Summary:
Features include 1) a viscid cap that is greenish yellow (with an often brownish-tinged disc and scattered fibrils and scales), 2) notched, close, white gills, 3) a white stem that is sometimes pale yellow in places, 4) a farinaceous odor and taste, 5) a white spore deposit, and 6) elliptic, smooth, inamyloid spores. The description derived from Ovrebo(1) is for Tricholoma leucophyllum Ovrebo & Tylutki. Peck''s original description of Tricholoma intermedium is also given. Shanks describes T. intermedium Peck, giving Tricholoma leucophyllum Ovrebo and Tylutki as a synonym. This view is followed by Bessette(5) but they note that not all mycologists agree with the synonymy. The online Species Fungorum, accessed May 3, 2016, maintains them separately.

Cap:
3.5-10cm across, convex, often with rounded or subacute umbo; yellowish tan to olive-tan over the disc, elsewhere light yellow, often fading when old; viscid becoming dry, bald or minutely areolate-squamulose over disc, elsewhere bald and often with scattered minute squamules [fine scales] or appressed fibrils, (Shanks, who also characterizes the cap as "viscid greenish yellow"), 4-10cm across, yellow, disc often brownish; bald with occasional tufts of fibrils, "viscid when moist and fresh, soon dry", (Ovrebo)

Flesh:
white in cap and stem, (Shanks), firm; white, sometimes appearing water-soaked, (Ovrebo)

Gills:
sinuate to broadly sinuate, close, 0.2-0.8cm broad; white, (Shanks), sinuate to uncinate, close, many tiers of subgills; white, edges not discoloring; edges often eroded, (Ovrebo), "crowded, free or slightly adnexed, white", (Peck)

Stem:
3.5-9 x 0.7-1.9cm, equal or rarely subclavate [somewhat club-shaped] or obclavate [reverse club-shaped], the base rounded, stem solid; "white overall or occasionally very pale yellow in places"; silky fibrillose and with superficial fibrils projecting, often lightly pruinose or scabrous at top, (Shanks), 3-9cm x 1-2.5cm, solid, becoming hollow; white, sometimes yellowish in lower part; bald to appressed silky-fibrillose, (Ovrebo), silky-hairy, often with a slight bloom at top, (Phillips), 2.5-5.1cm long, 3 to 5 lines wide [the line being a vaguely defined unit between 0.21 and 0.23 mm], "equal, firm, glabrous, white", (Peck)

Odor:
farinaceous (Shanks, Ovrebo)

Taste:
farinaceous (Shanks, Ovrebo)

Microscopic spores:
spores 5.3-9.6 x 3.4-5.8 microns, (holotype 4.8-6.2 x 2.9-4.3 microns, Sierra Nevada specimens 6.2-9.6 x 3.4-5.8 microns), elliptic, smooth, inamyloid, colorless; basidia 4-spored, 26-36 x 5.3-7.2 microns, clavate; cheilocystidia rare to abundant, 19-29 x 6.7-9.5 microns, "filiform, cylindric, clavate, saccate, ventricose, or sphaeropedunculate", colorless, thin-walled, smooth; cap cuticle an ixocutis, hyphae 2.4-7.2 microns, colorless or with pinkish brown refractive contents, smooth or with colorless, flare-like encrustations; clamp connections absent, (Shanks), spores 5.3-6.8 x 3.8-4.5 microns, elliptic in face view, elliptic to bean-shaped in side view, smooth, inamyloid, colorless, with droplets; basidia 28.5-34 x 5.3-7.5 microns, clavate, colorless, with droplets; cystidia absent; clamp connections absent, (Ovrebo), spores 5.1 x 4.1 microns, broadly elliptic, (Peck)

Spore deposit:
white (Ovrebo)

Notes:
Tricholoma intermedium has been found at least in ID (Ovrebo), CA (Shanks), and northeastern North America (Bessette(2)), including WV (Bessette(5)). It was reported from AB by Schalkwijk-Barendsen who calls it a Pacific Northwest species. Bessette(5) say it is widely distributed across northern N. America, extending south along the West Coast to CA. There is a collection from BC at Pacific Forestry Centre (as T. leucophyllum), and eleven collections from BC at the University of British Columbia (4 as T. intermedium and 7 as T. leucophyllum). There are two collections from ID at the University of Washington (1 as T. intermedium and 1 as T. leucophyllum). It was reported from WA by Andrew Parker, pers. comm.

EDIBILITY

unknown (Phillips)

Synonyms and Alternate Names:
Tricholoma leucophyllum Ovrebo & Tylutki