Part 5, 1916] AGARICACEAE 339 
lamellae adnate, rather crowded, of medium breadth, thin and delicate, pure-white: spores 
subglobose to ellipsoid, smooth, hyaline, 6-7 X 5-6 u: stipe equal, dry, smooth, glabrous, 
concolorous, hollow, with a thin rind, 6-8 cm. long, about 5 mm. thick. 
Type collected on the ground among leaves and bits of dead wood at Sequim, Washington, 
J. M. Grant 332 (herb. N. Y. State Mus.). 
DistRIBUTION: Known only from the type locality. 
88. Prunulus Myrciae (Pat.) Murrill. 
Androsaceus Myrciae Pat. Bull. Soc. Myc. Fr. 15: 192. 1899. 
Pileus very minute, orbicular, convex-campanulate, obtuse, cespitose, 1-2 mm. broad; 
surface white, changing to lemon-yellow on drying and becoming tinged with russet on the 
disk, smooth or slightly striate, pellucid, fleshy, covered with a pellicle formed of rounded, 
hyaline, verrucose cells reaching 8-12 » in diameter: lamellae white, few, quite thick, adnate to 
slightly decurrent, inserted, not connected by veins: spores ovoid, smooth, hyaline, 5 X 3 u: 
stipe white, cylindric, delicate, almost filiform, equal or scarcely enlarged below, 4-6 mm. long, 
pubescent over its entire surface with cylindric, unicellular hairs which are scattered or in 
tufts. 
TYPE LOCALITY: Guadeloupe. 
Hasrrat: On dying leaves of Myrcia. 
DISTRIBUTION: Known only from the type locality. 
89. Prunulus alphitophorus (Berk.) Murrill. 
Agaricus (Mycena) alphitophorus Berk. Jour. Linn. Soc. 15: 48. 1877. 
Mycena alphitophora Sacc. Syll. Fung. 5: 290. 1887. 
Pileus conic-campanulate, 2 mm. broad; surface white, farinaceous: lamellae narrow, 
ascending, white: stipe filiform, white, 12-25 mm. long. 
Type Locality: Bermuda. 
Hasitrat: On small twigs in marshes. 
DIstRIBUTION: Known only from the type locality. 
90. Prunulus subpulverulentus Murrill, sp. nov. 
Pileus minute, delicate, conic to campanulate, gregarious to subcespitose, 4 mm. broad; 
surface striate, pulverulent, snow-white with a creamy tint, margin entire, appressed when 
young: lamellae adnate, subcrowded, white: stipe filiform, equal, smooth, subglabrous, white, 
mycelioid at the base, 1-1.5 cm. long, less than 1 mm. thick. 
Type collected on decayed sticks in a moist virgin forest along the Tepeite River, near Cuer- 
navaca, Mexico, 2100 m. elevation, December 28, 1909, W. A. & Edna L. Murrill 473 (herb. N. ¥- 
Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
91. Prunulus trojanus Murrill, sp. nov. 
Pileus broadly convex, slightly umbonate, becoming depressed at the center, cespitose, 
*1.5-2 em. broad; surface smooth, dry, glabrous, white or whitish, becoming striate over the 
lamellae on drying, margin entire, concolorous, appressed when young: lamellae adnate, 
slightly decurrent at times, inserted, rather distant, broad, white: spores globose, smooth, 
hyaline, 5—7 u: stipe equal, smooth, glabrous, white, 3 cm. long, 2 mm. thick. 
Type collected on decayed wood in Troy and Tyre, Cockpit Country, Jamaica, 600 m. elevation, 
January 12-14, 1909, W. A. Murrill & W. Harris 866 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
92. Prunulus roridulus (Berk. & Curt.) Murrill. 
Agaricus (Mycena) roridulus Berk. & Curt. Jour. Linn. Soc. 10: 285, 1868. 
Mycena roridula Sacc. Syll, Fung. 5: 297. 1887. 
Pileus thin, convex to plane, 6 mm. broad; surface white, fuscous on the umbo, viscid: 
lamellae adnate, broad, puberulent, white, the interstices subtrabeculate: stipe equal, glabrous, 
subfuscous, hollow, 2.5 em. long, 1 mm. thick. 
TYPE Locality: Cuba. 
Hasirat: On rotten wood. . 
DISTRIBUTION: Known only from the type locality. 
