Part 3, 1917] AGARICACEAE 145 
5 X 3y; stipe curved, slightly tapering upward, glabrous, whitish, hollow, with a tough rind, 
5 em. long, 3-5 mm. thick; volva rather delicate, narrow, avellaneous, 1-2 cm. long. 
TYPE LOCALITY: Moore Town, Jamaica. 
Hasirat: On the decaying roots of an upturned tree in a virgin forest. 
DistriBsuTIon: Known only from the type locality. 
20. Volvariopsis cubensis Murrill, Mycologia 3: 281. 1911. 
Volvaria cubensis Murrill, Mycologia 4: 332, 1912. 
Pileus firm, fleshy, rather tough, irregularly expanded, obtuse, solitary, 7 cm. broad; sur- 
face dark-smoky-brown, minutely fibrillose, not striate, the disk seal-brown and glabrous; con- 
text with strong, unpleasant odor; lamellae free, distant, subcrowded, rather broad, subventri- 
cose, heterophyllous; spores ellipsoid, smooth, uninucleate, about 5.5 X 3.5 y; stipe subcylindric, 
slightly enlarged above and below, concolorous but paler, glabrous, solid, tough, the apex pallid, 
6-7 cm. long, 7 mm. thick; volva thick and fleshy, cup-shaped, distant, bifid, concolorous. 
TYPE Locality: Santiago de las Vegas, Cuba. 
Hasirat: On the ground in a banana field. 
DISTRIBUTION: Santiago de las Vegas, Cuba, 
21. Volvariopsis Bakeri Murrill, Mycologia 3: 281. 1911. 
Volvaria Bakeri Murrill, Mycologia 4: 332. 1912. 
Pileus fleshy, ovoid to convex, densely gregarious, reaching a breadth of 10 cm.; surface 
dark-fuliginous, becoming much lighter with age, appressed-fibrillose from the cracking of the 
cuticle, not striate; context white, with mild taste and no appreciable odor; lamellae free, 
crowded, not very broad, white, becoming pink; spores broadly ellipsoid, rarely ovoid, smooth, 
roseous, 6-8 X 4-5 yw; stipe tapering upward, white, glabrous, solid, 8-9 cm. long, 1-1.5 cm. 
thick; volva free, open, dark-fuliginous, 3-4 cm. long, 2-3 cm. broad. 
TvPE LOcALITy: Santiago de las Vegas, Cuba. 
Hasitat: On a dead banana stump. 
DISTRIBUTION: Known only from the type locality. 
Subtribe 3. PHOLIOTANAE* 
Lamellae readily separable from the context. 
Stipe lateral or none. 62. TAPINIA. 
Stipe central or eccentric. 63, PAXILLUS. 
Lameliae not readily separable from the context. 
Volva and annulus absent; a slight, non-arachnoid, evanescent veil present 
at times in young stages. 
Pileus irregular, dimidiate or resupinate. 64, CREPIDOTUS. 
Pileus circular and centrally stipitate. 
Stipe cartilaginous. 
Lamellae not dissolving at maturity. 
Jamellae decurrent. 65, TUBARIA. 
Lamellae adnate or adnexed. 
Margin of pileus straight and appressed when young. 66. GALERULA. 
Margin of pileus incurved when young. 67. NAUCORIA. 
Lamellae free, rarely adnexed. 68. PLUTEOLUS. 
Lamellae dissolving at maturity, free or attached. 69. MycENna. 
Stipe fleshy, somewhat woody in certain species of Gymnopilus. | 
Lamellae long-decurrent, anastomosing behind; terrestrial species. 70. PHYLLOPORUS, 
Lamellae usually adnate or short-decurrent, not anastomosing; 
mostly wood-loving species, with spores ferruginous in mass. 71, GYMNOPILUS. 
Lamellae sinuate or adnexed, not‘anastomosing; terrestrial species 
with spores usually isabelline. : 
Pileus glabrous and viscid. Sas 72, HEBELOMA. 
Pileus silky or squamulose, slightly viscid in two or three : 
species. 73, INOCYBE. _ 
Volva or annulus present. [See next part for the remainder of this key, con- 
taining Pholiota, Cortinarius, and Locellina.] 
* See N. Am. Flora 9: 237, for a key to the four subtribes of the Agariceae. The Pholiotanae 
are distinguished by their spores, which are ochraceous, ferruginous, or fulvous. 
