102 TROPICAL POLYPORES 



Pileus 10-30 cm. broad. 



Furrows less than 0.5 mm. in trans verse diameter; surface 



white or yellowish. 



Context white. 3. D. amanitoides. 



Context isabelline to umbrinous. 4. D. microsticta. 



Furrows 2-3 mm. in transverse diameter; surface brownish. 5. D. Sprucei. 



i. DAEDALEA CONFRAGOSA (Bolt.) Pers. 



Pileus corky to woody, imbricate, sessile, dimidiate, convex 

 or plane above, variable in size, 2-7X3-10X0.5-1.5 cm.; 

 surface multizonate, rugose, scrupose, often tuberculose, becom- 

 ing glabrous, isabelline or avellaneous to latericeous-fuscous; 

 margin thin, entire to lobed, pallid, fertile, dark-brown when 

 bruised; context corky .to woody, white to avellaneous, zonate, 

 3-10 mm. thick; tubes very variable, porose or labyrinthiform, 

 often becoming lamellate with age, 0.5-1.5 mm. broad, 5-10 

 mm. deep, white or avellaneous within, mouths grayish-pruinose 

 when young, becoming umbrinous or reddish-fuscous, edges 

 thin, becoming lacerate-dentate and often fimbriate, turning at 

 once to yellowish-brown when bruised; spores smooth, hyaline, 

 cylindric to ellipsoid, 5-8 X 2-3 p. 



Found once on dead wood in Mexico. 



2. DAEDALEA FAVOLOIDES Murrill 



Pileus coriaceous, reniform, applanate or subconchate, nar- 

 rowly attached, 5-6 X 8-10 X 0.3 cm.; surface glabrous, some- 

 what rugose, narrowly, concentrically zonate-sulcate, avellaneous 

 or avellaneous-umbrinous tinged with bay, margin thin, lobed; 

 context very thin, punky, pallid to slightly yellowish -brown, 

 about 2 mm. thick; furrows 1-2 mm. deep, labyrinthiform, vary- 

 ing to circular or sublamellate in places, very narrow, about 2 to 

 a mm., avellaneous, becoming umbrinous with age, edges thin, 

 dentate to subirpiciform. 



Collected once on a fallen log in a moist virgin forest near 

 Jalapa, Mexico. Very similar to Favolus tennis above, but with 

 the hymenium partly tubular and partly furrowed. 



3. DAEDALEA AMANITOIDES Beauv. 



Pileus very thin and large, flexible, corky-woody, subsessile, 

 usually attached by an orbicular peltate base, explanate, um- 

 bilicate, circular to fan-shaped, variable, 8-20 X 15-30 X 0.2- 

 0.5 cm.; surface varying from entirely azonate to zonate, and 

 from milk-white to partly avellaneous, glabrous, slightly sulcate, 

 sometimes blackening behind with age; margin thin, white, 



