North American species of Mycena.

GLUTINIPES: VISCOSAE

423

seems to be the only difference between them and European material.
M. splendidipes Peck is described as having yellow in the cap but is
otherwise similar to M. viscosa as described by Kiihner. In such a
group as this, in which yellow, green, and gray colors occur in mixed
and confusing proportions, I hesitate to use a single color variation
as a specific character.
216. MYCENA VISCOSA var. iodiolens, var. nov.
Aetate marcescens valde odorata, odore iodoformi similis; pileus
1-3 cm. latus, obtuse conicus vel campanulatus, glaber, viscidus,
striatus, cinereus, rufo-maculosus; lamellae subdistantes, pallidae,
angustae; stipes 5-9 cm. longus, 2-3 mm. crassus, flavidus; sporae
8-10 X 4.5-5.5 L. Specimen typicum in Herb. Univ. Mich. conservatum. Legit A. H. Smith, n. 18205, prope Detroit, Ore., 1941.
Pileus 1-3 cm. broad, obtusely conic, becoming obtusely umbonate
to nearly plane, glabrous, viscid, striate, pale gray to dark gray with
hardly a tinge of yellow, in age very pale cinereous and spottedreddish, striate, becoming sulcate-striate; flesh tenacious, thin, taste
and odor disagreeable and subfarinaceous when first collected, within
an hour the odor changing and becoming very strong and reminding
one of iodoform; lamellae subdistant, ascending, hooked, pallid, narrow; stipe 5-9 cm. long, 2-3 mm. thick, glutinous, pliant, bright pale
yellow, base strigose.
Spores 8-10 X 4.5-5.5 A, narrowly ellipsoid, smooth, weakly
amyloid; basidia four-spored; cheilocystidia subgelatinous and causing the gill edges to enlarge somewhat in KOH, filamentous, 30-60 X
4-6 u, covered with short rodlike projections; no pleurocystidia; pileus
trama with a very thick gelatinous pellicle; pileus and gill trama
faintly vinaceous in iodine.
Habit, habitat, and distribution.-Gregarious under cedar and
alder; Santiam River near Detroit, Oregon. Known only from the
type locality.
Observations.-This variety is distinguished from other members
of the group by the tardily developing odor of iodoform and the
narrower spores, and apparently by the slender cheilocystidia. Since
the differences in the last two characters are slight, the fungus has been
given only varietal rank.