1920] 



BURT THELEPHORACEAE OF NORTH AMERICA. XII 109 



Jamaica: Castleton Gardens, W. A. & Edna L. Murrill, 66, 



comm. by N. Y. Bot. Gard. Herb. 

 Trinidad: R. Thaxter (in Farlow Herb.). 

 Grenada: W. E. Broadway, September collection (in N. Y. Bot. 



Gard. Herb, and Mo. Bot. Gard. Herb., 56316) ; St. George's, 



W. E. Broadway (in N. Y. Bot. Gard. Herb, and Mo. Bot. 



Gard. Herb., 56317). 

 British Honduras: M. E. Peck (in N. Y. Bot. Gard. Herb, and 



Mo. Bot. Gard. Herb., 56321). 



19. S. pusiolum Berk. & Curtis, Linn. Soc. Bot. Jour. 10: 330. 

 1868; Sacc. Syll. Fung. 6: 558. 1888; Massee, Linn. Soc. Bot. 

 Jour. 27: 168. 1890; Lloyd, Myc. Writ. 4: Stip. Stereums, 39. 

 1913. Plate 3, fig. 17. 



Type: in Kew Herb, and Curtis Herb. 



Fructifications gregarious, stipitate, coriaceous, curling in 

 drying; pileus flabelliform or wedge-shaped, tapering to the 

 stem, more or less split when large, minutely tomentose or 

 hoary, white at first, drying smoke-gray, the margin thick and 

 entire; stem short, solid, a little larger towards the base, colored 

 like the pileus; hymenium even, mouse-gray, thick, contracting 

 and sometimes cracking in drying; pileus in section 400-800 

 fx thick, composed of closely and longitudinally arranged hyaline 

 hyphae 2\ Aiin diameter; no cystidia, gloeocystidia, nor conduct- 

 ing hyphae; spores hyaline, even, apiculate at base, 4-5 \ X 3-5 \i. 



Fructifications 1-2 cm. high, 1-15 mm. broad; stem 5-8 mm. 

 long, \-\\ mm. thick. 



On clay ground. West Indies. November to March. 



The white pileus, drying gray of nearly the shade of Polyporus 

 adustus, minutely hairy, wedge-shaped, and without zonation, 

 the much darker hymenium dark as in P. adustus the rather 

 large spores, and the absence of gloeocystidia afford a group of 

 characters highly distinctive for Stereum pusiolum, the descrip- 

 tion of which I have changed materially from that published 

 by the authors of the species. They disregarded Wright's note 

 that the specimens were white and were collected on banks by 

 roadside and published instead "rufobrunneum" and "on root- 

 lets." The recent collections, cited below, which I have com- 

 pared with the type, show also that the dimensions of the fructi- 

 fications are usually much larger than those of the type collection. 



