NORTHERN POLYPORES 7 



Very common on dead deciduous wood throughout the north- 

 ern part of the region southward to New York and Ohio. 



3. CORIOLUS SUBLUTEUS (Ellis & Ev.) Murrill 



Pileus broadly effused, narrowly reflexed, thick, white, sub- 

 imbricate, the reflexed portion 0-2 X 2-4 X 0.5-1 cm.; surface 

 smooth, tomentose, indistinctly zonate; margin obtuse, undu- 

 late; context soft and spongy, white, 3-5 mm. thick; hymenium 

 uneven, subcolliculose ; tubes circular to angular or slightly 

 sinuous, 5-10 mm. long, white within, mouths large, 2-3 to a 

 mm., edges thin, white to yellowish, entire to slightly toothed; 

 spores oblong, slightly pointed, 4-6 X 1.5-2 ju. 



Found once on dead beech trunks in eastern Canada. 



4. CORIOLUS PLANELLUS Murrill 



Pileus very thin, leathery, somewhat fragile, circular to 

 spatulate or flabelliform, narrowly attached, decurrent at times, 

 i~3 X 1.5-2.5 X 0.05 cm.; surface finely tomentose when 

 young, becoming glabrous and slightly encrusted, conspicuously 

 multizonate, isabelline to umbrinous with brown or black zones; 

 margin very thin, lobed, often somewhat proliferous; context 

 pallid, membranous; tubes punctiform, white within, often more 

 or less radiately arranged, mouths minute, angular, about 6 

 to a mm., edges white to slightly yellowish and finally discolored, 

 very thin, easily splitting, denticulate. 



Occasional on dead branches of deciduous trees in New 

 England, New York, Iowa, and Missouri. 



5. CORIOLUS LLOYDII Murrill 



Pileus rather thin, laterally connate, rigid, tough, cuneate to 

 flabelliform, applanate, tubercular-sessile, 2-3 X 3-4 X 0.2-0.4 

 cm.; surface white to isabelline, scabrous, somewhat rugose, 

 marked with a few narrow, indistinct, pale-latericeous zones; 

 margin thin, fertile, irregular, lobed; context punky-fibrous, 

 white, 1.5-2 mm. thick; tubes 1-1.5 mm. long, white within, 

 mouths angular, subglistening, 4 to a mm., edges thin, firm, 

 dentate, white to isabelline; spores globose, 2 p. 



Collected once on dead wood at Mammoth Cave, Kentucky. 



6. CORIOLUS CONCENTRICUS Murrill 



Pileus thin, firm, slightly flexible, flabelliform, conchate, 

 depressed behind, attached by a narrow base, 4 X 6 X 0.2-0.4 



