NORTHERN POLYPORES 35 



isabelline, membranous; tubes very short, grayish-isabelline 

 within, mouths fairly regular, circular to slightly angular, 3-4 

 to a mm., edges white to grayish-white and finally isabelline, 

 rather thick at first, becoming thin, entire and slightly uneven. 

 Occasional on dead wood from Pennsylvania to southern 

 Michigan and southward. 



22. FUNALIA Pat. 



Hymenophore annual, epixylous, sessile, dimidiate, often semi- 

 resupinate; surface anoderm, hairy to aculeate; context light- 

 brown, more or less duplex, spongy above, coriaceous to woody 

 below; tubes usually large, thin-walled, more or less lacerate; 

 spores smooth, hyaline. 



i. FUNALIA STUPPEA (Berk.) Murrill 



Pileus corky to woody, variable in size, dimidiate, decurrent, 

 imbricate, convex above, 2-6 X 5-12 X 0.5-3 cm.; surface 

 ferruginous to fulvous, hirsute to villose, azonate, sulcate at 

 times; margin thin or rounded, concolorous, entire or slightly 

 undulate; context isabelline, zonate, corky to woody, duplex 

 in large specimens, being softer above, 0.3-1.5 cm. thick; tubes 

 rather long, 3-12 mm., whitish-isabelline within, mouths rather 

 variable in size, subcircular to angular, distorted with age, 

 averaging about I mm. in diameter, edges thin, fimbriate to 

 toothed, isabelline to fuscous; spores oblong or slightly curved, 

 11-13 X 3-5-4 A*- 



Frequent throughout on dead poplar trunks and less common 

 on willow and a few other trees. Very similar in some of its 

 forms to Trametes hispida Bagl. of Europe. 



23. HAPALOPILUS P. Karst. 



Hymenophore annual, rarely perennial, epixylous, sessile, 

 dimidiate, simple or imbricate; surface anoderm, rarely pellicu- 

 lose, zonate or azonate, usually brown and glabrous; context 

 brown, leathery or corky, tough or rarely friable when dry; 

 hymenium usually differently colored, tubes small, thin- walled; 

 spores small, usually ovoid, hyaline. 



Hymenium concolorous; context soft and friable. I. H. rutilans. 



Hymenium differently colored; context rigid or corky, not friable. 2. H. gilvus. 



i. HAPALOPILUS RUTILANS (Pers.) Murrill 



Pileus thick, convex above and below, very soft, fleshy, 

 dimidiate, usually broadly attached, more or less imbricate at 



