TROPICAL POLYPORES 49 



above with the decurrent tubes, about 2 cm. long and 1-1.5 cm- 

 thick. 



Type collected on dead wood at Mount Morales near Utuado, 

 Porto Rico, March 19, 1906, Elizabeth G. Britton & Delia W. 

 Marble 1216 (herb. N. Y. Bot. Card.)- It is known only from 

 this single collection, which, unfortunately, was attacked by 

 insects while developing and the tubes are consequently ab- 

 normal. 



21. POLYPORUS BLANCHETIANUS Berk. & Mont. 



Pileus semicircular or reniform, plane or slightly convex, 2-5 

 cm. broad, 0.5 cm. thick; surface bay to black, very glabrous, 

 often striate or slightly veined ; margin acute, entire to wavy or 

 lobed; context corky, pallid to brownish, 2-4 mm. thick; tubes 

 very short, minute, circular or subangular, pallid to umbrinous, 

 1-2 mm. long, 5-6 to a mm., edges thick, entire; spores oblong, 

 inequilateral, 6-7 X 2-3 n; stipe lateral to eccentric, short, 

 black, opaque, punctulate, 2-10 mm. long, 2-3 mm. thick. 



Frequent throughout on dead wood ; also in South America. 



22. POLYPORUS SCABELLUS (Pat.) Murrill 



Pileus semicircular or nearly reniform, plane, slightly elevated 

 behind, 3-8 X 4-10 X 0.1-0.5 cm.; surface bright-chestnut- 

 colored, finely radiate-striate or marked with rows of serrated, 

 black squamules; margin straight, acute, entire; context white, 

 becoming brownish on drying, membranous; tubes very short,, 

 not decurrent, mouths light-brown, more or less tinged with 

 fuliginous near the stipe, round, very small, the dissepiments, 

 thick; stipe eccentric, horizontal, cylindric, very short, black,, 

 minutely velvety, marked with punctate depressions, 3-4 mm. 

 long, 3-6 mm. thick, inserted upon a black, orbicular disk. 



Occasional on dead hardwood trunks in Guadeloupe. 



23. POLYPORUS PRAEGUTTULATUS Murrill 



Pileus subcircular in outline, convex above, nearly plane below, 

 attached by a decurrent base, which causes the hymenophore to 

 appear triangular in section, 4 X 4.5 X 0.5-2.5 cm.; surface 

 smooth, latericeous, with a coating of fine, grayish tomentum, 

 which disappears in numerous subcircular spots; margin slightly 

 upturned, abruptly acute, concentrically striate, entire, creme- 

 ous; context pallid, soft-corky, homogeneous, I cm. thick behind; 

 tubes stramineous, 3-4 mm. long, mouths subcircular to angular, 



