Summary:
Hebeloma colvini needs to be confirmed for the Pacific Northwest. Features include a grayish or light tan cap that is viscid and bald, adnexed, close to crowded, broad, whitish gills that become brownish ochraceous, a whitish silky-fibrillose stem, a mild taste, growth on sandy soil in open places, and microscopic characters including two types of cheilocystidia and apparently absent clamp connections. This is not to be confused with Hebeloma calvini Hesler and A.H. Sm. which was named after Calvin Kauffman.

Gills:
adnexed, sinuate, close, broad according to the Peck description but Kauffman''s Michigan specimen had narrow gills; whitish becoming brownish ochraceous, (Kauffman), adnexed, crowded, broad; whitish at first, (Smith)

Stem:
2-8cm x 0.2-0.6cm, equal, flexuous [wavy], stuffed or hollow in upper part, solid in lower part; whitish; silky-fibrillose, the mycelium binding sand into globose mass adhering to base of stem, (Kauffman), 2.5-8cm x 0.2-0.6cm, flexuous [wavy]; whitish; silky-fibrillose, (Smith)

Taste:
mild (Smith)

Microscopic spores:
spores 10-12 x 5-6 microns, elliptic, (Kauffman), spores 10-15 x 6-8.5 microns; cheilocystidia of 2 types: 30-45 x 8-10 microns, cylindric to clavate, and 36-44 x 10-18 microns, broadly clavate to utriform; clamp connections apparently absent, (Smith)

Spore deposit:
[presumably brownish]

Notes:
Hebeloma colvini was reported by Davidson(1) in 1930 for BC. There is a 1926 collection from BC by F. Dickson at the University of British Columbia. It has been reported also from NY and the Great Lakes area but rarely collected, (Smith(6)).

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