8o NEW YORK STATE MUSEUM 



species, but in general coloration, rhizomorphic mycelial strands, 

 and spores, the two are alike. 



Specimens referred by the writer to Poria vaillantii 

 (DC.) Fries, differ in the nearly pure white color and the larger 

 spores. 



The collections available for examination are not attached to the 

 substratum and consequently give no idea of the nature of the 

 decay produced. Both collections are said by Peck to be on maple 

 wood. The data at present on the type collections does not cover 

 this point. 



Redescription. Effused, 6 to 15 cm long, 1.5 to 7 cm broad, 

 separable, with or without a narrow (i to 3 mm), white, subfim- 

 briate margin, often with small white rhizomorphic strands ; subi- 

 culum exceedingly thin, white, scarcely discernible in mature speci- 

 mens; tubes sometimes nearly 2 mm long but often shorter, their 

 mouths whitish inclining to cream color (when fresh ?, fide Peck), 

 cinnamon buff' to warm buff or light ochraceous buff in herbarium 

 specimens, more or less angular, with rather thin dissepiments, 

 sometimes lacerated and the hymenium somewhat irpiciform, 

 averaging 4 to 5 to a millimeter ; spores ellipsoidal, smooth, hyaline, 

 minute, 2.5 to 3.5x2 fi; basidia 2.5 to 3 /x in diameter; cystidia 

 abundant, 10 to 15 /x in diameter at the thickest part, projecting 

 prominently for 10 to 30 [x., the tips pointed and encrusted with 

 coarse granules, the base embedded in the trama and unencrusted ; 

 tramal tissue fairly compact, composed of thin-walled, colorless, 

 somewhat branched hyphae, 2 to 3.5 /x, in diameter; subiculum 

 hyphae nearly simple, 2 to 4 /x in diameter; clamp connections 

 lacking; cross walls invisible. 



On prostrate trunks of maple. 



Type locality: Osceola, N. Y. C. H. Peck. Also collected at 

 Ampersand pond, N. Y., on maple trunk. C. H. Peck. Not other- 

 wise known to the writer. 



Poria griseoabla (Peck) Sacc. 



Plate s, figure 8; plate 6, figures i-s 



Syll. Fung. 6: 306. 1SS8. 



Polyporus (Physisporus) griseo-albus Peck, 38lh Rcp't 

 N. Y. State Mus., p. qi. 1885. 



Original description. Effused, thin, tender, adnate, uneven, 

 scarcely margined, indeterminate, grayish-white, with a thin pul- 

 verulent subiculum ; pores very minute, subrotund, often oblique. 



