TROPICAL POLYPORES 15 



circular, 5 to a mm., edges rather thick, firm, entire, white to 

 discolored, purplish-spotted when bruised; spores ovoid, 4 X 3 M- 

 Found once on dead wood in Mexico. 



25. CORIOLUS EFFUSUS Murrill 



Pileus very thin, flexible, broadly confluent, effused, shortly 

 reflexed, the reflexed portion convex, laterally elongate, pro- 

 jecting 3-7 mm.; surface finely tomentose, white or pale-yel- 

 lowish, slightly sulcate, especially near the margin, which is 

 broadly sterile, milk-white, undulate; context thin, white, mem- 

 branous; hymenium very irregular, varying according to the 

 position of the tubes, white or slightly yellowish; tubes very 

 short, mouths circular or much elongated radially, edges thin, 

 becoming lacerate-dentate or somewhat irpiciform. 



Frequent on dead wood in Jamaica. 



26. CORIOLUS PAVONIUS (Hook.) Murrill 



Pileus thin, coriaceous, flexible, dimidiate, imbricate, conchate, 

 3-5 X 4-7 X 0.1-0.2 cm.; surface multizonate, strigose-velvety, 

 pallid, becoming pale-cinereous with age; margin thin, white 

 or yellowish, sterile, entire or undulate; context white, fibrous, 

 about I mm. thick; tubes punctiform, less than I mm. long, 

 white to slightly yellowish within, mouths very regular in 

 normally developed specimens, circular to slightly angular, 

 4-6 to a mm., edges white to ochraceous, very thin, denticulate; 

 spores globose, 4 p. 



Common throughout on dead hardwood logs and sticks. 



27. CORIOLUS ORIZABENSIS Murrill 



Pileus many times imbricate, very slightly decurrent at times, 

 sessile, dimidiate or fan-shaped, conchate, thin, flexible, 2-3 X 

 3-5 X 0.2-0.3 cm.; surface white to slightly yellowish-discolored, 

 uneven, rugose, two or three times slightly sulcate, obscurely 

 zonate, appressed-fibrillose, margin undulate, somewhat abruptly 

 thickened, finely tomentose, conspicuously appressed-fibrillose, 

 subconcolorous ; context white, fibrous, I mm. thick; tubes 2 

 mm. long, pallid within, mouths large, irregular, glistening, 

 white to discolored, 2 to a mm. near the margin, I to a mm. 

 behind, edges thin, lacerate-dentate. 



Collected once on dead wood in moist woods near Orizaba, 

 Mexico. 



