SOUTHERN POLYPORES 9 



9. CORIOLUS MEMBRANACEUS (Sw.) Pat. 



Pileus very thin, densely imbricate, dimidiate or flabelliform, 

 conchate, 2-4 X 3-6 X 0.1-0.2 cm.; surface multizonate, finely 

 radiate-furrowed, short-tomentose to glabrous and subshining, 

 white or pallid with slightly darker zones; margin very thin, 

 undulate or lobed, usually splitting with age; context white, 

 fibrous, 0.5-1.5 mm. thick; tubes very short, less than I mm., 

 white to discolored within, mouths angular, 4-6 to a mm., 

 edges very thin, denticulate, fimbriate with age, white to isa- 

 belline or nearly fulvous in dried specimens; spores globose, 4-5 M- 



Found once or twice on dead wood at New Orleans, Louisiana, 

 Extremely common in tropical America, where it was first 

 described from Jamaica. 



10. CORIOLUS NIGROMARGINATUS (Schw.) Murrill 



Pileus confluent-effused, more or less imbricate, dimidiate, 

 applanate, corky-leathery, rather thick, flexible or rigid, 3-5 

 X 5-8 X 0.3-0.8 cm.; surface conspicuously hirsute, isabelline 

 to cinereous, concentrically furrowed and zoned; margin at 

 length thin, often fuliginous, sterile, finely strigose-tomentose, 

 entire or undulate; context white, thin, fibrous, spongy above, 

 1-4 mm. thick; tubes white, 1-2 mm. long, mouths circular to 

 angular, 4 to a mm., quite regular, edges thin, firm, tough, entire, 

 white to yellowish or umbrinous; spores cylindric, slightly 

 curved, 2.5-3 M- 



Extremely common throughout on all forms of dead deciduous 

 wood. 



ii. CORIOLUS SERICEOHIRSUTUS (Klotzsch) Murrill 



Pileus very thin, flexible, effused-confluent, sometimes wholly 

 resupinate, conchate-reflexed, 0-3 X 2-6 X 0.05-0.1 cm.; surface 

 conspicuously silky-villose to strigose-hirsute, multizonate, pale- 

 brown to hoary, with slightly darker zones; margin thin, entire 

 or undulate, dentate or eroded with age; context thin, white, 

 membranous; tubes shallow, 1-1.5 mm - deep, white to slightly 

 discolored within, mouths hexagonal, irregular, very variable 

 in size, 0.3-1 mm. in diameter, edges thin, denticulate to dentate, 

 white to discolored, sometimes becoming umbrinous; spores 

 6 X 4/x. 



Frequent throughout on dead trunks and branches of red 

 cedar. Also extending northward occasionally into the middle 

 states. 



