226 MuRRiLL : Polyporaceae of North America 



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

 Pileus at first thin, triangular or lobed, shining reddish-chestnut above, becoming 



dimidiate, ungulate at the center, and dull brown: spores ovoid, 3.5 X 5 i"- 



Pileus attached by a lateral stipe which soon disappears. 7. F. stipitatiis. 



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



ovoid, hyaline, 6 X 4("- 2. F. amiosus. 



5. Surface not soon rimose, older pores not visible. 6. 

 Surface soon becoming rimose, deeply sulcate, older pores visible in the upper pro- 

 jecting annual layers: pileus exactly ungulate, found only on Shepheniia. 



4. F. Ellisianus. 



6. Pores 4-5 to a mm. 7- 

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



cinnamon: spores ellipsoidal, 7-8X6- 7/^ ; abundant on Fraxinus. 



5. F. fraxinophilus. 



7. Pileus applanate, many times sulcate, horny encrusted, extremely hard in sub- 



stance ; tropical. 6. F. lignens. 



Pileus ungulate, applanate when very large, deeply annually sulcate, surface often 



resinous, bay or black in color ; abundant on coniferous trees in temperate regions. 



3. F. nngidatus. 



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



in age, tubes over 0.2 cm. long. 8. F. Ohiensis. 



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



long, context thinner than tube-layer. 9. F. scutellatus. 



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



coming bitter ; growing on conifers. 10. F. Laricis. 



Not as above. lO- 



10. Pores large, 2 to a mm., becoming reddish when bruised, annual strata separated 



by thick layers of context ; tropical. 13. F. riibritinctus. 



Pores small, 5-7 to a mm., not changing to reddish when bruised. II. 



11. Tubes less than 2 mm. long eixch season, context punky, hymenium glistening, 



not becoming dark in color. II. F. populimis. 



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

 nium becoming smoky or brownish, cracking in age. 12. F. Mehae. 



I. Fomes roseus (Alb. & Schw.) Cooke 



Boletus roseus Alb. & Schw. Consp. Fung. 251. 1805. 



Poly poms roseus Fr. Syst. i : 372. 1821. 



Polyporus carneus Nees, Nov. Act. Nat. Curios. 13 : //. j. 

 1827. 



Fomitopsis rosea Karst. Rev. Myc. 3: 18. 1881. 



Fojues 7'oseus Cooke, Grevillea, 14: 19. 1885. 



Fojues carneus Cooke, Grevillea, 14: 21. 1885. 



This fungus is very widely distributed and does serious injury 

 to various coniferous trees both in Europe and America. Its 

 form varies greatly with the character of the host plant. Besides 

 the names mentioned above, P. rufo-pallidus Trog (Flora, 15 : 556. 



