48 TROPICAL POLYPORES 



ciliate; context white or pallid, corky, 1-5 mm. thick; tubes pale- 

 avellaneous, 1-3 mm. long, cylindric, mouths angular to sub- 

 circular, entire, at first white, glistening, pale-umbrinous with 

 age,4~5 to a mm., edges thin, entire ; spores oblong, 7-8 X 3-3.5 MI 

 stipe eccentric or lateral, rarely central, woody, smooth, pallid 

 above, abruptly black and scutate below, 1-4 cm. long, 2-5 mm. 

 thick. 



Occasional on fallen dead branches at Jalapa, Mexico. 



1 8. POLYPORUS SUBELEGANS Murrill 



Pileus flabelliform, convex, often attenuate at the base, 1-2 X 

 *-5~ 2 -5 X o.i cm.; surface delicately radiate-striate, glabrous, 

 isabelline to pale-umbrinous when dry; margin acute, entire, 

 undulate to lobed, rarely inflexed; context pallid, corky, 0.5 

 mm. thick; tubes pale-umbrinous, I mm. long, cylindric, mouths 

 white when young, perfectly circular, exceedingly minute, 10 

 to a mm., edges thick, entire; stipe short, lateral, solid, woody, 

 scutate at the base, black, pruinose, rugose, 2-5 mm. long, 2-3 

 mm. thick. 



Frequent on dead sticks in Mexico, Nicaragua, and Jamaica. 



19. POLYPORUS DIABOLICUS Berk. 



Pileus circular, umbilicate, convex, 3-10 X 0.2-0.4 cm.; sur- 

 face bright-bay to almost black, usually radiate-striate, pruinose 

 to glabrous, sometimes proliferous; margin rather thin, entire, 

 concolorous to crenate or lobed, at first straight, becoming 

 slightly deflexed; context white or pallid, corky, 1-3 mm. thick; 

 tubes white to umbrinous, 1-2 mm. long, mouths minute, circular, 

 4-6 to a mm., edges thick, entire; stipe central, solid, woody, 

 equal or slightly tapering upward, concolorous, glabrous, 3-8 cm. 

 long, 3-10 mm. thick. 



Occasional on dead trunks in Mexico and Central America, 

 as well as in South America. 



20. POLYPORUS MARBLEAE Murrill, sp. nov. 



Pileus very convex above and concave below, laterally 

 attached, 6 X 8 X 1-2 cm.; surface smooth, glabrous, shining, 

 fuliginous, margin acute, concolorous, undulate, shortly inflexed 

 on drying; context white, fragile, homogeneous, about 7 mm. 

 thick; hymenium pale-avellaneous when young; tubes equaling 

 the thickness of the context, minute, whitish or yellowish, thin- 

 walled, the edges becoming fimbriate-lacerate; stipe short, 

 lateral, avellaneous or slightly darker, smooth, glabrous, marked 



