3V 
Stipe less than 5 crnlong 
Pileus 10 cm or more broad; tubes 5 to a mm; lants cespitose 
A. coffeatum 
Pileus 5 cm or less broad; tubes 8 per mm. plants simple 
A. regu.li color 
Stipe 15 cm. long A, avellaneum 
Stipe central, erect 
Hyraenium white to avellnneous; stioe 15 cm Ion 
P' 
A. chapieri 
Hymenium rich yellow; stipe less than 10 cm logn 
A. flaviporum 
Pileus 3 cm or lees broad; stipe slender, less than 5 ram thick 
Context bay A. renatim 
Context white to avellaneous 
Stipe 2 cm long;pileus orbicular, nodding 
A. nutans 
Stipe 10 cm. long; pileus reniform, erect 
A. subrenatum 
Hymenophore sessile 
Context olivaceous Pomitella, 
Tubes 5 per mm, 1-3 mm long each season 
P. supina 
Tubes 1-2 per mm. 3-5 mm long each season 
P, fumosoavellanea, 
Context flesh or wood colored, tubes 3-5 mm each season, spores spheric 
Pomes Sagraeanus 
Context white or nearly so (yellowish) Pomes 
Pileus encrusted, more than 3 cm, surface pure black or nearly so 
at maturity with no trace of red 
Context punky, crust thin, fading in age 
P . subf err eu s 
Context vroody, crust thick, horny a,nd shining 
P. ligneus 
Pileus not encrusted, surface concolor with context 
Pores large, 2 per mm, reddish when bruised, , annual strata 
separated bjr thick layers of context 
P. rubritinctus 
Pores small, 5-7 per mm, not changing, tubes light brown, strongly 
contrasted with yellow or white context, 1 cm or more long 
Surface zonate p, Auberianus 
Surface azonate p, geotropus 
Context brown or latericeous Pyr opolyporus 
Pileus thick, ungulate, context light to dark brown 
Surface brown or black or gray, not becoming rimose 
hymenium ro seocinereous to smoky gray 
P. roseociner eus 
Hymen i to ferruginous to tawny 
Context ferruginous, surf ace dark brown marked with narrow 
concentric lines; tubes thinwalled, 5 per mm 
P. inflexibilis 
Context tawny, surface black without lines and more sulcate, 
» tubes thinwalled, 3 per mm,p, CeTLkinsi 
Surface black or nearly so, soon very rimose, all brown spores 
Pileus 12 cm or more m -gin rounded P. Cedrelae 
Pileus smaller, margins angular 
Tubes large 3-4 per rmn, thin lied, spores 7x9u, cystidia none 
, P, Under wo odii 
Tubes 5-7 periin, thickwalled 
