KEY TO THE GENERA OF FAMILY FISTULINACEAE 515 



Resupinate or reflexed, spines borne on tough branching processes which 

 are partially submerged in a brownish tomentum. 



Gloiodon 

 Resupinate, reflexed or stipitate; teeth or spines not borne on such proc- 

 esses. 

 Resupinate, thin, floccose, crustaceous, ceraceous, or subcoriaceous. 

 Ceraceous; teeth thick, occasionally slender, obtuse, deformed or ir- 

 regularly scattered. Radulum 

 Texture otherwise; teeth varying from short fragile warts to long 

 conspicuous teeth or spines. 

 Stellate setae present. Asterodon 

 Cystidia present. Odontia 

 Cystidia or setae absent. 



Warts short, hemispheric, cylindrical, or subulate and fragile. 



Grandinia 

 Teeth or spines conspicuous, long, slender, usually terete. 



Oxyodontia 

 Reflexed to stipitate, rarely resupinate; fleshy to coriaceous. 

 Fleshy, growing on the ground. 



With central stipes; spores smooth. Dentinum 



Pileus irregular, with deformed stipe, spores minutely echinulate. 



Hydnodon 

 Fleshy or coriaceous; growing on a woody substratum. 



Richly branched or pulvinate; soft; fleshy. Heridum 



Cap coriaceous with long, laterally attached stipe, spores slightly 

 roughened. Auriscalpium 



Reflexed to obscurely laterally stipitate, occasionally resupinate; 

 subfleshy to coriaceous; spores smooth. Steccherinum 



Key to the Genera of Family Meruliaceae^ 



(Based in Part on Bourdot and Galzin, 1927) 

 Spores hyaline. 



Hymenium with irregular tubercules or radiating (not anastomosing) folds; 

 waxy, then indurated ; mostly resupinate (sometimes placed in the Hydnaceae) . 



Phlehia 

 Hymenium with lamelliform folds, crisped; membranous; sessile centrally or 



laterally. Plicatura (Trogia) 



Hymenium with folds anastomosed into alveoli or pores; sessile or resupinate; 

 more or less gelatinous. Merulius 



Spores rust-colored or ochraceous; resupinate, rarely reflexed. 



Gyrophana (Serpula) 



Key to the Genera of Family Fistixlinaceae* 



Fleshy, mostly forming a laterally attached pileus, sometimes resupinate. Pores 

 remaining separate although in close contact. Fistulina 



Membranous or crusty; resupinate; with scattered warts which elongate to 

 become pores. Porothelium 



3 Some authors (Bourdot and Galzin, 1927; Rea, 1922, etc.) include in this family 

 the following genera with smooth hymenium: Coniophora, Coniophorella, Jaapia. 

 ^ Cyphella and Solenia possibly belong here also, instead of in the Thelephoraceae. 



