36 TROPICAL POLYPORES 



ing glabrous, white, yellowish when dry; margin thin, denticu- 

 late, slightly incurved when dry, frequently brown and hygro- 

 phanous; context white, membranous, translucent; tubes de- 

 current, white, 2 mm. long, 4-6-angled, mouths 1X3 mm., at 

 length radially confluent, edges thin, lacerate; spores ellipsoid, 

 2-guttulate, 3 X lOju; stipe lateral, short, slightly enlarged 

 below, concolorous, hispid, 3-5 mm. long, 2-3 mm. thick, usually 

 umbilicate above. 



Found a few times on dead wood in Cuba, Santo Domingo, 

 and Jamaica. 



8. HEXAGONA FRAGILIS Murrill 



Pileus flabelliform, convex, depressed behind, 2-3 X 2-4 X 

 0.1-0.3 cm.; surface densely hispid, especially behind, faintly 

 radiate-striate, pure-white, becoming straw-colored on drying; 

 margin quite thick for the genus, nearly regular in outline, 

 usually inflexed when dry, partly hygrophanous at times, beset 

 with short, fimbriate, fugacious hairs; context thin, white, 

 partially translucent, quite fragile when dry; tubes decurrent, 

 white, 2-3 mm. long, 4-6-angled, mouths 1X4 mm., becoming 

 radially confluent and gill-like, edges thin, lacerate, the divisions 

 fimbriate; spores ellipsoid, 4-5 X 10 /r, stipe lateral, subequal, 

 concolorous, hispid, short, 5 mm. long, 2.5 mm. thick, rarely 

 umbilicate above. 



Frequent on dead wood in Cuba, Jamaica, and Grenada. 



9. HEXAGONA RENIFORMIS Murrill 



Pileus reniform, slightly convex, 2-4 X 2-4.5 X 0.2-0.4 cm.; 

 surface densely tomentose, tessellate near the margin, pallid, 

 yellowish -brown on drying; margin undulate, rather thick, 

 entire; context fleshy-tough, membranous, white, partially trans- 

 lucent; tubes not decurrent, white, becoming yellowish-brown 

 on drying, 1-2 mm. long, 4-6-angled, mouths 1.5 X 2-2.5 mm., 

 edges entire; spores ellipsoid; stipe lateral, equal, concolorous 

 or lighter, tomentose, 0.5-1 cm. long, 2.5-5 rnm. thick, not 

 umbilicate above. 



Collected once on decayed deciduous wood in hammocks near 

 the Homestead Trail, Florida, and four times at Motzorongo, 

 Mexico. 



10. HEXAGONA SUBCAPERATA Murrill 



Pileus flabelliform, convex, somewhat attenuate and depressed 

 behind, 4-6 X 5-8 X 0.3-0.5 cm.; surface distinctly tomentose, 

 pale-ochraceous, rather coarsely checkered; margin abruptly acute, 



