TROPICAL POLYPORES 37 



entire, often brownish and much deflexed when dry; context 

 white, thin, opaque; tubes decurrent, white when fresh, dis- 

 colored on drying, 3-4 mm. long, mouths large and angular, 

 1-1.5 X 2-2.5 mm., often radially confluent with age, much 

 contorted on drying, edges thin, lacerate, the divisions fimbriate; 

 spores ellipsoid; stipe lateral, slightly tapering downward, lighter 

 than the pileus in dried specimens, minutely tomentose, I cm. 

 long, 5 mm. thick, neither umbilicate above nor scutate below. 

 Found a few times on dead logs in Jamaica and western Cuba. 



u. HEXAGONA CAPERATA (Pat.) Murrill 



Pileus convex, attenuate behind; surface striate, pallid to 

 reddish-brown, with a conspicuous covering of short, grayish 

 hairs, which partly disappear with age; margin more or less 

 incised or lobed, deflexed, neither ciliate nor tessellate; context 

 fleshy, white; tubes deep, white, angular, with large, soft, fleshy, 

 fimbriate dissepiments; spores ovoid-cylindric, 10-12 X 5 /*; stipe 

 wanting, or a mere rounded lateral tubercle. 



Found once in Guadeloupe on a dead trunk of Byrsonima. 



12. HEXAGONA SULFUREA Murrill 



Pileus sulfureous throughout, sessile or attached by a much 

 reduced stipe, very irregular, usually fan-shaped, conchate, I X 

 I X O.I cm.; surface smooth, glabrous, margin lobed and usually 

 splitting deeply with age, much inflexed on drying; context thin, 

 white, fibrous, fragile when dry; tubes shallow, angular, elongate, 

 about 0.5-1 mm. broad, 1-2 mm. long, edges rather thick, entire 

 or dentate. 



Collected once on dead wood in a moist virgin forest at 

 Motzorongo, near Cordoba, Mexico. 



13. HEXAGONA MOTZORONGENSIS Murrill 



Pileus minute, thin, dimidiate, depressed above, convex below, 

 attenuate behind, 2 cm. broad; surface pale-avellaneous-isabel- 

 line, becoming bay on drying, tessellate, minutely hispid- 

 fibrillose; context thin, white, fragile; tubes white, of medium 

 size for the genus, 1-2 mm. long, angular; edges thin, fimbriate, 

 lacerate with age; stipe reduced, furrowed above, hispid- 

 tomentose, pallid, 1-2 mm. long, I mm. thick. 



Collected twice on dead wood in a moist virgin forest at 

 Motzorongo, near Cordoba, Mexico. 



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