3 v> 
fragile when dry. P. ( Tomophagus) colossus 
Pileus firm, flexible or rigid; p r . 
Context duplex, spongy above Spongipellis 
Pileus more than 1 cm. thick; tubes 
large, 1-2 per mm,; dark not resi- 
nous . 
Pileus less than 1 cm. small 
Pileus 5 cm. pr less broad 
Pileus 4-7 cm. broad; surface 
very hairy. 
Context not dux^lex 
Pileus fleshy, tough to woody & 
rigid 
Surface anoderm, rarely zonate 
Hymenium smafcpke- colored, 
when young, becoming black . 
Tubes white Jmouths black Palbostygia 
Hymenium pallid, becoming 
S.luridescens » 
S.hydrophilus 
S. substuppeus , 
blackish. 
P . Cuba 
Pileus 5 cm. more or less P.terebrans 
Pileus 10-20 cm. P.subsimulans . 
Hymenium white or pall lid 
Context fleshy- tough, 
friable when dry. Tyromyces. 
Pileus 8 cm. or more 
diam. 
Tubes less than 5 cm.; 
pileus 3-5 mm. thick 
Tubes firm, entire T.paimarum. 
Tubes more than 5 cm. 1 
long; surface smooth; 
pileus white; spores 
ellipsoidal T.nivosellus. 
Pileus uhder 5 cm. 
Pileus resinous or 
cartilaginous3-4 cm. 
thick; tubes 6 per mm.T, versicutus. 
Pileus not resinous, etc. 
Pileus milk-white, 
un changing , ve ry 
soft & friable T.ieucomallus 
Pileus s omwwha t 
brownish, not very 
friable. 
Tubes 3-4 mm. long, 
longer than thick- 
ness of thin con- 
text. T.albogilvus. 
Tubes short- thick- 
ness of context. 

