Amanita smithiana
| Amanita smithiana | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Amanitaceae |
| Genus: | Amanita |
| Species: | A. smithiana
|
| Binomial name | |
| Amanita smithiana Bas (1969)
| |
Amanita smithiana | |
|---|---|
 | Gills on hymenium |
 | Cap is convex or flat |
 | Hymenium is free |
 | Stipe has a ring and volva |
 | Spore print is white |
 | Ecology is mycorrhizal |
 | Edibility is poisonous |
Amanita smithiana, also known as Smith's amanita,[2] is a species of agaric found on soil in coniferous (Abies, Tsuga, Pseudotsuga) and broadleaved (Alnus, Quercus) woodland in the Pacific Northwest of North America. It fruits in August and September.
Description
[edit]The cap has a diameter of 5–17 centimetres (2–6+1⁄2 inches) and is white and scaled with remnants of the universal veil. The stipe is 6–18 cm (2+1⁄2–7 in) long by 1–3.5 cm (1⁄2–1+1⁄2 in) thick, white and similarly scaled, with a ring.[3] The spores are ellipsoid to elongated, amyloid, and measure 11–12.5 by 7–8 μm.[4]
Taxonomy
[edit]Amanita smithiana was described by Dutch mycologist Cornelis Bas in 1969. The specific epithet honors mycologist Alexander H. Smith, who collected the type specimens from Washington in 1941.[4] It belongs in the subgenus Lepidella.
Toxicity
[edit] | This article may be confusing or unclear to readers. (May 2025) |
It is responsible for poisonings in the Pacific Northwest when mistaken for the edible and sought after Tricholoma murrillianum (matsutake). It causes initial gastrointestinal symptoms that manifest 1 to 12 hours after eating the mushrooms,[5] followed by acute nephritis after a delay of 2–6 days. Hemodialysis appears to be an effective treatment and most patients recover normal kidney function within several weeks of ingestion.[6]
It is thought that A. smithiana toxicity is from chlorocrotylglycine and allenic norleucine.[5]
Several similar species have been implicated in similar cases of poisoning: A. sphaerobulbosa, Saproamanita thiersii, A. proxima, (Spain) and A. pseudoporphyria (Japan).[3]
See also
[edit]
References
[edit]- ^ Siegel, N. (2021). "Amanita smithiana". IUCN Red List of Threatened Species. 2021: e.T198477559A198489594. doi:10.2305/IUCN.UK.2021-2.RLTS.T198477559A198489594.en. Retrieved 21 April 2025.
- ^ "Standardized Common Names for Wild Species in Canada". National General Status Working Group. 2020.
- ^ a b Tulloss RE. "Amanita smithiana". Amanitaceae.org. Retrieved 2014-05-06.
- ^ a b Bas C. (1969). "Morphology and subdivision of Amanita and a monograph of its section Lepidella". Persoonia. 5 (3): 285–579 (see p. 418).
- ^ a b Greenberg, Michael I. (2005). Greenberg's Text-atlas of Emergency Medicine. Lippincott Williams & Wilkins. p. 854. ISBN 978-0-7817-4586-4.
- ^ Saviuc P, Danel V. (2006). "New Syndromes in Mushroom Poisoning". Toxicological Reviews. 25 (3): 199–209. doi:10.2165/00139709-200625030-00004. PMID 17192123. S2CID 24320633.
External links
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