Jan. 1906 ] North American Species of Marasmius 
5 
141. MARASMIUS LEUCOCEPHALUS Mont. Syll. 
Crypt. 1856. 
Pileus membranaceous, convex then plane and depressed, at 
length infundibuliform, glabrous, white. Stipe cartilaginous, 
stuffed then hollow, pallid above, brownish below, villous- 
pruinose with pale tawny flocci, attached by a discoid base. 
Lamellae unequal, white, narrow in front and obtuse, broader 
behind, sinuate-adnate and long decurrent. 
Growing on fallen sticks. Pileus 6-15 mm. in diameter, the 
stipe 2-3 cm. long. 
142. MARASMIUS SEMISPARSUS Berkeley, Chall. 
Exp. 1875. 
Pileus depressed, umber, gray-pulverulent, the margin naked 
and sulcate. Stipe umber, minutely tomentose, the base some¬ 
what spongy. Lamellae distant, adnate-decurrent, concolorous. 
Growing on the petiole of a dead leaf; Bermuda. Pileus 
about 4 mm. in diameter, the stipe 12 mm. long, twisted and 
compressed when dry. 
143. MARASMIUS TOMENTOSIPES Peck, Bull. 
Torr. 1902. 
Pileus thin, convex, afterward nearly plane, usually umbili- 
cate, glabrous, the margin striate, yellow-brown or ferruginous, 
brown when dry. Stipe slender, hard, elastic, hollow, brown or 
black, tomentose. Lamellae narrow, rather distant, unequal, 
arcuate-decurrent, pale-yellow; spores elliptic, 6 - 7 X 3-4 mic. 
Growing in coniferous woods; Idaho. Pileus 1-3.5 cm. m 
diameter, the stipe 2-4 cm. long and 1 mm. thick. 
II. CLAVIFORMES. Pileus membranaceous , campanu- 
late or convex , never depressed . 
A. STIPE GLABROUS. 
144. MARASMIUS ALBO-FUSCUS B. & C. Fungi 
Cub. ioi. 
Pileus plane, umbonate, thin, striate, reticulate, white, the 
center brown. Stipe solid, glabrous, slender, slightly thickened 
above. Lamellae few, distant, broad, adnate-decurrent, the inter¬ 
stices trabeculate. 
Growing on logs in woods. Pileus 12 mm. in diameter, the 
stipe 2-3 cm. long. 
145. MARASMIUS ALBICEPS Peck, 43 N. Y. Rep. 
1889. 
Pileus membranaceous, either convex or campanulate, gla¬ 
brous, white. Stipe corneous, setiform, glabrous, black, paler 
at the apex, attached to the matrix by radiating brown hairs or 
fibers. Lamellae broad, distant, adnate- or arcuate-decurrent, 
white; spores obovoid or subelliptic, 6-8X3-4 mic. usually con¬ 
taining a shining guttule. 
