Amanita smithiana

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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
View the Mycomorphbox template that generates the following list
Mycological characteristics
gills on hymenium
cap is convex
hymenium is free
stipe has a ring and volva
spore print is white
ecology is mycorrhizal
edibility: poisonous

Amanita smithiana, also known as Smith's amanita, 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. The cap has a diameter of 5–17 cm (2–7 in) and is white and scaled with remnants of the universal veil. The stipe is 6–18 cm (2–7 in) and white and similarly scaled, with a ring.

It is responsible for poisonings in the Pacific Northwest when mistaken for the edible and sought after Tricholoma magnivelare. It causes initial gastrointestinal symptoms, followed by acute renal failure after a delay of 2–6 days. This is often severe, requiring hemodialysis, but most patients recover normal kidney function within several weeks.[1]

Amanita smithiana was described by Dutch mycologist Cornelis Bas in 1969.[2] It belongs in the subgenus Lepidella. Two similar species have been implicated in similar cases of acute renal failure, A. proxima in Spain and A. pseudoporphyria in Japan.

See also[edit]


  1. ^ Saviuc P, Danel V. (2006). "New Syndromes in Mushroom Poisoning". Toxicological Reviews 25 (3): 199–209. doi:10.2165/00139709-200625030-00004. PMID 17192123. 
  2. ^ Bas C. (1969). "Morphology and subdivision of Amanita and a monograph of its section Lepidella". Persoonia 5 (3): 285–579 (see p. 418).