TROPICAL POLYPORES 99 



7. GANODERMA SUBINCRUSTATUM Murrill 



Pileus corky, circular to fan-shaped, plane above, 4-8 X 6-8 X 

 1-2 cm.; surface glabrous, shallowly sulcate, slightly zonate, 

 laccate, lustrous, yellowish-red to bay or dark-brown; margin 

 cream-colored, sterile, finely tomentose, obtuse to subacute, 

 undulate to lobed ; context punky to soft-corky, slightly zonate, 

 homogeneous, isabelline, slightly darker next to the tubes, fulvous 

 with age, I cm. thick; tubes annual, 3-5 mm. long, avellaneous 

 within, mouths circular to slightly angular, whitish-stuffed, 4 to 

 a mm., edges obtuse, entire, stramineous, becoming thinner and 

 very pale avellaneous; spores ellipsoid, dark-brown, 8X4/4; 

 stipe central to lateral, cylindric, subequal, 1-5 cm. long, 1-2 cm. 

 thick, resembling the pileus in surface and context, but almost 

 black in color. 



Common on dead wood throughout. 



8. GANODERMA ARGILLACEUM Murrill 



Pileus corky, dimidiate to circular, plane above, usually convex 

 below, 5-10 X 8-12 X 2-4 cm.; surface glabrous, rugose, not con- 

 spicuously marked, laccate but not lustrous, avellaneous to dull- 

 chestnut-colored; margin cream-colored, broad, subobtuse to 

 acute, straight, entire; context punky, concentrically banded, 

 isabelline above, fulvous below, 5-10 mm. thick; tubes annual, 

 5-10 mm. long, avellaneous within, mouths angular, 3-4 to a 

 mm., edges thin, subentire, white to avellaneous, reddish-brown 

 when bruised; spores ovoid, dark-brown, 12 X 7 V, stipe central 

 to lateral, short, often wan ting, smooth, glabrous, laccate, lustrous, 

 bay to black, 1-2 X i cm., substance corky, otherwise like that 

 of the pileus. 



Occasional on dead trunks in Mexico, Cuba, St. Croix, and 

 Grenada. 



9. GANODERMA PARVULUM Murrill 



A very small sessile fungus, shining-bay above and honey- 

 yellow below; pileus woody, nearly circular in outline, attached 

 by a point, convex above, plane or convex below, thickest behind, 

 2 X 2.5 X I cm. ; surface glabrous, laccate, azonate, slightly tuber- 

 cular, very lightly marked with a few concentric furrows, margin 

 acute; context soft-woody, pale-ochraceous, 0.5 cm. thick, with 

 dark, horny radiations from the point of attachment; tubes not 

 stratified, 3 mm. long, 5 to a mm., umbrinous within, mouths 

 polygonal, honey-yellow, edges entire, obtuse; spores subglobose, 

 smooth, pale-yellowish-brown, 5 X 4 p.. 



Found once on decayed wood in Nicaragua. 



