Summary:
Features include small size, a lavender to mauve cap, close to crowded lilac-tinted gills, a stem with long coarse hairs at base, growth on rotten wood, white spore deposit, and small amyloid spores. It is uncommon in the Pacific Northwest.

Cap:
0.9-2.5cm across, convex when young, flat-convex or flat with a shallow central depression when old, "rarely with a small, obtuse, central papilla", margin even, incurved, becoming decurved [downcurved], wavy or lobed, rarely short-striate; hygrophanous, disc grayish purple to dull violet when young, violet-brown or grayish brown when old, margin pale grayish purple when young, light brown when old; bald, dull, moist, disc smooth, (Desjardin), 1.5-2.5cm across, convex then flat, "sometimes shallowly umbilicate or mammillate", margin remaining somewhat inrolled; hygrophanous, dark warm brown when moist, drying much lighter, honey brown, "generally with a purplish tinge toward the margin when moist"; dull, minutely rugose [wrinkled], "faintly floccose, especially toward margin", (Lennox); 1-4cm across, convex becoming flat or sometimes sunken in center, with incurved margin becoming wavy and uplifted when old; "lavender or brownish mauve", becoming more dingy yellowish brown or pale buff when old; "smooth, moist", (Phillips), usually brownish, occasionally with lilac tones, (Trudell)

Flesh:
less than 0.1cm thick, violaceous-buff, (Desjardin), very thin, "tough-pliant, more brittle in drying"; pale lilac when moist, then pallid, (Lennox), "tough; grayish", (Phillips)

Gills:
adnate or slightly adnexed, extremely crowded, subgills in 3-5 series, gills narrow; grayish purple or dull violet when young, becoming paler when old, (Desjardin), adnate to uncinate, very thin and crowded, linear, narrow; brick to dark purple, drying darker and with a fuscous tone, edges colored as faces; edges even, (Lennox), "adnate or nearly free, close to crowded, narrow; similar color to cap", (Phillips), 43-55 gills reaching stem, (5)7-12 subgills between each pair of gills, "occasionally forked toward the margin", (Breitenbach)

Stem:
2-5.5cm x 0.15-0.4cm, equal, round in cross-section or compressed and cleft, pliant, hollow, not insititious; top pale reddish gray when young, grayish purple when old, base grayish purple or dull violet when young, grayish brown or brown when old; top minutely pruinose, glabrescent [becoming bald], base pubescent [downy] or tomentose, the tomentum white or pale lavender, (Desjardin); 2.5-5.5cm x 0.1-0.25cm, equal most of length, usually somewhat expanded at base and top, round in cross-section or compressed-furrowed, hollow, stuffed, "tough, fibrous, not pliant"; lilac at top, "becoming brown to reddish brown downward or in drying"; "pruinose for the entire length, densely so at base, then almost matted, darker under the covering, lighter in drying specimens", (Lennox), 1-5cm x 0.1-0.3cm, "stuffed to hollow, pliant, tough; similar color to cap; dry, often grooved becoming smooth", with long, coarse hairs at base, (Phillips), usually brownish, occasionally with lilac tones, (Trudell)

Odor:
strongly fungal (Desjardin), faint and fungoid (Lennox)

Taste:
mild (Desjardin), faint and fungoid (Lennox)

Microscopic spores:
spores 2.7-4.2(4.5) x 2.1-3 microns, nearly round or elliptic, weakly amyloid; basidia 4-spored, 15-17.4 x 3.6-4.5 microns, clavate; pleurocystidia abundant near gill edge, scattered elsewhere, similar to cheilocystidia, cheilocystidia abundant, 16.8-27 x 4.2-7.2 microns, projecting 5-13.2 microns, broadly clavate or ventricose, colorless or pale yellow, inamyloid, thin-walled; basidia, basidioles, and cystidia "with thick, globular, brown, weakly dextrinoid pigment incrustations appressed to the basal portion of the cells", (Desjardin), spores 2.5-4.0 x (1.5)2-3 microns, ovate to almost elliptic, smooth, amyloid, thin-walled; basidia 4-spored, small, 14-15 x 3-4.5 microns, cylindric, heavily encrusted "with a weakly dextrinoid amorphous substance, seeming to cement the cells together at the base"; pleurocystidia as cheilocystidia but scattered, more abundant toward gill edge, cheilocystidia abundant, relatively small, 18-28 x 3-7 microns, "clavate, ventricose, apex obtuse and nipple-like or broadly rounded, thin-walled", colorless, (Lennox), spores 3.5-4.5 x 2-3 microns, elliptic, smooth, amyloid, (Phillips), clamps mentioned for basidia, (Breitenbach)

Spore deposit:
white (Lennox, Phillips)

Notes:
It has been found at least in BC (Redhead) and WA (Lennox). Collections were studied from WA, AK, and MI, (Wells, V.L.).

EDIBILITY

no (Phillips)

Synonyms and Alternate Names:
Collybia lilacea Quel.
Collybia myriadophylla (Peck) Sacc.
Collybia teleoianthina Metrod