37 ^ 
Hymenium white or yellowish 
Margin of pileus entire or lobed, not lacerate 
Plleus less than 1 nan flexible 
C .haedinus 
Pileus thicker 
White throughout even in dried material 
C. subs tipi tatus 
White or yellowish rarely tinged bay behind 
tubes yellowish or tawny 
Context fibrous, 1 mm, tubes 7-8 per mm 
C. hondurensis 
Context fleshy tough 1-3 mm; tubes 4-5 per 
mm pileus brittle when dry 
C, ochrotinctellu s 
Isabelline fulvous, hymenium fulvous; sur- 
smooth C. leiodermus 
Margin lacerate tubes 4-6 per mm 
C . membranaceus 
Surface of joileus clothed entirely with a conspicuous 
hairy covering 
Hymenium wholly or partly fuscous; tubes broad and 
shallow 
Latericious fulvous excejjt near margin 
C .fulvoumbrinus 
White to cinereous or isabelline, tubes regular 
C. pinsitus 
Hymenium not fuscous white or slightly discolored 
More or less purple, marked with a few concentric 
lines C. scutatus 
White to cinereous with numerous concentric lines 
. C . pavonius 
Tubes soon breaking up intokrpiciform teeth 
Pileus 10-20 cm, surface xibrillose tomentoese 
C .maximus 
Pileus smaller, 1 cm or less, very thin 
Pileus flabelliform, glabrous C, sobrius 
Pileus subcami>anulate , pendulous, erumpent, finey 
tomentose C. cyphelloides 
Hymenophore stipitate, tough, stipe simple, epixylous 
Tubes large, hexagonal, radially elongate 
Pileus white or n arly so 
Not distinctly tomentose, flabelliform, 
Stipe 5-10 mm in diam 
Tubes 1 mmiin length 
Tubes 3-6 mm in length 
Stipe 1-3 mm diam 
Pileus 3 cm or less in diam 
Favolus 
stipe usually distinct 
F.princeps 
F. pseudoprincejjs 
Tubes flesh colored 2 mm wide 
Tubes pallid, 1 mm wide 
Pileus 4 cm or more in diam 
Margin entire, often pellucid 
Margin ciliate or denticulate 
Surface minutely tessellate 
Surface not tessellate 
F, Maxoni 
F. floridana 
F, daedal ea 
F, tessulatula 
F. fragilis 
