TROPICAL POLYPORES 



Margin of pileus strigose, fertile below. 10. P. arcularius. 



Tubes not alveolar. 



Tubes very irregular; stipe usually thick and 

 polished; pileus tough, umbilicate, yellowish- 

 white with brown marginal band; cilia short, 

 fugacious. ii. P. variiporus* 



Tubes fairly regular; stipe slender, not polished; 

 plants rather delicate; cilia variable in form 

 and persistence. 



Pileus opaque, not translucent, 1-4 cm. in 

 diameter; cilia long, of uncertain duration; 

 plants mostly cespitose. 12. P. Tricholoma. 



Pileus very thin, more or less translucent, 1-2 

 cm. in diameter; cilia short, slender, fuga- 

 cious; plants not cespitose. 13. P. Cowellii. 

 Stipe wholly or partly black or fuliginous, variously at- 

 tached, usually darker than the pileus. 

 Pileus finely tomentose, drab-colored, with reddish- 

 brown spots, small, circular; tubes rounded, minute. 14. P. maculosus. 

 Pileus not as above. 



Tubes reaching 0.5-1 mm. or more in diameter. 



Stipe short, less than i cm. long; pileus normal. 15. P. Wrightii. 

 Stipe usually very long, 1-15 cm.; pileus some- 

 times aborted, resembling a Xylaria. 16. P. marasmioides* 

 Tubes much smaller, 4-10 to a mm. 



Surface light-colored, isabelline to pale-umbrinous. 

 Stipe central, or excentric; species confined to 



temperate regions. 17. P. elegans. 



Stipe lateral; species confined to tropical 



regions. 18. P. subelegans. 



Surface dark-colored, bright-bay to almost black. 

 Stipe central; pileus proliferous at times, 

 surface glabrous; species confined to tropic- 

 al and South America. 19. P. diabolicus. 

 Stipe horizontal, usually lateral or excentric, 



rarely central in temperate species. 



Stipe 2-6 cm. long; pileus glabrous, pale-fuliginous. 20. P. Marbleae. 



Stipe 0.3-1 cm. long; pileus bay or chestnut to blackish. 



Surface glabrous. 21. P. Blanchetianus. 



Surface marked with rows of serrated black squamules. 2^ P. scdbellus. 

 Stipe obsolete; pileus latericeous, spotted. 23. P. praeguttulatus* 



I. POLYPORUS HYDNICEPS Berk. & Curt. 



Pileus cup-shaped or irregularly broken up into flabelliform 

 lobes, 3-4 X 0.1-0.2 cm.; surface light-brown to bay, adorned 

 with very prominent cylindric or subpyramidal processes; 

 margin thin, irregular, undulate or lobed, inflexed; context pallid, 

 fleshy, rigid and fragile when dry, about I mm. thick; tubes 



