Cap 2.5-5.5 cm broad, convex, becoming plano-convex; surface viscid, cap margin buff to clay colored, disk darker to dull reddish brown; margin often with veil remnants; flesh white, thicker at the disk; odor of radish.
Gills broad, finely serrate; white becoming dull brown; cystidia present on gill edges; lamellulae present.
Stipe 3-7 cm long, 3-8 mm thick, pallid to dull brown, fibrillose; usually with cobwebby veil remnants.
Spores 8.7-10.3 X 5.6-6 µm, minutely ornamented; spore print brown.
Scattered to gregarious under conifers; winter.
Hebeloma mesophaeum is one of many small, dull colored Hebelomas with a cobwebby veil. Several occur in our area, but are more common in montane California. They could be confused with Cortinarius, but lack the rusty-brown spore print of Cortinarius.