Part 4, 1915] AGARICACEAE 289 
Pileus 5-12 em. broad. 3. L. carneotomeniosus. 
Tropical species. 
Pileus white or whitish at maturity, less than 1 em. broad. 4. L. ovizabensis. 
Pileus isabelline at maturity. 
Hymenophore mostly solitary; spores 7 X4 yu. 5. L. graminicola. 
Hymenophore gregarious to cespitose; spores 3.5 X2.5 yu. 6. L. subscyphoides. 
Pileus reddish-brown at maturity. 
Pileus 1-1.5 cm. broad. 7. L. seyphoides, 
Pileus 6-8 cm. broad. 8. L. tubarius. 
Pileus eRe scaly or coarsely fasciculate-scaly. 
Pileus 1.5-2.5 cm. broad; temperate species. 9. L. sulcatus, 
Pileus 3-8 em. broad; tropical species. 
Pileus 3-5 em. broad; surface white or yellowish with concolorous 
pyramidal fascicles. 10. L. pyramidatus. 
Pileus 5-8 cm. broad; surface white with brown, spot-like scales. 11. L. albellus. 
Pileus conspicuously velvety, strigose, or hispid, becoming glabrous at 
times in a few species. 
Pileus 2-7 cm. broad. 
Stipe glabrous or nearly so. 12. L. crinitus. 
Stipe conspicuously velvety or tomentose. 
Pileus isabelline; usually eccentric. 13. L. strigosus. 
Pileus dark-fulvous; confined to the tropics. 14. L. strigellus. 
Pileus pale-cinnamon to chestnut-brown; stipe slender, con- 
colorous. 15. L. velutinus. 
Pileus 8—20 cm. broad. 
Stipe 5-8 cm. long; temperate species. 16. L. levis. 
Stipe 1-2.5 cm. long; tropical species. 
Pileus white; spores narrowly ellipsoid, 6-8 X3-3.5 u 17. L. hirtus, 
Pileus isabelline; spores oblong-ellipsoid or somewhat fusiform, 
4-5 X1.5-2 yp. 18. L. hirtiformis. 
1. Lentinus suavissimus Fries, Syn. Gen. Lent. 13. 1836. 
Pileus thin, tough, peltate, convex and umbilicate or centrally depressed, 1.2-3 cm. broad; 
surface glabrous, even or striate on the margin, whitish to yellowish: context white, the odor 
agreeable, resembling that of melilot; lamellae denticulate, decurrent, sometimes wavy and 
anastomosing at the base, whitish or yellowish: spores minute, 5—6 X 2.5-3 w: stipe very short or 
obsolete, central, eccentric or almost lateral, white or whitish, about 2 mm. long and 2 mm. thick. 
Type Locatity: Smoland, Sweden. 
Hasrrat: Dead branches of willow and certain other deciduous trees. 
DistrisuTion: Northeastern United States; also in Europe. 
2. Lentinus umbilicatus Peck, Ann. Rep. N. Y. State Mus. 28: 51. 
1876. 
Lentinus omphalodes Fries, Hymen. Eur. 485. 1874. Not L. omphalodes Berk. & Curt. 1872. 
Lentinus americanus Peck, Bull. Torrey Club 29:72. 1902. 
Lentinus piceinus Peck, Bull. N. ¥. State Mus. 150: 33. 1911. 
Pileus fleshy but thin, tough, deeply umbilicate, gregarious to cespitose, 8-24 mm. broad; 
surface glabrous, hygrophanous, brownish-tan when moist, paler when dry; margin irregular 
or lobed: context having an agreeable taste and odor; lamellae adnate or decurrent, serrate 
on the edges, whitish: spores subglobose, hyaline, 4-6 u: stipe slender, glabrous, nearly even, 
tough, stuffed or hollow, central or eccentric, colored like the pileus, varying in length, 2-24 
mm. long, 2-3 mm. thick. 
Type LOCALITY: Lake Pleasant, New York. 
HasiraT: On decayed deciduous or coniferous wood. 
DistRIBUTION: Maine to Virginia and west to Idaho. 
In_ustrations: Ann. Rep. N. ¥. State Mus. 28: pl. 1, f. 15-19. 
3. Lentinus carneotomentosus (Batsch) Schrét. Krypt.-Fl. Schles. 31: 
554. 1889. 
Agaricus flabelliformis Schaeff. Fung. Bavar. 4: Ind. 20.1774. Not A. flabelliformis Scop. 
Agaricus carneotomentosus Batsch, Elench. Fung. 89. 1783. 
Agaricus conchatus Bull. Herb. Fr. pl. 298. 1786. 
Agaricus torulosus Pers. Syn. Fung. 475. 1801. 
Agaricus inconstans Pers. Syn. Fung. 475. 1801. 
Panus torulosus Fries, Epicr. Myc. 397, 1838. 
1772. 
