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. suffocata 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 inerusted 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. olivasoens, 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 /* in diameter, not in- 

 crusted 1. G. oerebella 



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

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

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



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



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

 cinereous and papillate 7. G sist&tremoidea 



2. Hymenium not papillate 3 



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



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



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



T^. ?T. 11. G. dryina 



4. Fructification neither stratose nor with inerusted hyphae 5 



4. Fructification not stratose but with inerusted hyphae, avellaneous to 



tawny olive and Saccardo's umber . . .~;V'. 7 . .TT . . T 12. G. suffocata 



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

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

 in diameter, without inflations 3. G. aHda 



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



to 4-7 fi in diameter \. G. Kalmiae 



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



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



6. Spores broadly ovoid 7 



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

 inerusted, not nodose-septate. (C olwascens has nodose-septate 



hyphae ) 10. G. Harperi 



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



cottony, and usually with prominent radiating mycelial strands 



6. G. polyporoidea 



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



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



