TROPICAL POLYPORES 79 



purplish-tinted, smooth, entire; context soft-corky, homo- 

 geneous, olivaceous-umbrinous, 5 mm. thick; tubes indistinctly 

 stratified, 3-5 mm. long each season, avellaneous to umbrinous, 

 mouths angular, somewhat irregular, 1-2 to a mm., edges thin, 

 entire, umbrinous, purplish-tinted in some specimens; spores 

 obliquely ellipsoid, smooth, 3.5-4 X 2 /*. 



Occasional on dead trunks in Mexico and Central America. 



39. PYROPOLYPORUS Murrill 



Hymenophore large, perennial, epixylous, sessile, ungulate or 

 applanate; surface sulcate, usually anoderm and often rough or 

 rimose; context woody or punky, brown; tubes brown, cylindric, 

 stratose, usually thick- walled ; spores smooth, hyaline. 



Pileus applanate. 



Context red. i. P. albomarginatus. 



Context flavous to luteous. 2. P. Haematoxyli. 



Context ferruginous to fulvous. 



Hymenium isabelline to fulvous. 3. P. Baccharidis. 



Hymenium chestnut-brown. 4. P. Robinsoniae. 



Pileus ungulate. 



Hymenium roseocinereous to smoky-gray. 5. P. roseocinereus. 



Hymenium ferruginous to fulvous. 



Context ferruginous; surface dark-brown, marked 

 with narrow, black, concentric lines; tubes thin- 

 walled, 5 to a mm. 6. P. inflexibilis. 

 Context tawny; surface black, without lines and more 

 sulcate; tubes smaller, thick-walled, 7 to a mm. 7. P. Calkinsii. 



i. PYROPOLYPORUS ALBOMARGINATUS (L6v.) Murrill 



Pileus corky to woody, dimidiate, sessile, thin and conchate or 

 thick and applanate, 5-15 X 10-25 X 1.5-5 cm.; surface sulcate- 

 zonate, velvety or scabrous to glabrous, latericeous, paler red 

 on the marginal zone and white on the immediate margin; con- 

 text punky to corky, orange-red to cinnabar-red ; tubes distinctly 

 stratified in older specimens, minute, about 6 to a mm., whitish 

 to dark-ferruginous, the edges entire. 



This very conspicuous and beautiful species is widely dis- 

 tributed throughout the oriental tropics, having been found 

 several times in the Philippine Islands. The only specimens 

 obtained within our range were collected in British Honduras in 

 1907. These represent the thin, conchate form of the species 

 and are quite different from the type of Fames lateritius Cooke, 

 from South America, which is thick and applanate. For the 



