50 NORTHERN POLYPORES 



1-3 cm. thick, fulvous; tubes stratose, 0.15-0.5 cm. long, 5 to a 

 mm., fulvous, mouths subcircular, edges entire, equaling the 

 tubes in thickness; spores subglobose, smooth, thin-walled, 

 ferruginous, 4-5 /JL. 



Common throughout the range of its host, Robinia Pseud-acacia, 

 causing a very serious rot of this tree. The sporophores were 

 formerly used by colored people for keeping fire over night. 



2. FULVIFOMES EvERHARTii (Ellis & Gall.) Murrill, comb. nov. 



Pileus dimidiate, ungulate, broadly attached behind, 6-10 

 X 6-15 X 3-8 cm.; surface glabrous, slightly encrusted, deeply 

 sulcate, not polished, gray to brownish-black, slightly rimose in 

 age; margin obtuse, covered with ferruginous tomentum, becom- 

 ing gray and glabrous; context corky to woody, repeatedly zoned, 

 fulvous in dried specimens, 2-3 cm. thick; tubes evenly strati- 

 fied, 0.5-1 cm. long each season, fulvous, mouths circular, 4 to a 

 mm., edges rather thin, entire, ferruginous to fulvous, glistening, 

 the hymenium becoming much cracked in age; spores globose, 

 smooth, ferruginous, 3-4.5^1; cystidia abundant, pointed, larger 

 at the base, 15-25 X 6-10 ju. 



Frequent throughout on living oak trunks and occasionally 

 on beech, causing decay. 



3. FULVIFOMES RIBIS (Schum.) Murrill, comb. nov. 



Pileus tough, corky, becoming rigid, conchate, laterally con- 

 nate, 3-5 X 5-10 X 0.7-1.5 cm.; surface rough, velvety, ano- 

 derm, indistinctly zoned, ferruginous to umbrinous, becoming 

 glabrous and slightly encrusted with age; margin undulate to 

 lobed, ferruginous, furrowed; context punky, fulvous, 3-5 mm. 

 thick; tubes indistinctly stratified, 1-2 mm. long each season, 

 fulvous, mouths circular, 5-6 to a mm., edges rather thin, entire, 

 ferruginous to fulvous, hoary when young; spores globose or 

 subglobose, pale-yellowish-brown, smooth, 3-4 X 3 At. 



Occasional throughout on living stems of species of Ribes, 

 and very rarely on other shrubs growing near the usual hosts. 



4. FULVIFOMES JUNIPERINUS (Schrenk) Murrill, comb. nov. 



Pileus ungulate, 3-5 X 5-8 X 5-7 cm.; surface tomentose, 

 deeply sulcate, reddish-brown to dark-brown; margin obtuse, 

 velvety, melleous or ferruginous to hoary; context woody, 

 reddish-brown, 0.5-2 cm. thick; tubes indistinctly stratified, 

 0.5-1 cm. long each season, melleous within, reddish-brown in 



