94 TROPICAL POLYPORES 



6. AMAURODERMA AVELLANEUM Murrill 



Pileus rather thick, flabelliform, laterally attached, 6 X 6 X I 

 cm.; surface pulverulent to glabrous, very rugose, colliculose 

 behind, slightly sulcate, thinly encrusted, opaque, avellaneous 

 with faint reddish-brown zones; margin pallid, acute, lobed, 

 pulverulent; context corky with horny radiations, pale-isabelline 

 when dry, 3-4 mm. thick; hymenium free; tubes long and 

 slender, not stratified, I cm. long behind, shorter in front, white 

 within, mouths circular, 4 to a mm., edges obtuse, entire, white; 

 stipe long, ascending, subcylindric with several short aborted 

 branches, straight, laterally attached, umbrinous, opaque, 

 horny-encrusted, firm and nearly white within, 15 cm. long, I cm. 

 thick. 



Found once on decayed wood in Nicaragua. 



7. AMAURODERMA CHAPERI (Pat.) Murrill 



Pileus corky to woody, regularly orbicular, plane, slightly 

 depressed at the center, 8 X 8 X 1.5 cm.; surface opaque, 

 brownish-black, fulvous-fasciate, abundantly shallowly concen- 

 trically sulcate, with fragile crust; margin plica te-rugulose, 

 obtuse, fertile, pallid ; context punky, pale-fulvous, homogeneous, 

 4-5 mm. thick; hymenium free; tubes not stratified, avellaneous- 

 isabelline, 8-12 mm. long, mouths circular or angular, regular, 

 minute, 4-5 to a mm., edges thick, entire, avellaneous; spores 

 exactly spheric, fulvous, echinulate; stipe central, cylindric, equal, 

 very long, probably rooting, opaque, brownish-cinereous, pale- 

 fulvous and stuffed within, 15 cm. long, 8 mm. thick. 



Found once on dead wood in Cuba and once in Porto Rico. 



8. AMAURODERMA FLAVIPORUM Murrill 



Pileus hard, rigid, circular, depressed at the center, concave 

 below, 8-12 X 8-12 X I cm.; surface opaque, velvety, um- 

 brinous with numerous bay-black zones, radiate-rugose, not 

 sulcate; margin paler, velvety, subzonate, deflexed, at least when 

 dry, acute, undulate to lobed; context white, corky, homogene- 

 ous, 5 mm. thick; hymenium adnate; tubes very pale avellaneous, 

 not stratified, 2-4 mm. long, mouths angular, 4-5 to a mm., 

 stuffed when young, edges thin, entire, flavous when fresh, 

 cremeous-melleous in dried specimens; spores ovoid, truncate, 

 yellowish-brown, roughly echinulate, 6-7 X 4-5 MJ stipe thick, 

 central, slightly flattened, equal or expanding above, erect, 

 opaque, horny-encrusted, velvety, dark-melleous-luteous, white 

 and punky within, 6-8 cm. long, 1.5-2 cm. thick. 



