34 TROPICAL POLYPORES 



Pileus brown; stipe distinctly central. 



Margin entire. 16. H. portoricensis. 



Margin ciliate. 17. H. hondurensis. 



Tubes equally hexagonal. 



Pileus purple. 18. H. indurata. 



Pileus yellow or brown. 



Tubes merulioid. 19. H. brunneola, 



Tubes of normal length. 20. H. cucullata. 



i. HEXAGONA PRINCEPS (Berk. & Curt.) Murrill 



Pileus reniform, convex, 9 X 6 X 0.4-0.6 cm. ; surface fulvous, 

 finely tomentose, smooth; margin thin, entire or undulate, in- 

 flexed when dry; context fleshy- tough, white, opaque; tubes 

 decurrent, fuscous when dry, I mm. long, 4-6-angled, mouths 

 I X 1-5 mm., edges thin, dentate; spores ellipsoid; stipe lateral, 

 tapering downward, fulvous, velvety, 3 cm. long, 1-5 cm. thick. 



Found once on dead wood in Cuba and once in Costa Rica. 



2. HEXAGONA PSEUDOPRINCEPS Murrill 



Pileus reniform, convex, depressed behind, 3.5 X 4-5 X 0.5-1 

 cm.; surface glabrous, delicately radiate-striate, discolored on 

 drying; margin thick, entire, strongly inflexed when dry; context 

 fleshy-tough, white, opaque; tubes decurrent, white, discolored 

 on drying, 3-6 mm. long, 4-6-angled, mouths 1X2 mm., some- 

 times confluent in age, edges thin, entire or slightly toothed; 

 spores ellipsoid; stipe eccentric to lateral, concolorous, glabrous 

 or slightly hispid, 5 mm. long, 7 mm. thick. 



Found once on dead wood at Carmelita, Porto Rico. 



3. HEXAGONA MAXONI Murrill 



Pileus irregularly reniform, applanate, 1-2 X 1.5-3 X o.i cm.; 

 surface glabrous, tessellate, straw-colored on drying; margin thin, 

 denticulate, undulate to lobed; context fleshy-tough, membra- 

 nous, white, opaque; tubes slightly decurrent, darker than the 

 pileus, with a tinge of flesh-color, 0.5-1.5 mm. long, 4-6-angled, 

 mouths 1.5 X 2-3 mm., smaller near the margin, edges thin, 

 entire or undulate; spores ellipsoid; stipe lateral, tapering, con- 

 colorous, glabrous, 2-3 mm. long, 1-2 mm. thick, not umbilicate 

 above. 



Found once on dead wood in Guatemala. 



4. HEXAGONA FLORIDANA Murrill 



Pileus flabelliform, applanate, depressed behind, 2 X 2.5-3 X 

 0.2 cm.; surface finely hispid, pure-white, becoming straw-colored 



