166 



3- Pileus encrusted, surface darker than the context. 4 



Pileus rarely encrusted, surface concolorous with the context. 8 



4. Pileus thick, sulcate, ungulate, rarely applanate. 5 

 Pileus thin, distinctly zonate, irregular or applanate, crust brown to black ; spores 



hyaline, 6X4/^- f^- annosus (Fr. ) Cooke 



5. Surface soon becoming rimose, deeply sulcate, older pores visible in the upper 



projecting annual layers ; pileus exactly ungulate. F. Ellisiamis Anders. 



Surface not soon rimose, older pores not visible. 6 



6. Pores 2-3 to a mm. ; pileus subtriangular, gray to black, context white to pale 



cinnamon ; spores 7-8 fi X ^-7 ^ > abundant on Fraxinus. 



F. fraxinophilus (Peck) Sacc. 

 Pores 4-5 to a mm. ; pileus ungulate, applanate when very large, deeply annually 

 sulcate, surface often resinous, bay or black in color ; abundant on conifers. 



F. ungulatus (Schaefif. ) Sacc. 



7. Pileus ungulate, becoming black only at the base, zonate and concentrically sulcate 



in age, tubes over 0.2 cm. long. F. Ohiensis (Berk.) Murrill 



Pileus scutellate, uniformly black even when quite young, tubes less than 0.2 cm. 



long, context thinner than tube layer. F. sciitellatus ( Schw. ) Cooke 



8. Pileus cylindrical, tubes long, visible at edges of older strata, context friable, be- 



coming bitter ; growing on conifers. /". Laricis (Jacq.) Murrill 



9. Tubes less than 2 mm. long each year, context punky, hymenium glistening, no*^ 



becoming dark in color. F. populinus (Schum. ) Cooke 



Tubes more than 2 mm. long each year, context hard and rather friable, hyme- 

 nium becoming smoky or brownish, cracking in age. 



F. Mehae ( Underw. ) Murrill 



D. Key to the Species of Glop.ikomes. 

 I. Plant sweet-scented, growing on trunks of oak and beech. 



G. graveolein (Schw. ) Murrill 



E. Key to the Species of Elkvingia. 



1. Context ferruginous, spores hyaline, pileus usually ungulate. 2 

 Context fulvous to chocolate-brown, spores yellowish brown, pileus usually ap- 

 planate. 3 



2. Pileus exactly ungulate, pores 3 to a mm., growing in temjierate regions south to 



Carolina. E. fomcntaria (L. ) Murrill 



Pileus compressed-ungulate, pores 5 to a mm., growing in the Gulf States. 



E. fasciata ( Sw. ) Murrill 



3. Hymenophore annual, persisting above later growths, spores roughly echinulate 



S-g/i X 7/'- £^- reniformis (Morg. ) Murrill 



Hymenophore truly jjerennial, tulies .stratified, spores smooth, 8-9 /i^^fi. 



E. megalovia {\Av.) MunilJ 



F. Key to the Species of Pyropoi.yi'orus. 

 I. Pileus thick, ungulate, woody, margin obtuse. 2 



Pileus thin, conchate or applanate, margin acute. 9 



