82 



briefly stipitate, 60-75 /i long (p. sp.), 4-5 (i thick. Sporidia 8 in an 

 ascus, uniseriate, composed of two similar, ovate, hyaline cells about 

 4Jx3J /i. 



On old Polyporus, Ohio (Morgan). 



H. polyporoidea, B. & C. Grev. IV, p. 15. 



"Fawn-colored. Perithecia free, torn entose, with a naked ostiolum, 

 seated on a pale crust, here and there elevated and thinner towards 

 the margin. A very curious species." Cooke, in Grev. 1. c, gives 

 the hyaline, subglobose cells of the sporidia as 5 fi in diam. 



H. sulphiirea (Schw.) 



Sphczria sulphurea, Schw. Syn. N. Am. 122 l. 



"Rather thin, subcarnose, at length horn-like in texture (when 

 dried), the thin, partially free margin variously lobed, sulphur-color, 

 white within. Perithecia crowded, globose-depressed, immersed, dirty- 

 yellow. Ostiola concolorous, papillate, situated in little pit-like de- 

 pressions of the otherwise smooth surface. On bark; rare; separable 

 when fresh, subrotund, \\ inches across." In Grev. 1. c, the globose 

 cells of the hyaline sporidia are said to be 5 /i in diam. 



H. pallida, E. & E. Journ. Mycol. II, p. 65, and Proc. Acad. Nat. 

 Sci. Phila. July, 1890, p. 245. 



Perithecia pale horn-color, subglobose (250 /i), immersed in a 

 rather scanty, loose, white tomentose mycelium (stroma), which over- 

 spreads the surface of the pores and covers the sides of the perithecia 

 themselves, leaving their apices and papilliform ostiola bare. Asci 

 cylindrical, 65-75 x4-4| /i, containing eight oblong-elliptical, 2-celled, 

 hyaline sporidia, the cells subcubical or nearly globose, 3 fi diam. and 

 readily separating. The upper part of the perithecium collapses when 

 dry, and, in old or weather-beaten specimens, the tomentose stroma 

 disappears, leaving the perithecia sessile on the pores. We have seen 

 no specimens of H. polyporoidea, B. & C., but our species will be 

 distinct from that, in the absence of any crust-like stroma and in its 

 smaller sporidia. It was first found in October, 1880, and again in 

 October, 1886. 



Parasitic on decaying Polyporus ccesius, Newfield, N. J. 



Specimens found by Dr. Macoun in Prince Edward's Island, on 

 Pol. chioneus, Fr., agree perfectly with the Newfield specimens, only 

 there is an orange-colored mycelium which stains the Polyporus within 

 of a fine, light yellow. 





