trunks. Pasadena, Cal. (Prof. A. J. McClat- 

 chie). 



Stroma hemispheric-tuberculiform, superficial, sessile, 2-10 cm. 

 diam., surface roughened by the large, hemispherical ostiola, and 

 clothed with a thin coat of short, olivaceous hyphse, bearing globose, 

 ovate, or oblong-cylindrical conidia, nearly hyaline and continuous 

 at first, finally pale brown and 1-3 septate, 4-15x4-5/'. Perithecia 

 peripheral, l-lixl-l mm. Asci cylindrical, 120-150 (p. sp. 

 about 100) x6-7/', paraphysate, 8-spored. Sporidia uniseriate, ob- 

 long-elliptical, subinequilateral, olive-brown, 14-16x6-7/'. 



Has the aspect of Daldinia concentrka, but not zonate withi)% the 

 inner substance consisting of a compact mass of radiating, sooty black 

 fibers with a silky luster. The species is allied to H. malleolus 

 B. & R. , from which it is distinguished by its more prominent ostiola 



