72 NORTH AMERICAN FLORA [VoLuME 9 
1. Aurantiporus Pilotae (Schw.) Murrill, Bull. Torrey 
Club 32: 487. 1905. 
? Polyporus croceus Pers. Obs. Myc. 1: 87, 1796. (Type from Europe.) 
Polyporus Pilotae Schw. Trans, Am. Phil. Soc. II. 4: 157. 1832. 1 
Polyporus Pini-canadensis Schw. Trans. Am. Phil. Soc. II. 4: 157. 1832. (Type from Pennsyl- 
i vania, sald to have been found on hemlock.) type f Ohio.) 
olyporus hypococcinus Berk, Lond. Jour. Bot. 6: 319. 1847. (Type from 10.) | 
Polyporus castanophilus Atk. Jour. Myc. 8: 118. 1902. (Type from North Carolina, on rotten 
chestnut logs.) 
Pileus sessile, often subradicate, dimidiate, convex, 8-20 10-40 X 1-3 cm.; surface 
rugose, sodden, velvety, with short hairs, ochraceous or reddish-orange, soon fading, 
brownish behind; margin ochraceous, sterile, tumid, becoming thinner at maturity: con- 
text melleous, tough, watery, elastic, rigid when dry, conspicuously marked with sordid 
zones, odor strong, but not characteristic; tubes 5-10 mm. long, luteous-orange to bright- 
orange when fresh, becoming dark and resinous on drying, the mouths small, regular, 
concolorous, 4-5 to a mm., dissepiments thin, minutely fimbriate: spores smooth, hyaline, 
3-4 & 2-3 pe. 
TYPE LOCALITY: Pilot Mountain, North Carolina, on a dead chestnut trunk. 
HaBitaT: Much decayed oak and chestnut logs. 
DISTRIBUTION : Canada to North Carolina and west to Iowa; possibly also in Europe. 
ExsiccaTi1: Ellis & Ev. N. Am. Fungi 2508. 
45. FLAVIPORELLUS Murrill, Bull. Torrey Club 32: 485. 1905. 
Hymenophore small, annual, epixylous, sessile or substipitate, flabelliform, yellow 
throughout; surface anoderm, margin thin: context very thin and friable; tubes small, 
thin-walled, fragile: spores smooth, hyaline or yellowish. 
Type species, Polyporus Splitgerberi Mont. 
1. Flaviporellus Splitgerberi (Mont.) Murrill, Bull. Torrey 
Club 32: 486. 1905. 
Polyporus Splitgerberi Mont. Ann. Sci. Nat. II. 16: 109. 1841.—Syll. Crypt. 164. 1856. 
Polyporus sulphuratus Fries, Nov. Symb. 79. 1851. (Type from Mexico.) 
Polyporus rheicolor Berk. & Curt. Jour. Linn. Soc. 10: 313. 1868. (Type from Cuba.) 
Pileus thin, dimidiate to spatulate-cuneate, densely imbricate, gibbous behind, 24 
3-8 X0.1-0.2 cm.; surface anoderm, fibrose-radiate, subzonate, smooth, flavous-luteous 
with reddish-fulvous spots or zones, fulvous or umbrinous behind; margin very thin, sub- 
fibrous, inflexed or folded when dry, broadly sterile, golden-yellow: context radiate-fibrous, 
corky to woody, very hard next to the tubes, 1 mm. thick, bright shining-flavous; tubes 
annual, melleous within, scarcely a mm. long, mouths circular to angular, 4-6 to a mm., 
pale-luteous to melleous, edges very thin, becoming dentate-lacerate with age: spores 
smooth, ovoid or ellipsoid, subhyaline or pale-luteous, 4-5 >< 3; hyphae 3 thick. 
TYPE LOCALITY: Surinam, on dead standing trunks. 
HABITAT: Dead wood. 
DISTRIBUTION: Mexico; Cuba; also in Surinam. 
46. LAETIPORUS Murrill, Bull. Torrey Club 31: 607. 1904. 
Hymenophore annual, epixylous, fleshy, anoderm, cespitose-multiplex : context cheesy 
to fragile, light-colored; tubes thin-walled, fragile, bright-yellow, mouths irregularly 
polygonal: spores smooth, hyaline. 
Type species, Agaricus speciosus Batt. 
1. Laetiporus speciosus (Batt.) Murrill, Bull. Torrey 
Club 31: 607. 1904. 
Agaricus speciosus Batt. Fung. Hist. 68. 1755, 
Boletus sulphureus Bull. Herb. Fr. p/. 429. 1788. 
Boletus citrinus Planer, Ind. Pl. Erf. 26. 1788. 
Polyporus sulphureus Fries, Syst. Myc. 1: 357, 1821, 
Polypilus sulphureus Karst. Rev. Myc. 39: 17. 1881. 
Polypilus speciosus Murrill, Jour. Myc.9: 93. 1903. 
Polyporus cincinnatus Morgan, Jour. Cine. Soc. Nat. Hist. 6: 97. 1885. 
