7O NEW YORK STATE MUSEUM 
8&9 by 3 pw; cystidia awl-shaped, 25-30 by 5 ; stipe equal, inserted, 
horny, fistulose, brown below, light above, pruinose or very 
slightly velvety, 2-5 cm long, 5—1.mm thick. 
Upon dead herbaceous stems, leaves, twigs etc. Common. 
30 Marasmius caricicola Kauff. 
North American Flora, v.9, pt 4, p.’277. 1915. 
Mich. Geol. Sur. Bul.. 191s. 
Pileus membranous, somewhat tough, pliant, convex-expended, 
obtuse, gregarious, 4-8 mm broad; surface broadly sulcate or 
alveolate, pruinose, pure white; lamellae thick, adnate, very dis- 
tant, rather broad, pure white; spores 15-18 by 6-6.5 mw; basidia 
2-spored or 4-spored; stipe very short, terete, equal, subglabrous, 
pure white, inserted by a naked base, 2 mm long, .7 mm thick. 
Upon-stems of sedges in marshes. Not yet reported from New 
York. It is not unlikely that it may yet be found within the State. 
It is easily overlooked because of its small size. 
31 Marasmius praeacutus Ellis 
Torrey Club Bul. 6, p.76. 1876. 
Pileus membranous, convex to expanded, subumbilicate, 6-10 
mm broad; surface pulverulent, white, the disk red-tinged; margin 
at first incurved, subsulcate, striate; lamellae adnate, more or less 
forked, hardly crowded, narrow, white; spores 5-6 by 3 p; stipe 
swollen below but contracted to a point at the base, hollow, reddish 
brown, white at the base, pulverulent, 2.5 cm long, 1 mm thick. In 
young plants, the swollen part of the stipe constitutes nearly the 
entire plant. 
Upon dead leaves, twigs, and bark in woods. Rare. 
The peculiar appearance of the young plants and the marked con- 
striction of the stipe at its base easily distinguish this species. 
32 Marasmius opacus Berk. & Curt. 
Jour. Bot. & Kew Misc., 1:99. 1849. 
_Pileus submembranous, convex, often slightly depressed around 
a central umbo,-5-8 mm broad; surface rugulose, scarcely striate, 
opaque, pulverulent, white; lamellae adnexed, distant, ventricose; 
spores 6-7 by 3m; stipe institious, elongate, pulverulent, subfur- 
furaceous, pallid, 2.5-4 cm long, 1 mm thick. 
