46 SOUTHERN POLYPORES 



i. FOMES ROSEUS (Alb. & Schw.) Cooke 



Pileus woody, dimidiate, varying from conchate to ungulate, 

 often imbricate and longitudinally effused, 2-4 X 6-8 X 0.5-3 

 cm.; surface rugose, subfasciate, slightly sulcate, rosy or flesh- 

 colored, becoming gray or black with age; margin acute, becoming 

 obtuse, sterile, pallid, often undulate; context floccose-fibrous to 

 corky, rose-colored, 0.2-2 cm. thick; tubes indistinctly stratose, 

 1-2 mm. long each season, mouths circular, 3-4 to a mm., edges 

 obtuse, concolorous; spores ellipsoid, smooth, thick-walled, 

 subhyaline, 3.5 X 6 /*. 



Common throughout on living or dead trunks of conifers, and 

 occasionally on deciduous trees, causing a serious rot. The 

 variation in the form of the hymenophore from conchate to ungu- 

 late is sometimes very puzzling. 



2. FOMES FRAXINEUS (Bull.) Cooke 



Pileus corky to woody, dimidiate, applanate, usually imbri- 

 cate, often laterally confluent, thinner in American forms, 4-10 

 X 6-15 X 1-6 cm.; surface velvety to glabrous, zonate at times, 

 concentrically sulcate with age, at first white owing to a covering 

 of fine waxy hairs, becoming bay and finally nearly black with 

 age; margin thin or tumid, sterile, cream-colored, pulverulent 

 with reddish blotches, becoming dark and hygrophanous when 

 bruised; context punky, becoming corky, isabelline, tinged with 

 carneous when fresh, 0.5-5 cm - thick; tubes indistinctly strati- 

 fied, 0.5-1 cm. long each season, isabelline when old, reddish- 

 flesh-colored in the younger layers, mouths subcircular, 4 to a 

 mm., edges obtuse, entire, light-flesh-colored, covered at first 

 with a white waxy coat, quickly changing to a darker color when 

 bruised; spores subglobose, smooth, subhyaline, 6-7 X 5-6/*. 



Occasional on trunks and stumps of certain deciduous trees in 

 Louisiana. 



3. FOMES SCUTELLATUS (Schw.) Cooke 



Pileus woody, dimidiate or scutellate, concave below, 0.5-0.7 

 X 1-1.5 X 0.3-0.5 cm.; surface rugose, tuberculose, zonate, 

 fuscous-black; margin acute, deflexed, pallid to light-brown; 

 context woody, indistinctly zonate, isabelline, 2-3 mm. thick; 

 tubes indistinctly stratified, 1-1.5 m m- l n g eacn season, isa- 

 belline within, mouths subcircular to rhomboid, 4 to a mm., 

 edges rather thin, obtuse, entire, chalk-white, becoming avel- 

 laneous. 



Frequent throughout on dead branches and timbers of alder, 

 witch hazel, and other deciduous trees and shrubs. 



