28 NORTHERN POLYPORES 



tomentose, subsquamulose, brown or reddish-brown; margin 

 thin, concolorous, incurved when dry; context soft, spongy, 

 white, homogeneous, 3-6 mm. thick; tubes decurrent, short, 

 white to isabelline, mouths subcircular, 2-3 to a mm., edges thin, 

 white or yellowish, entire; spores ovoid or ellipsoid, smooth, 

 12-16 X 6-8 fj.; stipe central, fusiform, cylindric above, expanding 

 into the pileus, elastic, solid, velvety, reticulate, pale-fulvous, 

 black and rooting below. 



Frequent throughout most of the region about rotten stumps 

 or trunks. Polyporus hispidellus Peck differs in its stiff, erect 

 hairs, lateral or eccentric stipe, and smaller spores. It is occa- 

 sional northward, extending across the continent from Prince 

 Edward Island to Washington. 



5. SCUTIGER SUBRADICATUS MurHll 



Pileus irregular in outline, convex to plane, 12 X 9 X 0.5 cm.; 

 surface fibrillose, drab-colored to isabelline; margin very thin, 

 inflexed when young, irregularly undulate at maturity; context 

 fleshy-tough, 1-7 mm. thick, milk-white even when dry; tubes 

 mere areoles at first, short and small at maturity, scarcely I mm. 

 in length, 3-4 to a mm., decurrent to the blackened part of the 

 stipe, white, yellowish when dry, mouths polygonal, regular, at 

 length much elongate by confluence or otherwise irregular, 

 edges thin, toothed or fimbriate when mature; spores ovate to 

 ellipsoid, smooth, hyaline, not abundant, 5-7X3-4^; stipe 

 short, thick, central, tapering and attached at the base, sooty- 

 black up to the pores, 4 X 2.5 cm.; context milk-white, firm, 

 fleshy-tough, surface minutely tomentose, rugose-reticulate when 

 dry. 



Found occasionally attached to buried dead wood in Ontario, 

 New York, and Wisconsin. 



6. SCUTIGER GRISEUS (Peck) Murrill 



Pileus circular, often irregular, convex, 7-12 cm. broad, I cm. 

 or less thick; surface glabrous or minutely tomentose, cinereous, 

 slightly darker towards the center; margin thin, concolorous, 

 often incurved on drying, irregular, undulate to lobed; context 

 soft-fleshy, rosy-gray, about 5 mm. thick; tubes slightly decur- 

 rent, 1-2 mm. long, whitish-stuffed when young, white to pale- 

 umbrinous within, mouths subangular, unequal, 2-4 to a mm., 

 edges thin, entire to fimbriate, lacerate with age, white when 

 young, becoming gray or umbrinous; spores subglobose, echinu- 

 late, 5-6 X 4.5-5^1; stipe central, thick, short, bulbous at the 



