TROPICAL POLYPORES 67 



32. INONOTUS P. Karst. 



Hymenophore annual, epixylous, sessile, dimidiate, simple or 

 somewhat imbricate, variable in size; surface usually anoderm, 

 brown, hairy or glabrous; context brown, thin and fibrous to 

 spongy or corky; hymenium concolorous, usually covered with 

 whitish powder in youth, tubes small, thin- walled; spores 

 smooth, light- to dark-brown. 



Surface conspicuously hairy. 



Pileus very thin, 12 mm. i. 7. pertenuis. 



Pileus quite thick, 7-20 mm. 2. 7. fulvomelleus. 



Surface not conspicuously hairy. 

 Spores deep-brown in color. 



Pileus 3 cm. or less broad; spores ferruginous. 3. I. jamaicensis. 



Pileus 5-12 cm. broad; spores fulvous. 



Tubes minute, 2 mm. long. 4. 7. porrectus. 



Tubes large, 1.5-2 cm. long. 5. 7. leprosus. 



Spores faintly tinged with brown. 



Tubes invisible to the unaided eye. 



Pileus thick, azonate, margin obtuse; hymenium 



dull. 6. 7. corrosus. 



Pileus thin, zonate, margin very sharp; hymenium 



glistening. 7. 7. Wilsonii. 



Tubes visible to the unaided eye, although sometimes 



small. 

 Surface soft and spongy; hymenophores found on 



living shrubs, often encircling the twigs. 8. 7. fruticum. 



Surface not soft and spongy; hymenophores found 



on decaying trunks or branches. 



Pileus very minute, 2 mm. broad. 9. 7. pusillus. 



Pileus of medium size, 6-9 cm. broad. 10. 7. radiatus. 



I. INONOTUS PERTENUIS Murrill 



Pileus very thin, slightly flexible, fragile, sessile, densely 

 imbricate, decurrent, laterally connate, conchate, 2-3 X 4-6 X 

 0.1-0.2 cm.; surface striate, hispid-squamulose, anoderm, spuri- 

 ously zoned, fulvous; margin very thin, lobed, fimbriate, 

 sharply decurved in dried specimens; context fulvous, corky, I 

 mm. or less thick; tubes ferruginous to fulvous, 1-1.5 rnm. long, 

 mouths circular to angular, minute, 5-6 to a mm., edges thin, 

 entire to lacerate, fragile, ferruginous to dark-fulvous; spores 

 ovoid, smooth, pale-ferruginous, 5X4/1. 



Found once on dead wood on El Yunque in Cuba and once in 

 the mountains of Panama. 



