TROPICAL POLYPORES 83 



1. FULVIFOMES GRENADENSIS Murrill, comb. nov. 



Pileus hard, applanate, nearly circular to dimidiate, narrowly 

 attached and considerably thicker behind, 5-12 X 7-15 X 1.5-4 

 cm.; surface rough, rugose, closely furrowed, tomentose, horny- 

 encrusted, fulvous to dark-chestnut-brown or black; margin 

 obtuse, rounded in young plants, tomentose, fulvous, rather thin 

 in large specimens; context hard, fulvous, slightly lustrous, 

 regularly zonate, 5-7 mm. thick; tubes very evenly and very 

 distinctly stratified, the strata separated by very thin layers of 

 context, 1-1.5 mm - l n g eacn season, fulvous, filled with white 

 mycelium, mouths circular, minute, 5 to a mm., edges thick, 

 entire, fulvous to fuliginous; spores globose, smooth, light- 

 yellowish-brown, 3-4 ju; cystidia none. 



Found once on dead wood in Grenada. 



2. FULVIFOMES PSEUDOSENEX Murrill, comb. nov. 



Pileus very hard, dimidiate, applanate, usually concave below, 

 12-20 X 15-30 X 2-3 cm.; surface glabrous, horny-encrusted, 

 subshining, repeatedly slightly sulcate, chestnut-brown to nearly 

 black; margin thin, subobtuse, undulate to lobed, ferruginous; 

 context woody, ferruginous, 3-5 mm. thick; tubes evenly strati- 

 fied, at times separated by layers of context, 2-3 mm. long each 

 season, fulvous within, mouths circular, very minute, 6 to a mm., 

 edges obtuse, entire, becoming dark-fulvous; spores globose, 

 smooth, fulvous, 4-5 /*; cystidia none. 



Occasional on decayed trunks in Mexico and Nicaragua. 



3. FULVIFOMES JAMAICENSIS Murrill, comb. nov. 



A rather fan-shaped plant, the upper layers of which are dead 

 and much cracked and roughened, while the layers added below 

 are smaller each succeeding year; pileus applanate, much 

 thicker behind, 8 X 13 X 0.5-5 cm.; surface uneven, radiately 

 rimose, dark-brown to black; margin ferruginous, velvety, acute, 

 becoming black, spreading and lobed, projecting 1-2 cm. beyond 

 the new layers; context woody, fulvous, 0.5-1 cm. thick; tubes 

 stratified, separated by thin annual layers of context, 0.2-0.7 

 cm. long each season, 7 to a mm., fulvous within, mouths rounded 

 or polygonal, hoary when young, edges thin, acute, entire; spores 

 globose or subglobose, thin-walled, smooth, pale-golden-yellow 

 (probably darker in age), 5-7 n. 



Found once on old stumps of Psidium near Port Antonio, 

 Jamaica. 



