8 TROPICAL POLYPORES 



thin and dentate, white, glistening, at length opaque-isabelline 

 or slightly umbrinous; spores allantoid, 4-6 X 1-2 /*. 



Occasional to frequent on dead wood in the mountains of 

 Mexico and the West Indies. 



2. CORIOLUS SUBPAVONIUS Murrill 



Pileus rather thin, coriaceous, slightly flexible when young, 

 becoming rigid, especially on reviving the second season, dimidi- 

 ate or flabelliform, subimbricate, applanate or slightly conchate, 

 2-3 X 2-3 X 0.1-0.3 cm.; surface broadly zonate, finely tomen- 

 tose to subglabrous in zones, pallid or cremeous, becoming bay or 

 olive with age in zones or behind, margin thin, undulate or lobed, 

 pallid; context white, fibrous, firm, I mm. thick; tubes puncti- 

 form, very short at first, later becoming I mm. or more long, 

 white to stramineous within and without, mouths glistening, 

 very regular, circular, minute, 8-10 to a mm., edges rather thick, 

 firm, entire. 



Collected once on dead wood in a moist virgin forest near 

 Jalapa, Mexico. 



3. CORIOLUS SECTOR (Ehrenb.) Pat. 



Pileus rather thin, flexible, flabelliform, often spuriously 

 short-stipitate, imbricate, laterally connate, 2-4 X 3-6 X o.i- 

 0.2 cm. ; surface multizonate, finely radiate-striate, often plicate, 

 silky, usually shining, more or less tomentose near the base, 

 avellaneous to isabelline; margin entire to fimbriate or deeply 

 dissected, sometimes palmate; context thin, coriaceous, avel- 

 laneous, about 0.5 mm. thick; tubes 0.5-1 mm. long, avellaneous 

 within, mouths angular, irregular, very variable in size, 2-6 

 to a mm., edges thin, dentate to lanceolate, avellaneous to fulig- 

 inous; spores globose, 3.5-5 ju. 



Common on dead wood throughout, and easily known by its 

 avellaneous to fuliginous surface and tubes. 



4. CORIOLUS DEPAUPERATUS (Pat.) Murrill 



Pileus widely effused, narrowly reflexed, very thin, soft, 

 spongy, flexible, the reflexed portion 0-5 mm. broad, I mm. or 

 less thick; surface white, spongy- tomentose, azonate; margin 

 very thin, concolorous, broadly sterile at times; context white, 

 membranous; tubes punctiform, very short, white within, 

 mouths circular to slightly angular, 5 to a mm., edges thin, 

 entire to dentate, white, becoming very pale yellowish on drying. 



