io TROPICAL POLYPORES 



6 X O.I cm.; surface villose-tomentose, uniformly milk-white, 

 marked with a few, indistinct, concentric furrows of variable 

 width and depth; margin very thin, flaccid, entire to undulate, 

 rarely lobed; context white, soft, tough, less than I mm. thick; 

 tubes punctiform, white, less than I mm. long, mouths angular, 

 irregular, 4-5 to a mm., soon lacerate, but not becoming irpici- 

 form, edges very thin, flaccid, lacerate-dentate, white, stramine- 

 ous in dried specimens. 



Collected once on a dead hardwood trunk in the forest near 

 Alto Cedro, Cuba. 



9. CORIOLUS CONCAVUS Murrill 



Pileus deeply concave, scutate-conchate, narrowly or rather 

 broadly attached behind or by the vertex, rather thick, subrigid 

 when dry but of corky texture, subimbricate, 2 X 3-5 X 0.2-0.8 

 cm.; surface finely tomentose, white, irregular, slightly once or 

 twice sulcate, margin rather thick, entire or lobed, concolorous, 

 not inflexed on drying; context punky, white; tubes rather long 

 for the genus, reaching 3-4 mm., at first white, changing to 

 cremeous, mouths irregular, angular, large, 2 to a mm., edges 

 thin, uneven to slightly dentate. 



Collected once on dead wood in a moist forest near Orizaba, 

 Mexico. 



io. CORIOLUS ARMENICOLOR (Berk. & Curt.) Pat. 



Pileus very thin, flexible, flabelliform, attenuate behind, 2-3 X 

 I -5~3-5 X O.I cm., surface multizonate, minutely longitudinally 

 striate, shining, glabrous, radiately plicate, at least when dry, 

 isabelline with fulvous or pale-bay zones; margin very thin, 

 lobed or incised; context membranous, coarsely fibrous, white, 

 less than I mm. thick; tubes less than 0.5 mm. long, white to 

 pallid within, mouths angular, minute, 7-8 to a mm., edges very 

 thin, dentate, white when young, glistening, fulvous in dried 

 specimens. 



Occasional on dead wood in Cuba, Porto Rico, Jamaica, and 

 Honduras. 



ii. CORIOLUS BRACHYPUS (Lev.) Murrill 



Pileus thin, coriaceous, firm, flexible, imbricate, dimidiate to 

 flabelliform, sessile or attached by a short tubercle, 4-6 X 5-12 

 X 0.2-0.4 cm.; surface glabrous or nearly so, slightly radiately 

 furrowed, multizonate, pallid to isabelline, usually rose-tinted; 



