84 TROPICAL POLYPORES 



4. FULVIFOMES LINTEUS (Berk. & Curt.) Murrill, comb. nov. 



Pileus hard, heavy, dimidiate to nearly circular, applanate, 

 7-10 X 8-15 X 3-5 cm.; surface villose-tomentose, castaneous 

 with a fulvous tint, densely sulcate, becoming darker and slightly 

 rimose with age; margin obtuse, melleous to fulvous, tomentose; 

 context corky to woody, melleous-ferruginous with silky luster, 

 slightly zonate, bounded above by a dark, horny layer, 3-6 mm. 

 thick; hymenium umbrinous with a grayish tint; tubes indis- 

 tinctly stratified, 3-5 mm. long each season, fulvous-chestnut 

 within, mouths circular, minute, 6 to a mm., edges rather thin, 

 entire, ferruginous to fulvous; spores subglobose, smooth, fer- 

 ruginous, 3-4 M; cystidia cuspidate, dark-fulvous, 60-120 X 10- 

 20 n. 



Occasional on dead trunks of trees in Mexico and Nicaragua. 

 An interesting feature of this species is the appearance under a 

 pocket lens of numerous large, brown, pointed cystidia on the 

 broken surfaces of the young context. 



5. FULVIFOMES SUBPECTINATUS Murrill, comb. nov. 



Pileus thin, conchate, dimidiate to flabelliform, imbricate, 

 laterally connate, often decurrent and effused behind, 2-4 X 

 4-8 X 0.3-0.5 cm.; surface conspicuously tomentose, repeatedly 

 slightly sulcate, longitudinally furrowed at times, chestnut- 

 brown, with a thin black crust beneath a heavy coating of 

 tomentum; margin subacute, sterile, tomentose, ferruginous, 

 undulate to lobed; context very thin, ferruginous to fulvous, 

 1-2 mm. thick; tubes indistinctly stratified, 1-2 mm. long each 

 season, fulvous within, mouths circular, extremely minute, 

 9-10 to a mm., edges thin, entire, glistening, dark-melleous to 

 ferruginous; spores globose, smooth, light-brown, 2 fj,; cystidia 

 none. 



Occasional on dead wood in Cuba, Jamaica, and Mexico. 



6. FULVIFOMES CALCITRATUS (Berk. & Curt.) Murrill, comb. nov. 



Pileus dimidiate, applanate to compressed-ungulate, 4-10 X 

 6-12 X 1-3 cm.; surface tomentose, zonate, sulcate, umbrinous, 

 becoming glabrous, darker and horny-encrusted with age; margin 

 acute to subobtuse, sterile, ferruginous to fulvous; context 

 woody, melleous to subferruginous with silky luster, 3-10 mm. 

 thick; tubes distinctly stratified, often separated by thin layers 

 of context, 4-6 mm. long each season, avellaneous within, mouths 

 subcircular, minute, 7 to a mm., edges rather thin, melleous when 



