TROPICAL POLYPORES 45 



ovoid, 4.5-5 X 3.5-4 Ml stipe central, tough, elastic, slender, 

 equal, chestnut-colored, glabrous, smooth, much compressed in 

 drying, 1-4 cm. long, 1-2 mm. thick. 



Occasional on dead sticks in moist situations in Nicaragua, 

 British Honduras, Porto Rico, and Guadeloupe. Leucoporus 

 dictyoporus Pat., described from Guadeloupe in 1908, is not 

 distinct. 



9. POLYPORUS AEMULANS Berk. & Curt. 



Pileus thin, circular, umbilicate, 3.5-4 X 0.05-0.1 cm.; surface 

 radiate-striate, ochraceous, dark-yellowish-brown when dry, 

 glabrous at maturity; margin thin, straight, subcinereous, 

 finely hispid, irregularly incised or lobed, sterile for 1-2 mm.; 

 context tough, membranous, pallid to pale-brown; tubes decur- 

 rent, yellowish, less than I mm. long, gradually disappearing 

 near the margin, mouths alveolar, shallow, 2 to a mm., usually 

 radially elongate, edges acute, becoming somewhat elongate; 

 stipe central, equal, coffee-colored, pulverulent, expanding into 

 the pileus, 2 cm. long, 3-4 mm. thick. 



Found once on dead wood in Cuba. 



10. POLYPORUS ARCULARIUS (Batsch) Fries 



Pileus circular, convex, umbilicate, 1-2.5 X 0.1-0.2 cm.; 

 surface azonate, concentrically rugose when dry, fuscous- 

 squamulose to fulvous and nearly glabrous; margin acute, ciliate- 

 dentate, straight, inflexed on drying; context white, membranous; 

 tubes slightly decurrent, rather firm, white to brownish, 1-2 

 mm. long, mouths large, oblong- rhomboid, 1-2 to a mm., edges 

 thin, elongate, denticulate; spores cylindric, pointed at the ends, 

 2-guttulate, copious, 7-8X1.5-2.5/1; stipe central, slender, 

 even, fuscous-gray to fulvous, subsquamulose to glabrous above, 

 hispid-tomentose at the base, 2-4 cm. long, 2-3 mm. thick. 



Occasional on dead wood in Mexico, Costa Rica, Jamaica, 

 and Cuba; frequent in southern Florida. 



ii. POLYPORUS VARIIPORUS Murrill 



Pileus orbicular, convex to depressed, 1-2.5 X 0.1-0.2 cm.; 

 surface glabrous, more or less radiately striate, somewhat con- 

 centrically rugose, straw-colored to isabelline, fulvous to chestnut- 

 colored around the margin, which is thin, inflexed, undulate, 

 finely ciliate, the cilia being fugacious; context 1-1.5 mm - thick, 

 tough, white; tubes 0.5 mm. in length, 2-4 mm. in diameter, 

 very irregular, much elongate radially near the stipe or in the 

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