NORTHERN POLYPORES 29 



base, with surface and substance resembling that of the pileus 

 but darker in color, 4-5 cm. long, 1-1.5 cm. thick. 



Frequent on the ground in woods in New York, Massachusetts, 

 and southward. 



7. SCUTIGER WHITEAE Murrill 



Pilei cespitose, often confluent at the base, all stages of develop- 

 ment being found in one cluster; pileus subcircular in outline, 

 convex, depressed at the center, 8-12 X 0.5-1 cm.; surface 

 pruinose, velvety to the touch, isabelline to fulvous; margin 

 acute, at first inflexed, irregularly undulate at maturity; context 

 fleshy-tough, 0.2-0.5 cm. thick, of nutty flavor, rose-tinted when 

 dry, dark-red next to the tubes; tubes 0.1-0.3 cm. long, 3 to a 

 mm., very decurrent, white when young and fresh, rose-colored 

 when bruised or dried, mouths circular or subcircular, edges thin, 

 fimbriate; spores ovoid, smooth, copious, 3.5 X 5/x; stipe short, 

 usually eccentric, enlarged at the base, 3 X 2-4 cm., concolorous, 

 tough. 



Occasional in damp, shaded places in New England. 



15. GRIFOLA (Micheli) S. F. Gray 



Hymenophore large, annual, stipitate, compound, intricately 

 branched or lobed, humus-loving or epixylous, rarely terrestrial, 

 usually found at the base of a tree-trunk; surface smooth, 

 pallid to gray or brown; context white, fleshy or fleshy-tough, 

 rigid and fragile when dry; tubes large, irregular, thin-walled, 

 becoming friable or laciniate with age; spores hyaline, smooth 

 or rarely verrucose. 



Hymenium ochraceous, becoming dirty-yellow with age; plants 

 terrestrial, irregularly confluent, olivaceous to greenish- 

 yellow. I. C. flavovirens. 

 Hymenium at first fuliginous, becoming paler. 2. G. Sumstinei. 

 Hymenium white or pallid from the first. 



Surface of pileus gray or grayish-brown to coffee-colored; 

 stipe intricately branched; pileoli very numerous 

 and small. 



Pileoli lateral, spatulate or dimidiate. 3. G. frondosa. 



Pileoli centrally attached, circular and umbilicate. 4. G. ramosissima. 



Surface of pileus pallid or alutaceous; stipe not intricately 

 branched, lobes usually few in number and com- 

 paratively large. 

 Sporophore of immense size, 20-60 cm. in diameter; 



spores echinulate, 8-9 p. 5. G. Berkeleyi. 



Sporophore small for the genus, only 10 cm. or less in 



diameter; spores smooth, ovoid, much smaller. 6. G. Peckiana. 



