TROPICAL POLYPORES 53 



usually white in dried specimens, 3-7 mm. thick; tubes annual, 

 2-3 mm. long, sulfur-yellow within, mouths minute, angular, 

 somewhat irregular, 3-4 to a mm., edges very thin, lacerate, 

 sulfur-yellow, the color fairly permanent in dried specimens; 

 spores ovoid, smooth or finely papillate, 6-8 X 3-5 M. 



Occasional in Cuba and Mexico on living trunks of various 

 trees, causing heart-rot. This species is cosmopolitan, but 

 evidently does not thrive under tropical conditions. 



21. PHAEOLOPSIS Murrill 



Hymenophore annual, epixylous, stipitate; surface azonate, 

 anoderm, yellow or brown; margin acute; context yellow, fleshy 

 to tough and fibrous, not friable; tubes yellow, regular, minute, 

 thin-walled; spores smooth, hyaline; stipe eccentric or lateral, 

 with substance and surface like that of the pileus. 



i. PHAEOLOPSIS VERAE-CRUCIS (Berk.) Murrill 



Pileus fleshy to tough, becoming rigid, flabelliform, with stipe 

 lateral or eccentric, depressed behind, 5-6 X 7-8 X 0.2-0.3 cm.; 

 surface glabrous, radiate-striate, bright-fuscous, darker with age; 

 margin acute, undulate to lobed, inflexed when dry; context 

 dark-yellowish-orange in dried specimens, rhubarb-yellow when 

 fresh, tough and fibrous, glistening, 1-2 mm. thick; tubes annual, 

 about i mm. long, rhubarb-yellow when fresh, becoming fuscous, 

 mouths minute, circular, regular, 6-7 to a mm., edges thin, 

 equal, entire; stipe attenuate below, rhubarb-yellow when fresh, 

 rough, slightly tomentose, resembling the context within. 



Collected once in Vera Cruz, Mexico, growing on the roots 

 of trees, and once on dead wood in British Honduras. 



22. CERRENELLA Murrill 



Hymenophore thin, effused-reflexed, annual, epixylous; surface 

 brown, zonate, anoderm, margin thin; context thin, coriaceous, 

 brown; hymenium at first poroid, very soon becoming irpiciform, 

 the teeth irregular and compressed ; spores smooth, hyaline. 



Pileus very thin, i mm. or less in thickness. 



Hymenium ferruginous, unchanging. i. C. Ravenelii. 



Hymenium olivaceous, becoming cinereous. 2. C. farinacea. 



Pileus 3-7 mm. thick; hymenium chestnut-colored to almost 



black. 3. C. subcoriacea. 



