44 TROPICAL POLYPORES 



5. POLYPORUS CYATHIFORMIS Lev. 



Pileus deeply infundibuliform, 5-8 X 0.1-0.3 cm.; surface 

 glabrous, rufous, very rugose when dry; margin thin, pellucid, 

 entire, fertile, much deflexed in herbarium specimens; context 

 fleshy, fragile when dry, white to pallid, 1-2 mm. thick; tubes 

 decurrent almost to the base of the long stipe, I mm. long, 4-5 

 to a mm., white to yellowish-brown, mouths angular, quite 

 regular, edges thin, fragile, subentire to elongate, more or less 

 collapsing on drying; stipe central, solid, somewhat curved, 

 concolorous with the hymenium, pulverulent, 2.5-4 cm. long, 

 4-6 mm. thick. 



Occasional on dead logs in Cuba and Santo Domingo. P. 

 craterellus is not distinct. 



6. POLYPORUS ACICULA Berk. & Curt. 



Pileus circular, convex, umbilicate, resembling a minute 

 Omphalia in shape, 2 X 0.5 mm.; surface glabrous, minutely 

 concentrically rugose when dry, yellowish-brown in the single 

 type specimen; margin acute, involute; context membranous, 

 white; tubes small, alveolar; stipe central, filiform, reddish- 

 brown when dry, glabrous above, slightly villose at the base, 

 6 mm. long, 0.25 mm. thick. 



Found once on dead wood in Cuba. 



7. POLYPORUS DISCOIDEUS Berk. & Curt. 



Pileus circular, plane, 10-12 cm. in diameter, 1-2 cm. thick 

 at the center, tapering to a few millimeters near the periphery; 

 surface smooth, glabrous, pale-ochraceous to umbrinous; margin 

 darker, thin, straight, entire; context white to yellowish, very 

 soft-corky, elastic, 0.5-1 cm. thick; tubes pallid to dull-brown, 

 mouths subangular, becoming sinuose, 2 to a mm., edges thin, 

 elongate-dentate, collapsed when dry; stipe central, thick, even, 

 hispid, concolorous above, darker and radicate below, 6 cm. 

 long, 1.5-2 cm. thick. 



Found once on dead wood in Cuba. 



8. POLYPORUS OBOLUS Ellis & Macbr. 



Pileus circular, plane, 1-2.5 X 0.03-0.08 cm. ; surface minutely 

 tomentose, radiate-rugose, isabelline, fulvous at the center; 

 margin straight or repand, even, glabrous, entirely devoid of 

 teeth or cilia; context 0.2-0.7 mm. thick, tough, white, trans- 

 lucent, especially near the margin; tubes o.i mm. long, 8 to a 

 mm., adnate, white, cylindric, regular, edges thick, entire; spores 



