Laccaria laccata

The deceiver was first described by Tyrolian naturalist Giovanni Antonio Scopoli in 1772 as Agaricus laccatus,[1] before being given its current binomial name by Mordecai Cubitt Cooke in 1884. The specific epithet is derived from the Latin adjective laccatus “varnished” or “shining”.[2] Clitocybe laccata is an old alternative name. Var. pallidifolia, described by Charles Horton Peck, is the most common variety found in North America.

It is the type species of the cosmopolitan mushroom genus Laccaria; where their relations lie among the gilled mushrooms is unclear, but they are currently classified in the family Hydnangiaceae.

The deceiver gets its common name from its variable appearance. Other names include lacklustre laccaria, and, by the Zapotec people, Beshia ladhi biinii (also the name of other members of Laccaria).[3]

The deceiver is a small mushroom with a cap up to 6 cm (2.5 in) in diameter, convex when young and later flattening or even depressed in the center. It can be various shades of salmon pink, brick-red, or shades of orange or brown when moist or young, and duller and paler when dry. The fibrous stipe is 5–10 cm (2–4 in) high and 0.6–1 cm (0–0.5 in) wide. The irregular gills are widely spaced and decurrent or adnexed, and of similar color to the cap, though whiten with spores as the mushroom matures. The spore print is white, and the round spiny spores are 7–10 μm in diameter. The flesh is thin and has little taste.[4]

Formerly considered a subspecies by French mycologist René Maire, the close deceiver (Laccaria proxima) is a European relative with a fine scaly cap and found in wetter habitats.[5] Microscopically, its spores are narrower and more oval-shaped.

In California, what was thought to be L. laccata under eucalyptus has turned out to be the Australian species Laccaria fraterna.[6]

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  Cap
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  Cap
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  Gills and stipe
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  Gills
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  L. laccata as Agaricus laccatus in Illustrations of British Fungi (Hymenomycetes), to serve as an atlas to the "Handbook of British Fungi".

Laccaria laccata is found in scattered troops in wooded areas, and on heathland often in poor soil. It is very common in all of the northern temperate zones, but tends to favor cool weather. L. laccata is mycorrhizal with several types of trees, including members of the Pinaceae (Pines), Fagaceae (Beech), and Betulaceae (Birch). It is found across Europe and North America,[7] south into Mexico and Costa Rica. Laccaria species are mycorrhizal, and thought by some to be pioneer species.

Although small, the deceiver is edible and mild-tasting.[8] It is one of many mushrooms traditionally eaten by the Zapotec people of Oaxaca in Mexico.[3] However, it is important to distinguish it from potentially lethal small brown mushrooms.[7]

Wikimedia Commons has media related to Laccaria laccata.

• Laccaria laccata var. laccata at the Field Museum of Natural History website