114 NORTH AMERICAN FLORA [Vorume 9 
2. Elfvingia fasciata (Sw.) Murrill, Bull. Torrey 
Club 30: 298. 1903. 
Boletus fasciatus Sw. Prodr. 149. 1788. 
Polyporus sclerodermeus Lév. Ann. Sci. Nat. III. 5: 129. 1846. (Type from Guadeloupe.) 
Polyporus marmoratus Berk. & Curt, Proc. Am. Acad. 4: 122, 1858. (Type from Nicaragua.) 
Fomes subfomentarius Romell, Bih, Sv. Vet.-Akad. Hand]. 26 (3)16: 19. j901. (Type from Matto 
Grosso, Brazil.) a 
Myriadoporus Dussti Pat. Bull. Soc. Myce. Fr.5: 85. 1889. (Type from Martinique.) 
Pileus hard, woody, dimidiate, applanate to ungulate, convex above, 7-10 K 8-15 X 2-6 
cm.; surface finely tomentose, at length glabrous, concentrically sulcate, at first mole- 
colored, changing to umbrinous, and finally avellaneous with black fasciations; margin 
acute to obtuse, isabelline, sterile, undulate or entire: context punky, thin, ferruginous 
to fulvous, zonate, 3-5 mm. thick; tubes indistinctly stratified, 5-10 mm. long each season, 
avellaneous within, mouths circular, minute, 4-5 to a mm., edges obtuse, avellaneous to 
umbrinous, becoming darker when bruised: spores subglobose, smooth, light-brown, 5-7 4; 
hyphae brown, 4-6; cystidia none. 
TYPE LOCALITY: Jamaica. 
HasitaT: Dead trtinks of various trees. 
DISTRIBUTION: Gulf states and tropical America, 
ILLUSTRATION: Romell, Joc. cit. pl. 1, f. 27; pl. 2, f. 35, 36. 
ExsiccaTi: Ellis & Ev. N. Am. Fungi 7702. , 
3. Elfvingia lobata (Schw.) Murrill. 
Polyporus lobatus Schw. Trans. Am. Phil. Soc. II. 4: 157. 1832. 
Polyporus rentformis Morgan, Jour, Cinc. Soc, Nat. Hist. 8: 103. 1885. (Type from Ohio.) 
Elfvingia rentformis Murrill, Bull. Torrey Club 30: 299. 1903. 
Pilens woody, applanate, reniform to dimidiate, 5-8 10-15 x 1-2.5 cm.; surface con- 
centrically sulcate, subzonate, glabrous, ferruginous to fulvous, becoming grayish-brown 
with age; margin thin, rarely rounded, creamy-white, smooth, entire : context punky with 
some horny fibers, chestnut-colored, slightly zonate, 5-8 mm. thick ; tubes annual, 5-8 mm. 
long each season, avellaneous within, mouths circular, 4-5 to a mm., edges obtuse, entire, 
cremeous to umbrinous, becoming brownish when bruised: spores ovoid, dark-brown, 
asperulate, 8-10 < 6-7; hyphae fulvous, 3-5 in diameter. 
TYPE LOCALITY: Salem, North Carolina. 
HaBitTaT: Stumps and diseased trunks of certain deciduous trees, especially the white oak. 
DISTRIBUTION : New York to Alabama and west to Missouri. 
4. Elfvingia megaloma (Lév.) Murrill, Bull. Torrey 
Club 30: 300. 1903. 
Polyporus megaloma Lév. Ann. Sci. Nat. III. 5: 128. 1846. 
Polyporus leucophaeus Mont. Syll. Crypt. 157. 1856. (Type from Ohio.) 
Fomes megaloma Cooke, Grevillea 14: 18. 1885. 
Pileus hard, woody, dimidiate, applanate, 6~15 > 8-30 1-4 cm.; surface milk-white to 
gray or umbrinous, glabrous, concentrically sulcate, encrusted, fasciate with obscure lines, 
conidia-bearing, usually brownish during the growing season from the covering of conidia ; 
margin obtuse, broadly sterile, white or slightly cremeous, entire to undulate: context 
corky, usually rather hard, zonate, fulvous to bay, 5-10 mm. thick, thinner with age; tubes 
very evenly stratified, separated by thin layers of context, 5-10 mm. long each season, avel- 
laneous to umbrinous within, mouths circular, 5 to a mm., whitish-stuffed when young, 
edges obtuse, entire, white or slightly yellowish to umbrinons, quickly chan ging color when 
bruised : spores ovoid, smooth or very slightly roughened, pale yellowish-brown, truncate 
at the base, 7-8 X 5-64. 
TYPE LOCALITY: New York. 
HasitaT: Abundant on dead or diseased trunks or timber of most deciduous trees: also on 
conifers in certain sections. 2 
DISTRIBUTION : Canada to the mountains of Alabama and west to California. 
EXsICcaTI: Thiim. Myc. Univ. 1804; Rab.-Wint. Fungi Eur. : i i i 
Peg aes eee) gi Eur. 3736; Ellis, N. Am. Fungi 801 ; 
