Summary:
Features include 1) a smooth, lubricous to viscid, often umbonate cap that is white to cream with a yellowish brown center or yellowish patches, 2) thin, white flesh, 3) adnate to sinuate, pale grayish to pale violet-gray-brown gills, 4) a slender white stem with a fleeting superior ring, the stem yellow-cottony below the ring zone, 5) mild odor and taste, 6) growth in grassy meadows, 7) a violet-brown to purple-black spore deposit, and 8) elongate spores. It is rare in the Pacific Northwest.

Cap:
3-4(6)cm across, pure white, when old sometimes pale ochraceous at center; viscid, (Hansen), 2-6cm across, "convex, often umbonate; white to cream with yellowish center; smooth, viscid", (Phillips), 1.5-4cm across, almost hemispheric when young, later convex, soon flat with obtuse umbo, margin sharp; whitish when young, yellowing from center out when bruised and when old; "smooth, lubricous when moist, satiny when dry", margin smooth, (Breitenbach)

Flesh:
thin; white (Phillips, Breitenbach)

Gills:
pale grayish with violet tint (Hansen), "sinuate; pale violet-gray-brown", (Phillips), broadly adnate, 28-32 reaching stem, broad, 3-5 subgills between neighboring gills; gray-white when young, soon lilac-brown to violet-brown or gray-brown, edges white; edges floccose, (Breitenbach)

Stem:
3-8cm x 0.3-0.7cm, slender; white; "with a rather ephemeral, sometimes striate ring and a scurfy surface", (Hansen), 4-8cm x 0.3-0.5cm, white; yellow-floccose [yellow-cottony] below the superior ring zone, (Phillips), 3-7cm x 0.3-0.5cm, cylindric, "solid when young, hollow when old, rigid, fragile", white background; above the ring white to hyaline-white and finely white-punctate, below the ring finely yellow-fibrillose-floccose to light-ocher-fibrillose-floccose, rung "membranous, pendent, white", (Breitenbach), "white to yellowish near base, white floccose scaly below well developed white membranous ring", (Kroeger)

Veil:
forms ephemeral sometimes striate ring (Hansen), forms superior ring zone on stem (Phillips), forming ring on stem that is "membranous, pendent, white", (Breitenbach)

Odor:
not distinctive (Phillips), almost none, (Breitenbach)

Taste:
not distinctive (Phillips), mild, insipid, (Breitenbach)

Microscopic spores:
spores 7-9 x 4-5 microns, (Hansen), spores 8-9 x 4-5 microns, elliptic, (Phillips), spores 6.9-8.4 x 4.1-5.1 microns, elliptic - almond-shaped, "smooth, gray-brown, thick-walled, with an indistinct germ pore"; basidia 4-spored, 20-25 x 5.5-6.5 microns, cylindric-clavate, with basal clamp connection; pleurocystidia modified as chrysocystidia, not abundant, 35-45 x 10-12 microns, "fusiform-ventricose, usually with an apical protrusion", cheilocystidia 22-35 x 11-17 microns, "clavate, gnarled, flexuous"; cap cuticle "an ixocutis composed of fragments of periclinal hyphae" 2-4 microns wide, "colorless, all embedded in a gelatinous material", (Breitenbach)

Spore deposit:
purple-black (Phillips), violet-brown (Breitenbach)

Notes:
There are collections from BC and ID at the University of British Columbia. Breitenbach(4) gave the distribution as North America and Europe.

EDIBILITY

no (Phillips)