AN STE VR 
EOM MER AAN S 
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; Saec. 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 
u thick, composed of closely and longitudinally arranged hyaline 
hyphae 23 y in diameter; no cystidia, gloeocystidia, nor conduct- 
ing hyphae; spores hyaline, even, apiculate at base, 4-51 X 3-5 y. 
Fructifications 1-2 cm. high, 1-15 mm. broad; stem 5-8 mm. 
long, 3-13 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. 
