TROPICAL POLYPORES 103 



undulate to lobed; context milk-white, floccose, homogeneous, 

 2-4 mm. thick; tubes very variable in shape, circular to laby- 

 rinthiform and lamelloid, narrow, hardly exceeding 0.5 mm. in 

 breadth, 2-3 mm. deep, white within, edges white to discolored, 

 thin, uneven, dentate with age; spores oblong, smooth, hyaline, 

 5-8 X 2-3 M . 



Extremely common throughout on dead wood of various kinds. 



4. DAEDALEA MICROSTICTA Cooke 



Pileus corky, applanate, 10-15 cm - broad and 3 cm. thick 

 behind; surface glabrous, papillose, pale- wood-colored, margin 

 acute, lineate-f uscous ; context isabelline to umbrinous, punky to 

 corky; hymenium varying from poroid to very narrowly laby- 

 rinthiform, the edges of the furrows being at first pallid and later 

 becoming fuscous and lacerate. 



Frequent on dead wood in Mexico and Central America. 

 Described from Rio de Janeiro, Brazil. 



5. DAEDALEA SPRUCEI Berk. 



Pileus corky, flexible, very large, applanate, concave below, 

 dimidiate to fan-shaped, thicker behind, 10-20 X 15-30 X 1-2.5 

 cm.; surface multizonate, slightly furrowed, finely tomentose to 

 glabrous, rugose, sometimes tuberculose, dark-avellaneous or 

 umbrinous, becoming blackish behind; margin thin, zonate, 

 pallid ; context zonate, soft-corky, isabelline, nearly fulvous when 

 dry, 3-5 mm. thick; tubes daedaleoid, becoming irpiciform, 

 white within, unctuous to the touch, 2-3 mm. broad, 1-2 cm. 

 deep, edges thick, firm, soon splitting into flattened teeth, 

 isabelline to fulvous or fuliginous; spores globose, smooth, 

 brownish, 4-6 /*. 



Occasional on dead trunks in Mexico, as well as in British 

 Guiana and Brazil. This species or a closely related one has 

 been found several times recently in Cuba, sometimes on living 

 trunks. 



49. LENZITES Fries 



Hymenophore small, annual, epixylous, sessile, conchate; 

 surface anoderm, usually zonate and tomentose; context white, 

 coriaceous, flexible; hymenium lamellate, the radiating gill-like 

 dissepiments connected transversely at times, especially in 

 youth; spores smooth, hyaline. 



