Laccaria amethysteo-occidentalis is a mushroom found under conifers, usually pine, growing alone, scattered or gregariously in western North America.

[1] Spores are 7.5–10.5 x 7–16 μm, subglobose or broadly elliptical.

This species is similar to L. amethystina but differs by occurring than hard wood forest and in Eastern North America, rather than conifers forest; having a smaller sporocarp; and being a lighter purple color.

[citation needed] L. bicolor is smaller and less purplish; L. laccata has whitish mycelium at its base.

[5] Cortinarius violaceus is darker and has a less fibrillose stipe.