Pileus applanate dimidiate, light weight, soft woody texture; 
Pyr ovolyporus yu c a t an en s i s 
Pileus ungulate, conic, pendent, vertically attached, 
heavy stony texture P. dependens 
Pileus thin or moderate, conchate to applanate, never truly ungulate 
Context ferruginous to tawny 
Surface soon covered with horny thick, dark glabrous crust 
Tube layers very prominent, tubes stuffed with white mycelium 
P, grenadensis 
Tube layers distinct but not prominent, not conspicuously 
stuffed 
Dissepiments thick, hymenium concplor^with context, surface 
not rimose in age 
Dissepiments thin, hymenium t length darker than context, 
surface rimose T. 
Surface anoderm or slightly encrusted 
Hymenium chestnut brown, gli stening, tubes 3-5 mm long each 
season, pileus large velvety ferruginous to tawny 
P, Robinsoniae 
Hymenium isabelline to tawny 
Pileus turbinate-conic, attached at vertex, spores otoid, 
hyaline 6-7x4-5u, cystidia none 
P. Bacoharidis 
Pileus dimidiate to flabellif orm, normally attached 
Surface tomentose, soft to tough, tubes short, tawny within 
Tubes 5-6 per mtn. corky to woody with a silky lustre 
P, linteus 
Tubes 8-10 per mm., pileus 4-8 cm broad, n-fesmwxtew ft.Brw x 
concave below, surface remaining conspicuously tomen- 
tose P» subpectinatus 
Surface soon encrusted hard; tubes avellaneous within, 4-6 
mm long each season P. calcitratus 
Context yellow (flvvus to luteus) 
Surface conspicuously fibrose lacerate 
P , sar c i tu s 
Surface inconspicuously tomentose or glabrous 
Pileus very large 15-30 cm broad; context marked with interlacing 
lines of lighter color P. extensus 
Pileus 8-12 cm broad; context homogeneous 
Surface almost free from markings; tubes 2-6 mm long each 
season; on mesquite P, sublinteus 
Surface distinctly zonate and shallowly furrowed; tubes 5-10 
mm long each sea, son; on logwood 
P, Haematoxyli 
Surface encrusted; context punky, sessile, simple or imbricate 
Context ferruginous ; spores hyaline; pileus compressed ungulate; pores 
5^er mm. vingia f a sc i at a 
Context Hiawny to bay; spore s^yellowish brown, pjleussusually applanate 
crust brown 
Pileus thick at maturity, crust smooth and very hard; hymenium plan? 
margin truncate, very smooth often laccate 
E, tornata 
Pileus thin, crust radially wrinkled, thinner; hymenium concave ; mar- 
gin undulate, never laccate E. Lionnetii 
