24 TROPICAL POLYPORES 



13. TYROMYCES ALBOGILVUS (Berk. & Curt.) Murrill 



Pileus dimidiate to flabelliform, sometimes attached by a very 

 narrow base, fleshy, rigid when dry, convex above, plane below, 

 2.5 X 2.5-3 X 0.4-0.7 cm.; surface finely tomentose to resinous- 

 glabrous, gilvous when fresh, azonate, somewhat radiate-rugose; 

 margin rather thick, often obtuse, entire, concolorous; context 

 thin, white, fleshy to fragile, I mm. thick; tubes long, slender, 

 4-6 mm., white or pale-yellowish, mouths minute, angular, 6 to a 

 mm., glistening, white or pale-yellowish, usually abruptly 

 radially elongate near the margin, presenting the appearance of 

 lamellae, edges thin, entire or slightly dentate. 



Occasional on dead trunks in woods in Cuba, Porto Rico, 

 Jamaica, and British Honduras. 



14. TYROMYCES FULVITINCTUS (Berk. & Curt.) Murrill 



Pileus fleshy- tough, rigid and fragile when dry, sessile, dimidi- 

 ate, applanate, decurrent, 3-4 cm. broad, 3-5 mm. thick; surface 

 tomentose, alutaceous-fulvous, becoming glabrous behind, azo- 

 nate, subsulcate, margin rather thick, fertile, entire or undulate; 

 context homogeneous, corky-fragile, whitish to isabelline, 1-2 

 mm. thick; tubes short, 2-3 mm. long, white to isabelline or 

 avellaneous, mouths small, circular to angular, pale-umbrinous 

 in dried specimens, edges thin, obtuse, entire; spores subglobose 

 to ovoid, 3-4 p. 



Found a few times on dead wood in Cuba and once in Grenada. 



15. TYROMYCES DURACINUS (Pat.) Murrill 



Pileus convex, rigid, hard, 1.5-2.5 cm. broad, 2-4 mm. thick; 

 surface isabelline to pale-fulvous, darker near the margin, 

 glabrous, marked with 1-2 concentric furrows; margin inflexed, 

 usually acute; context hard, fragile, white, 1-2 mm. thick; tubes 

 I mm. long, white to discolored, mouths small, circular, 5 to a 

 mm., edges white to avellaneous, obtuse, entire; spores cylindric, 

 4 X i/x. 



Found once in Guadeloupe on dead branches of Cecropia 

 peltata. 



7. SPONGIPELLIS Pat. 



Hymenophore annual, epixylous, sessile, dimidiate, simple or 

 imbricate, rather large; surface white, anoderm, sodden and 

 bibulous; context white, duplex, spongy above, firm below; 

 hymenium concolorous, tubes thin-walled; spores smooth, 

 hyaline. 



