Laccaria amethysteo-occidentalis
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| Laccaria amethysteo-occidentalis | |
|---|---|
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Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Hydnangiaceae |
| Genus: | Laccaria |
| Species: | L. amethysteo-occidentalis |
| Binomial name | |
| Laccaria amethysteo-occidentalis Mueller, 1984 | |
| Synonyms | |
|
Laccaria laccata var. amethysteo-occidentalis (Cooke) Rea Laccaria amethystea-occidentalis[1] | |
| Laccaria amethysteo-occidentalis | |
|---|---|
| Mycological characteristics | |
 | Gills on hymenium |
 | Cap is convex or depressed |
 | Hymenium is adnate or decurrent |
 | Stipe is bare |
 | Spore print is white |
 | Ecology is mycorrhizal |
 | Edibility is edible |
Laccaria amethysteo-occidentalis is a mushroom found under conifers, usually pine, growing alone, scattered or gregariously in western North America.[2]
Similar species
The mushroom is entirely purple.[3] The cap is 1–7 centimetres (1⁄2–2+3⁄4 in) in width;[4] broad, convex to flat, often depressed, occasionally becoming slightly translucent-striated when fading, finely fibrillose, hygrophanous, fading to violet; margin rolled inward, later becoming flat; context thin and lighter grayish purple in color.[2]
The gills are purple,[5] thick and distant.[2] The stem is up to 14 cm (5+1⁄2 in) long, fibrous, with a whitish mycelium near the base.[3]
The spores are 7.5–10.5 x 7–16 μm, subglobose or broadly elliptical. The spore print is white.[3]
Basidia are 34–56.5 × 9.7–14.7 μm, clavate, elongate, hyaline. Pleurocystidia absent. Cheilocystidia are 36.5–66.5 × 12–18.4 μm, subclavate to clavate, thin-walled, hyaline, often very abundant, extending well beyond basidia.[2]
This species is similar to L. amethystina[3] but differs by occurring in hardwood forest in eastern North America, rather than coniferous forest; having a smaller sporocarp; and being a lighter purple color.[6] L. bicolor is smaller and less purplish; L. laccata has whitish mycelium at its base.[7] Cortinarius violaceus is darker and has a less fibrillose stipe.[7] Pseudoomphalina cokeri is also similar.[3]
Distribution and habitat
It can be found on the ground near the North American West Coast from October to February.[3]
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