Part 2, 1908] POLYPORACEAE 83 
55. FAVOLUS Beauv. Fl. Oware 1: 1. pl. 7. 1805. 
Scenidiun Kuntze, Rev. Gen. 515. 1893. 
Hymenophore small, annual, epixylous, sessile, dimidiate or reniform ; surface azonate 
or multizonate; margin usually thin: context thin, leathery, isabelline or fulvous; tubes 
alveolar: spores smooth, hyaline. 
Type species, Favolus hirtus Beauv. 
Pileus less than 1 cm. thick. 
Surface marked with white and light-brown zones. 1. F. tenuts. 
Surface variegated with dark-brown and purple zones. 2, F. variegatus. 
Pileus 2-3 cm. thick ; surface azonate. 3. &. leprosus. 
1. Favolus tenuis (Hook.) Murrill, Bull. Torrey Club 32: 100. 1905. 
Boletus reticulaius Hook. in Kunth, Syn. Pl. 1: (9). 1822. (Type fromthe Andes.) Not #. reticu- 
latus Schaeff. 
Boletus tenuis Hook. in Kunth, Syn. Pl. 1: (10). 1822. 
Polyporus bivalvis Pers.; Gaud, Voy. Freyc. Bot. 168. 1826. (Type from Rawak.) 
Polyporus polygrammus Mont. Ann. Sci. Nat. II. 8: 365. 1837.” (Type from Cuba.) 
Hexagona orbiculata Fries, Fungi Guin. f. 9. 1837. (Type from Guinea.) 
Hexagona cervino-plumbea Jungh. Crypt. Javae 61. pl. 15, f. 32. 1838. (Type from Java.) 
Hexagona polygramma Fries, Epicr. Myc. 497. 1838.—Mont. Pl. Cell. Cuba 379. pl. 14, f. 3. 
1842. (Type from Cuba.) ; 
Hexagona tenuis Fries, Epicr. Myc. 498. 1838. 
Hexagona cingulata Lév. Ann. Sci. Nat. III. 2: 200. 1844. (Type from Hispaniola.) 
Hexagona similis Berk. Lond. Jour. Bot. 5: 4. 1846. (Type from Australia.) 
? Hexagona unicolor Fries, Nov. Symb. 101. 1851. (Type from Tropical America.) _ 
Hexagona Thwaitesii Berk. & Curt. Proc. Am. Acad. 4: 122. 1860. (Type from Bonin Island.) 
sere Javoloides Peck, Bull. Torrey Club 10: 73. 1883. (Type from the Roatan Islands, 
Honduras.) 
Hlexagona tenuis subtenuis Cooke, Grevillea 19: 103. 1891. (Type from Central America.) 
Pileus coriaceous, reniform, conchate or applanate, narrowly attached behind, 3-6 
5-11 X 0.1-0.3cm.; surface glabrous, polished, pale wood-colored to avellaneous-umbrinous, 
repeatedly narrowly zonate ; margin very thin, usually entire or slightly undulate: context 
membranous, pale-isabelline, 0.5-1 mm. thick ; tubes very short,1-2 mm. long, avellaneous 
within, mouths alveolar, circular to hexagonal, exceedingly variable in size in different 
collections, averaging 0.5-1 mm. in diameter, edges rather thick, firm, entire. 
TYPE LOCALITY: Between Popayan and Almaguer, Colombia. 
HABITAT: Dead deciduous wood. 
DISTRIBUTION : Tropical regions. 
ILLUSTRATION: Mont. Pl. Cell. Cuba Joc. cit. 
2. Favolus variegatus (Berk.) Murrill, Bull. Torrey 
Club 32: 101. 1905. 
?Hexagona papyracea Berk. Aun. Mag. Nat. Hist. 10: suppl. 379. 1843. (Type from Brazil.) 
Hexagona variegata Berk. Ann. Mag. Nat. Hist. II. 9: 196, 1852.—Proc. Am. Acad. 4: 122. 
1858. 
Pileus dimidiate to reniform, thin, coriaceous, 4-6 « 8-12 « 0.1-0.4 cm.; surface radi- 
ate-rugose, multizonate, velvety, becoming glabrous, chestnut-colored, variegated with 
chocolate-brown or bay-brown tints; margin very thin, slightly paler, blackening when 
bruised, entire to lobed: context very thin, 1 mm. or less thick, fibrous, isabelline to um- 
brinous; tubes very short, pale-umbrinous within, scarcely a mm. long, alveolar, subcir- 
cular to hexagonal, 1-2 to a mm., edges rather thick, firm, even, pallid to pale-umbri- 
nous: spores smooth, hyaline; hyphae 2-4 x. 
TYPE LOCALITY: Santo Domingo. 
Hapitat: Dead wood. . 
DISTRIBUTION : Tropical America. 
3. Favolus leprosus (Fries) Murrill. 
Hexagona leprosa Fries, Nov. Symb. 101. 1851. 
Pileus thick, pulvinate, undulate, narrowly attached and nearly circular to dimidiate, 
5-12 cm. broad, 3-5 cm. thick ; surface nearly smooth, azonate, short-tomentose in spots, 
finally glabrous, fulvous in dried specimens; margin thin, concolorous, dark-colored when 
