1917] 



BURT THELEPHORACEAE OF NORTH AMERICA. VIII 239 



The collections which have been available seem to indicate 

 that Coniophora is more abundant in temperate than in trop- 

 ical regions. 



Our few species which have cystidia are not segregated 

 as Coniophorella, because such segregation would place two 

 common species, C. sujfocata and C. olivascens, in the posi- 

 tion of troublesome intermediates with some of their speci- 

 mens seeming to belong in Coniophora in the restricted sense 

 and others in Coniophorella. The per cent of connecting 

 species is obviously too large for cleavage into natural genera. 



Key to the Species 



Neither incrusted nor hair-like cystidia present in the hymenium, with 

 the exception of C. suffocata which sometimes has short cystidia barely 

 distinguishable from the basidia, and of G. olivascens, some sections of 

 which may lack cystidia 1 



Cystidia present 8 



1, Fructification fleshy when growing, often 1 mm. thick, separable from 

 substratum; hyphae densely interwoven, 4-7 fi in diameter, not in- 

 crusted i.e. cerebella 



1. Fructification drying tawny olive to snuff-brown, 200-250 fi thick, not 

 fleshy, separable from the substratum; spores fusiform, tapering at 

 both ends, 18-21 X 5-6 fi 2. C. fusispora 



1. Fructification not fleshy, dry; spores less than 15 m long 2 



2. Spores 8X3-4 y.; fructification described originally as sulphur- 

 cinereous and papillate 7. C. sistotremoides 



2. Hymenium not papillate 3 



3. Fructification not stratose; spores between 10 and 13 fi long 4 



3. Fructification not stratose; spores less than 10 m long 6 



3. Fructification stratose, snuff-brown throughout, velvety, ^1 mm. thick 



11. C. dryin<i 



4. Fructification neither stratose nor with incrusted hyphae 5 



4, Fructification not stratose but with incrusted hyphae, avellaneous to 



tawny olive and Saecardo's umber 12. C. suffocata 



5. Fructification adnate, 100-500 /x thick, drying from warm buff to tawny 

 olive or darker, with paler margin; hyphae loosely interwoven, 2-3 n 

 in diameter, without inflations 3. C arida 



5. Closely resembling C. arida but with hyphal portions occasionally swollen 



to 4-7 n in diameter 4-0. Kalmiae 



6. Spores ellipsoidal, 7-8X3-4 fi; hyphae with inflations 9-12 fi in 



diameter, and with pyriform, vesicular hyphal ends 5. C. inflata 



6. Spores broadly ovoid 7 



6. Spores subglobose, 4-5X4 fi; fructification pinkish tan; hyphae not 

 incrusted, not nodose-septate. (C. olivascens has nodose-septate 

 hyphae ) 10. C. Harperi 



7. Fructification membranaceous, separable, pinkish buff, the margin white, 



cottony, and usually with prominent radiating mycelial strands 



6. C. polyporoidea 



7. Fructification spongy, hypochnoid, between pinkish buff and ciimamon- 



buff throughout and at the margin; hyphae 6-7 fi in diameter. . . .8. C. vaga 



