TROPICAL POLYPORES 25 



Pileus 1-2 cm. thick; tubes 1-2 to a mm. i. S. luridescens. 

 Pileus less than i cm. thick. 



Tubes small, 6 to a mm. 2. 5. hydrophilus. 



Tubes large, 1-3 to a mm. 3. 5. substuppeus. 



i. SPONGIPELLIS LURIDESCENS Murrill 



Pileus compressed-ungulate, subimbricate, dimidiate, plane 

 below, 3 X 5 X 1-2 cm.; surface smooth, spongy-tomentose, 

 azonate, isabelline to fulvous or fuliginous; margin rather thick, 

 either acute or rounded, entire, sterile, concolorous; context soft, 

 punky, white to discolored, 3-5 mm. thick, 5-8 mm. long, white 

 to isabelline within, darker near the mouths, which are circular 

 to angular, sinuous and slightly irpiciform behind, 1-2 to a mm., 

 edges thin, firm, corky, entire to lacerate, isabelline to fuliginous 

 with age; spores ellipsoid, 3-4 X 1-2 ju. 



Found once at Hall's Delight, Jamaica, on old stumps. 



2. SPONGIPELLIS HYDROPHILUS (Berk. & Curt.) Murrill 



Pileus thin, somewhat cespitose, flabelliform, attached by a 

 tubercle, fleshy and very watery when fresh, becoming rigid and 

 contorted when dry, 2-3 X 3-5 X 0.2-0.4 cm - 5 surface isabelline, 

 finely hispid-tomentose, zonate and concentrically furrowed near 

 the margin, which is very thin, incurved and bay to black in 

 dried specimens; context fleshy to rigid and hard, white to 

 slightly yellowish, 1-2.5 mm. thick; tubes short, 1-1.5 nirn. long, 

 white to isabelline within, mouths minute, circular to angular, 

 6 to a mm., collapsing, edges thin, dentate, white to isabelline, 

 glistening. 



Found a few times on logs in Cuba and British Honduras. 



3. SPONGIPELLIS SUBSTUPPEUS (Berk. & Cooke) Murrill 



Pileus simple or imbricate, dimidiate, umbonate-sessile or 

 broadly attached, decurrent, 3-4 X 4-7 X 0.3-0.8 cm.; surface 

 floccose, substuppeous, spongy, azonate, pale-ochraceous to dis- 

 colored; margin thin, entire, easily discolored; context soft, 

 fibrous-spongy, white to discolored, 1-3 mm. thick; tubes 2-4 

 mm. long, white to pale-latericeous within, mouths large, ir- 

 regular, angular, radially elongate at times, 1-3 to a mm., 

 edges thin, dentate, white to umbrinous; spores globose, 5-7 /*. 



Found a few times on dead wood in Cuba, as well as in Brazil. 



8. BJERKANDERA P. Karst. 



Hymenophore annual, epixylous, sessile, anoderm, glabrous, 

 azonate, corky; context white, tough or woody, not friable when 



