May 190(5] North American Species of Heliomyces 
93 
ance remarkably in drying. No doubt some tropical species of 
Mycena and Marasmius described from the dried specimens be¬ 
long properly in Heliomyces. 
A. STIPE GLABROUS. 
a. Pileus colored from the first. 
1. HELIOMYCES BERTOROI Le'ville Champ, exot. 
i8 44 - ... 
Pileus discoid; umbilicate, naked, radiate-sulcate, ferruginous. 
Stipe slender, somewhat woody, naked, cylindric, ferruginous- 
purpurascent. 
Crowing upon the bark of trees in Porto Rico. The plant is 
4 cm. in height. 
2. HELIOMYCES FOETENS Patouillard, Journ. 
Bot. 1889. 
Ill-smelling; fascicular. Pileus thin, membranaceous, gla¬ 
brous, rufous, the center umbonate, the margin pellucid and torn. 
Stipe slender, rigid, glabrous, the apex thickened, slightly striate. 
Lamellae numerous, very thin, equal, adnexed; spores ovoid, hya¬ 
line, 6x4 mic. 
Growing on rotten wood of Prunus occidentalis upon the 
island of Martinique. Pileus 1.5-3 cm - i n diameter, the stipe 6-8 
cm. long and 1-2 mm. thick. 
b. Pileus at first white. 
3. HELIOMYCES PLUMIERII Le'ville Champ, exot. 
1844. “Fungus crenatus tenuissimus niveus.” Plumier, Traite 
des Fougeres, 1705. 
Pileus expanded, thin, striate, white, the margin crenate- 
dentate. Stipe cylindric, bulbillose at the base. Lamellae thin, 
serrulate. 
Growing in the West Indies. Pileus 4-5 cm. in diameter, the 
stipe 9-10 cm. long and 4-5 mm. thick. A doubtful species. 
4. HELIOMYCES DECOLORANS B. & C. Ann. & 
Mag. N. H. 1859. 
Pileus glabrous, rugose, sulcate, white. Stipe rigid, shining 
white. Lamellae broad, decurrent, white, the interstices wrinkled. 
Growing on dead wood, Alabama. Pileus 2-3 cm. in diam¬ 
eter, the stipe 5 cm. in height. The whole plant is at first white, 
in drying it changes color to rufous or tanny-brown. 
B. STIPE PRUINOSE. 
5. HELIOMYCES NIGRIPES Morgan. Agaricus ni- 
gripes Schweinitz, Syn. Car. 1822. Marasmius nigripes Fries, 
Epicrisis, 1838. 
Tremelloid. Pileus very thin, pure white, pruinose, rugulose- 
