22 THE CHICAGO ACADEMY OF SCIENCES 



Tubes replaced wholly or in part by con- 

 centric lamellae; these becoming lacerate 

 or polyporoid Cyclomyces. 



Tubes reduced to shallow, alveolar, more or 

 less radially arranged shallow pores; pileus 

 fleshy-tough, subsessile or short-stemmed . . Favolus. 



Tubes in the form of shallow pores formed by 

 reticulating folds of the hymenium; re- 

 supinate, effused, waxy or gelatinous Merulius. 



Tubules distinct, at first as papillae arising 

 from a mycelial mat, then elongate and 

 tubular Porothelium. 



Tubes cylindric, distinct from each other, 



membranaceous, crowded, closed at first . . Solenia. 

 FAM. III. HYDNACEAE. 



Fleshy or corky, pileate or resupinate; teeth 

 distinct, awl-shaped or needle-shaped, 

 acute Hydnum. 



Leathery or woody; teeth concrete with the 

 pileus, regularly arranged but not uniform 

 in shape Irpex. 



Resupinate; with irregular, subcylindrical, 



obtuse tubercles Radulum. 



Resupinate; fleshy, hymenium corrugated in 



crests, folds or ridges Phlebia. 



Resupinate; subiculum of woven fibers bear- 

 ing crested warts or granules Odontia. 



FAM. IV. THELEPHORACEAE. 



Pileus fleshy or membranaceous, often in- 

 f undibulif orm ; hymenium ribbed, or some- 

 times rugulose Craterellus. 



Plants leathery, pileate or resupinate; hy- 

 menium even or slightly ribbed, not cracked 

 in drying Thelephora. 



Plants leathery or woody, pileate, effused- 

 reflexed or resupinate; hymenium even, 

 smooth, underlaid by an intermediate fib- 

 rous stratum Stereum. 



Like Stereum, but hymenium velvety from 



smooth, colored bristles Hymenochaete 



Pileus resupinate, or with the margin reflexed; 

 hymenium waxy, with no intermediate 

 layer, often cracked when dry Corticium. 



Plants resupinate, leathery or somewhat 

 fleshy; hymenium velvety with exserted, 

 hyaline, cellular processes Peniophora. 



Plants resupinate, membranaceous; hymen- 

 ium fleshy, pulverulent with colored spores. Coniophora. 



Plants floccose-collapsing or like a mould and 



resupinate; basidia on long lax hyphae .... Hypochnus. 



