Part 5, 1916] AGARICACEAE 323 
4, Prunulus parvulus Murrill. 
Beats eo) minutulus Peck, Bull. Buffalo Soc. Nat. Sci. 1:47. 1873. Not A. minutulus 
ries, 
Mycena minutula Sacc. Syll. Fung. 5: 263. 1887. 
Pileus campanulate or convex, papillate, gregarious, 4-8 mm. broad; surface glabrous, 
smooth, white, margin striatulate: lamellae broad, subdistant, with a slight decurrent tooth, 
interveined, white: stipe short, thin, firm, glabrous or farinaceous, white, 1.5-2.5 cm. long. 
Type Locality: Portville, New York. 
HasitaT: On bark of prostrate trunks in woods. 
DIstTRIBUTION: Known only from the type locality. 
5. Prunulus radicatellus (Peck) Murrill. 
Agaricus (Mycena) radicatellus Peck, Ann. Rep. N. Y. State Mus. 31: 32. 1879. 
Mycena radicatella Sacc. Syll. Fung. 5: 275. 1887. 
Pileus thin, campanulate, obtuse or subumbonate, 8-12 mm. broad; surface glabrous, 
whitish, margin striate: lamellae crowded, narrow, ascending, white: spores subglobose, rough, 
8-10 uw: stipe firm, thin, deeply radicate, glabrous, whitish, 4—5 cm. long. 
TYPE LocaLity: Griffins, Delaware County, New York. 
HapitatT: On mossy ground in woods. 
DISTRIBUTION: Known only from the type locality. 
6. Prunulus delectabilis (Peck) Murrill. 
Agaricus (Mycena) delectabilis Peck, Ann. Rep. N. ¥. State Mus. 27: 93. 1875. 
Mycena delectabilis Sacc. Syll. Fung. 5: 262. 1887. 
Piletus conic, subacute, thin, 6-8 mm. broad; surface white, margin striate: context having 
an alkaline odor; lamellae arcuate-decurrent, crowded, white: stipe slender, equal, smooth, 
with hairy filaments at the base, 4 cm. long, 1 mm. thick. 
TYPE Locality: Forestburgh, New York. 
Hapitat: Among mosses in woods. 
DISTRIBUTION: Known only from the type locality. 
ILLUSTRATIONS: Ann. Rep. N. Y. State Mus. 27: pl. 1, f. 22-25. 
7. Prunulus roseocandidus (Peck) Murrill. 
Agaricus (Mycena) roseocandidus Peck, Bull. Buffalo Soc. Nat. Sci. 1: 47. 1873. 
Mycena roseocandida Sacc. Syll. Fung. 5: 262. 1887. 
Pileus convex or broadly campanulate, 8-12 mm. broad; surface usually pure-white, but 
sometimes having a delicate rosy hue, except on the margin, which is striate: lamellae crowded, 
uncinate, white or rosy: stipe thin, smooth, white, sometimes rose-tinted at the apex, glabrous, 
5 em. long. 
Tyrese LocaLtity: Adirondack Mountains, New York. 
Hasitat: Among mosses in woods. : 
DISTRIBUTION: Known only from the type locality. 
8. Prunulus cyaneobasis (Peck) Murrill. 
Agaricus (Mycena) subcoeruleus Peck, Bull. Buffalo Soc. Nat. Sci. 1:47. 1873. Not A. subcoeruleus 
With. 1792. : 
Mycena cyaneobasis Peck, Ann. Rep. N. Y. State Mus. 51: 284. 1898. 
Mycena cyanothrix Atk. Stud. Am. Fungi 98. 1900. 
Pileus thin, submembranous, conic or subcampanulate, cespitose, 6-15 mm. broad; 
surface glabrous, viscid and bright-blue when young, caesious or grayish with age, the center 
tinged with fuscous, margin faintly striate to the umbo: context at first having a taste like 
radishes, then becoming bitter; lamellae adnexed, crowded, narrow, white to grayish, fimbriate 
ou the edges: spores subglobose, smooth, hyaline, 6-8 u: stipe slender, firm but brittle, radicate, 
hollow, pruinose or pubescent-fibrillose, whitish or rosy-isabelline, with blue or green my- 
celium at the base, 4~—9 cm. long, 2 mm. thick. 
TyP# Locatity: North Elba, New York. 
Hazitat: On decaying trunks of beech, birch, Si possibly other deciduous trees. 
DISTRIBUTION: New York, New Jersey, and Ohi 
ILLUSTRATIONS: Ann. Rep. N. Y. State Mus. 31: pl. B, f. 1-7; Atk. Stud. Am. Fungi. f. 99. 
