240 NORTH AMERICAN FLORA [ VoLUME 9 
15. RESUPINATUS (Nees) S. F. Gray, Nat. Arr. Brit. 
Pl. 1: 617. 1821. 
Agaricus § Resupinatus Nees, Syst. Pilze Schw. 197. 1817. 
Pileus coriaceous, with:a gelatinous upper stratum, reviving, sessile, at first resupinate: 
lamellae radiating from a central or eccentric point: spores hyaline: veil none. 
Type species, Agaricus applicaius Batsch. 
Pileus 1.5-5 cm. broad; lamellae white or yellowish. 
Surface of pileus villose-tomentose. 1. R. atrvocoeruleus. 
Surface of pileus pruinose or fibrillose, rarely hispid. . 
‘Temperate species. ? 2. R. griseus. 
Tropical species. . 
Surface of pileus entirely white; lamellae crowded. 3. R. cubensis. 
Surface of pileus grayish or fumosous; lamellae distant. 4. R. subbarbaiulus. 
Pileus 2-16 mm. broad. : 
Lamellae white or whitish; pileus campanulate, black or blackish. 
Pileus 2-4 mm. broad. 5. R. campanulatus, 
Pileus 4-7 mm. broad. 6. R. orizabensis. 
Lamellae creamy-yellow; pileus 6-12 mm. broad; surface pallid to brown- . 
ish, pruinose. ; 7. R. approximans. 
Lamellae violet-fulvous; pileus 5-15 mm. broad; surface reddish-brown, ; 
densely grayish-tomentose. 8. R. violaceofulvens. 
Lamellae cinereous to brown or black. 
Pileus 4-8 mm. broad. : 
Surface of pileus glabrous. 9. R. striatulus. 
Surface of pileus not glabrous. . 
Pileus gray or blackish with a tinge of blue. 10. R. applicatus. 
Pileus black or blackish-brown. 
Pileus pulverulent; lamellae broad. ll. R. niger. 
Pileus slightly hispid; lamellae narrow. 12. R. subbarbatus, 
Pileus 6-16 mm. broad, blackish with gray tomentum. 13, R. atropellitus. 
1. Resupinatus atrocoeruleus (Fries) Murrill, Mycologia 4: 214. 
1912. 
Agaricus atrocoeruleus Fries, Obs. Myc. 1:95. 1815. 
Agaricus (Pleurotus) barbatulus Berk. & Curt. Ann. Mag. Nat. Hist. III. 4: 287. 1859. 
Pleurotus atrocoeruleus Gill. Champ. Fr. 335. 1876. 
Pileus at first resupinate, becoming dimidiate, sessile, conchate, tough, often somewhat 
imbricate, 2-5 cm. broad; surface villose-tomentose, dark-blue, grayish, or brown, rarely pallid, 
margin often subglabrous, sometimes crenate-lobed: lamellae concentric, rather narrow, slightly 
ventricose, crowded, white or yellowish: spores ellipsoid, smooth, hyaline, sometimes curved, 
6-8 X4-5 uw; cystidia fusoid, hyaline, 50-75 X 10-15 x. 
Type Locality: Sweden. 
Hasttat: Dead wood of various kinds. 
DistRIBuTION: Throughout temperate North America; also in Europe. 
InLustrations: Schaeff. Fung. Bavar. pl. 246, f. 3,9; Saunders, Smith & Bennett, Myc. Illust. 
pl. 6. f. 1-3; Cooke, Brit. Fungi pl. 243 (289) B. 
ees Sydow, Fungi Exot. 203; Desmaz. Pl. Crypt. Fr. 2153; Ellis & Ev. N. Am. Fungi 
2. Resupinatus griseus (Peck) Murrill. 
Pleurotus atrocoeruleus griseus Peck, Ann. Rep. N. Y. State Mus. 44: 147 (35). 1891. 
Pleurotus griseus Peck, Bull. N. Y. State Mus. 131: 25, 1909. 
Pileus at first resupinate, becoming dimidiate, sessile, conchate, tough, often somewhat 
imbricate, 1.5-4 cm. broad; surface grayish or grayish-brown, clothed with rather coarse, 
pointed, white or grayish hairs, never dark-blue nor villose-tomentose, margin usually glabrous 
or becoming so: lamellae concentric, rather narrow, slightly ventricose, crowded, white or 
yellowish: spores pip-shaped, smooth, hyaline, 5-6 X2.5-3.5 u; cystidia fusoid, hyaline, 35-45 
X6-10 pw. 
TYPE LocaLity: Carrollton, New York. . 
Haprrat: On dead hickory trunks and other forms of deciduous wood. 
Distrisution: New England, New York, and west to Iowa. 
Exsiccati: Ellis & Ev. Fungi Columb. 1202. 
3. Resupinatus cubensis Murrill, sp. nov. 
Pileus fleshy, thin, dimidiate, semiresupinate at times, 2-4 em. broad; surface white, densely 
floccose-fibrillose, entirely smooth, margin not striate, upturned, concolorous: lamellae radi- 
