Described based on collections from Washington and Oregon, USA (Bas 1969).
Amanita smithiana is a common and widespread species in western North America.
Population appears stable, and occurs over a wide range, and no decline has been noted. I recommend it should be listed as Least Concern (LC).
Pacific Northwest of North America, from southern British Columbia, Canada, south from coast to Cascade Range, through the Sierra Nevada, California, and coastally into Santa Cruz, County, California, USA. Also expected in the northern Rocky Mountains. Reported from single collection from Idaho, New Mexico and Mexico (Tulloss 2021); these collections should scrutinized more.
Population is widespread, and locally common in the Pacific Northwest and northern California. No decline has been noted.
Population Trend: Stable
Ectomycorrhizal with conifers, especially Douglas-fir (Pseudotsuga menziesii), and possibly with Tanoak (Notholithocarpus densiflorus) in California. Fruiting in fall.
No specific threats have been identified with regards to this species.
No specific conservation actions is needed with regards to this species.
Genetically compare Rocky Mountain collections with ones from the Pacific States.
None known. This species is toxic.
Bas, C. 1969. Morphology and Subdivision of Amanita and a Mongraph of its Section Lepidella. Persoonia 5: 285-579.
Mushroom Observer. 2021. http://www.mushroomobserver.org
Siegel, N. and Schwarz, C. 2016. Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.
Thiers, H. D. 1982. The Agaricales (Gilled Fungi) of California. 1. Amanitaceae. Mad River Press: Eureka, CA. 53 p.
Tulloss, R.E. and Lindgren, J.E. 2021. Amanita smithiana. in Tulloss, R.E. and Yang, Z.L. eds. Amanitaceae studies. [ http://www.amanitaceae.org?Amanita+smithiana ]. accessed February 3, 2021.