TROPICAL POLYPORES 



55 



black, zonate, anoderm, rarely encrusted with age, hairy; margin 

 thin; context thin, coriaceous to woody, isabelline to purplish- 

 umbrinous, rarely almost white; hymenium concolorous; tubes 

 small, regular, thin-walled, entire; spores smooth, hyaline. 



Pileus isabelline to fulvous. 



Pores inconspicuous; pileus papery-thin, very soft and 



flexible. 

 Pores conspicuous. 



Hymenium isabelline; pileu usually thick and firm. 

 Hymenium whitish or grayish, at least until matur- 

 ity; pileus thin, 1-3 mm., flexible, often nar- 

 rowly reflexed or entirely resupinate. 

 Surface and hymenium whitish to isabelline. 

 Surface isabelline to fulvous or whitish-cinereous; 



hymenium murinous to umbrinous. 

 Tubes i2 mm. long, 34 to a mm. 

 Tubes 3-5 mm. long, 2 to a mm. 



Pileus wholly or partly darker than fulvous, usually bay- 

 brown or blackish. 



Context isabelline to ochraceous-ferruginous. 

 Surface finely tomentose to scabrous. 

 Surface densely clothed with long fibers. 

 Fibers persistent; cystidia absent. 

 Fibers wearing away with age; cystidia con- 

 spicuous. 

 Context fulvous. 



Pileus less than 2 cm. broad. 

 Pileus 4-6 cm. broad. 

 Context umbrinous-chestnut. 



Pileus effused, narrowly reflexed. 



Tubes large, 2 to a mm., cinereous. 

 Tubes small, 78 to a mm., purplish-umbrinous. 

 Pileus not effused, or, if so, broadly reflexed. 



Surface entirely pure-black, or slightly fuliginous 



in narrow zones; hymenium grayish-white. 

 Surface fulvous-umbrinous with bay-black zones, 



or uniformly dark-bay. 

 Pileus flexible, tomentose to aculeate. 

 Pileus rigid, tomentose to glabrous; tubes often 

 stratified. 



I. 



1. C. crocata. 



2. C. occidentalis. 



3. C. rigida. 



4. C.fulvocinerea. 



5. C. crocaliformis. 



6. C. Taylori. 



7. C. cirrifer. 



8. C. sarcitiformis. 



9. C. fumosa. 



10. C. caper atiformis. 



it. C. vittata. 

 12. C. vibratilis. 



13. C. nigrocinerea. 



14. C. caper ata. 



15. C. subglabrescens. 



CORIOLOPSIS CROCATA (Fries) Murrill 



Pileus coriaceous, membranous, flaccid, flexible, elastic, effused- 

 reflexed, sometimes covering the entire under surface of logs, the 

 reflexed portion dimidiate to reniform, applanate, conchate, 0-5 

 cm. long, 4 to many cm. broad, not exceeding 2 or 3 mm. in thick- 

 ness; surface densely concentrically striate, somewhat zonate, 



