TROPICAL POLYPORES 85 



young, becoming avellaneous; spores globose, smooth, brown, 

 7/x; cystidia conic, ventricose, brown, scanty, 15-20 X 5-6/1- 

 Occasional on dead wood in Jamaica, Cuba, and Porto Rico. 



7. FULVIFOMES MELLEICINCTUS Murrill, comb. nov. 



Pileus woody, dimidiate, sessile, convex above, plane below, 

 3 X 5-6 X 1.5 cm.; surface subglabrous to glabrous, subzonate, 

 black or dark-bay behind, melleous on the margin, nearly smooth, 

 slightly rimose on drying or with age, margin entire, fertile, acute 

 or slightly obtuse; context light-fulvous, shining, faintly zonate, 

 woody, about I cm. thick; tubes slender, fulvous within, 3-5 mm. 

 long, not distinctly stratified, mouths small, subcircular, 3-4 to a 

 mm., edges rather thick, obtuse, isabelline-umbrinous, glistening; 

 spores globose to subglobose, smooth, fulvous, 4-6/1; cystidia 

 none. 



Collected once on dead wood near Tehuantepec, Mexico. 



8. FULVIFOMES YUCATANENSIS Murrill, comb. nov. 



Pileus dimidiate, applanate, thickest behind, 7-9 X 9-12 X 

 2-3 cm. ; surface clothed at first with tawny tomentum, becoming 

 very dark brown or black and uniformly tubercular and broken 

 into small areas by numerous, shallow, concentric furrows and 

 radial cracks; margin narrow, acute, velvety, fulvous; context 

 hard, fulvous, 0.5 cm. thick; tubes rather indistinctly stratified, 

 0.25 cm. long each season, 7 to a mm., fulvous, mouths circular, 

 punctate, edges thick, obtuse; spores globose or subglobose, 

 smooth, pale-yellowish-brown, 3.5-5 /*; cystidia thick at the 

 base, pointed, 17-35 /* 



Occasional throughout most of the region on dead trunks and 

 stumps. 



9. FULVIFOMES SARCITUS (Fries) Murrill, comb. nov. 



Pileus hard, thin, applanate, imbricate, narrowly attached, 

 8 X 14 X 0.7 cm.; surface slightly sulcate, umbrinous to fuligi- 

 nous, fibrose-lacerate, subsquamose, becoming almost smooth, 

 with black horny crust; margin subacute, umbrinous, hispid, 

 undulate to lobed; context hard, ferruginous, 1-2 mm. thick, 

 becoming fulvous and streaked with white in age; tubes indis- 

 tinctly stratified, 1-2 mm. long each season, ferruginous within, 

 walls circular, 5-6 to a mm., edges obtuse, entire, melleous to 

 pale-fulvous; spores globose, smooth, very light brown, 5ju; 

 cystidia none. 



Collected once on the island of St. John, West Indies, growing 

 on dead wood. 



