64 NORTH AMERICAN FLORA [VOLUME 9 
38. ABORTIPORUS Murrill, Bull. Torrey Club 31: 421. 1904. 
Hymenophore annual, tough, humus-loving: stipe normally central, often obsolete : 
context yellowish-white, duplex, spongy above, woody below, tubes thin-walled, mouths 
polygonal: spores subglobose, smooth, hyaline. 
Type species, Boletus distortus Schw. 
1. Abortiporus distortus (Schw.) Murrill, Bull. Torrey 
Club 31: 422. 1904. 
Boletus distortus Schw. Schr. Nat. Ges. Leipzig 1: 97. 1822. ee 
Polyporus abortivus Peck, Bot. Gaz. 6: 274. 1881. (Type from Illinois.) 
Pileus normally thin, plane or depressed, circular and centrally stipitate when properly 
developed, but often aborted and very irregular, varying to entirely resupinate forms, 6-13 
cm. in diameter, 0.3-1 cm. thick ; surface conspicuously and compactly tomentose, anoderm, 
azonate, smooth, white to alutaceous; margin thin, undulate to lobed, concolorous: context 
soft and spongy above, hard and woody below, white or isabelline, 3-5 mm. thick ; tubes 
annual, decurrent, white, 1-5 mm. long, mouths irregular, variable, 2-3 to a mm., edges 
thin, entire to dentate: spores subglobose, smooth, hyaline, 5-7“ long: stipe central, 
unequal, very variable, often obsolete, resembling the pileus in surface and context. 
TYPE LOCALITY: North Carolina. : 
Hasitat; About stumps, roots and other dead wood of deciduous trees. 
DISTRIBUTION: Canada, and the United States west to Wisconsin and Texas. 
39. SCUTIGER Paulet, Traité Champ. £7. 37, f. 2-3. 1812? 
Albatrelius S, F. Gray, Nat. Arr. Brit. Pl. 1: 645. 1821. 
Caloporus Quél. Ench. Fung. 164. 1886. 
Hymenophore simple, terrestrial, annual, mesopous, usually bright-colored; surface 
anoderm, variously decorated: context white, rarely colored, fleshy to tough, rigid and 
fragile when dry ; hymenium porose, white or colored, tubes thin-walled: spores smooth, 
hyaline. 
Type species, Scutzger tubevosus Paulet. 
Surface of pileus uneven, squamose or rugose. 
Pileus sulphur-yellow, pleuropous, surface ornamented with imbricated 
floccose wart-like scales. 1. S. Blusii. 
Pileus brown. 
Tubes large, 1.5 mm. or more in diameter; surface of pileus orna- 
mented with imbricated tufts of appressed hairs. 2. S. retipes. 
Tubes small, 0.5 mm. in diameter ; pileus rugose. 3. S. decurrens. 
Surface of pileus smooth, tomentose or glabrous. 
Pileus light-colored. 
Pileus white. 4. S. cryptopus. 
Pileus yellow to red. 5. S. laeticolor. 
Pileus blue when fresh, changing to brown on drying. 
Tubes entire, becoming reddish-brown on drying; context ochra- 
ceous. 6. S. caeruleoporus. 
Tubes lacerate, fading to grayish-brown or dirty-white; context . 
nearly white. 7. S. holocyaneus. 
Pileus dark-colored, gray or brown. 
Stipe black and rooting. 
Pileus smoky-brown, subtomentose ; tubes regular, entire. 8. S. vadicatus, 
Pileus drab-colored, nearly glabrous ; tubes irregular, toothed. 9. S. subradicatus. 
Stipe neither black nor rooting. 
Pileus gray, glabtous or nearly so, margin very thin ; stipe short, 
concolorous. 10. S. gxiseus. 
Pileus brown. 
Stipe dark-purple, very thick; margin of pileus very obtuse. 11. S. persicinus. 
Stipe yellowish-brown, usually excentric; margin of pileus thin. 12. S. Whiteae. 
1. Scutiger Ellisii (Berk.) Murrill, Bull. Torrey Club 30: 427. 1903. 
Polyporus Ellisti Berk. Grevillea 7: 5. 1878. 
lade flavosquamosus Underw. Bull. Torrey Club 24: 84. 1897. (Type from Alabama, in pine 
woods.) 
Pilei cespitose ; pileus reniform, convex, 12-15 cm. broad, 1-2 cm. thick ; surface sul- 
phur-yellow with a greenish tinge, very rough, with broad, floccose, imbricated scales ; 
