POLYPORACEAE Context white. Hymenophore sessile Tubes mostly shallow,early irpiciform; margin cirr hose; Pileus glabrous;2 mm. thick. Tubes hexagonal,alveolar; context, thin,dry, sessile. Pileus less than 1 cm. thick,zonate. Surface with white and light-brown zones. H. tenuis incl. H.polygramma., H.cingulata,similis,unicolor,favol- oides. Surface with dark-brown and purple zones H.variegatus,incl H.papyraca. H.leprosus. Pileus 2-3cm.;surface azonate Tubes hexagonal, elongate radially;context thin Pileus white or nearly so Surface not tomentose;pileus flabelli- form;stipe distinct,sometimes as long as the pileus Stipe 5-10 mm diameter Tubes 1 mm. long Tubes 3-6 mm. long Stipe 1-3 mm diameter Pileus 3 cm. or less;tubes flesh color; 2 mm.wide Pileus 4 cm. or more Margin entire,often pellucid. Margin ciliate or denticulate Surface minutely checkered Surface not minutely checkered F.fragilms. Surface tomentose Context thin,translucent Context thick,opaque Surface tessellate;stipe dis- tinct Surface not tessellate;stipe mere tubercle. Pileus purple;stipe lateral or excentric; Pileus subcircular;stipe excentric;F.subpurpurascens. tubes 2.5 mm. long. Pileus brown;stipe central. Margin entire Margin ciliate Tubes regularly hexagonal Pileus purple Pileus yellow or brown Tubes meruloid Tubes normal length Tubes normally poroid Pileus very soft,spongy, and elastic throughout Hymenophore small;tubes large,not fragile Hymenophore immense;tubes small, Favolius F.princeps. F.pseudoprinceps. F. Maxoni F.daedalea. F.tessellatula F.fragilms. F.reniformis 722- R8. F.subcaperata. F.caperata. F.portbricensis. F.hondurensis. F.induratus. F.brunneolus F.cucullata. Polyporus sensu- latiore. Spongiporus alto- cedroneum.