E-Flora BC: Electronic Atlas of the Flora of British Columbia

Amanita silvicola
western woodland amanita

Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.

Introduction to the Macrofungi

© Michael Beug  Email the photographer   (Photo ID #15303)

E-Flora BC Static Map
Distribution of Amanita silvicola
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Subgenus Lepidella. Features are white color; stout stature for an Amanita; white, powdery or cottony patches on the cap (unless washed off by rain); enlarged stem base; and mild to soapy to fishy odor. Amanita silvicola is common in the Pacific Northwest.

It is reported specifically for BC (in Redhead(5)), for WA by O''Dell(1), and for CA by Arora(1). Collections from OR are at Oregon State University.
5-12cm across, convex to flat; white (occasionally discolored when old); "covered with flattened cottony or fluffy-powdery patches" of universal veil tissue rather than warts, "dry or slightly viscid when moist", non-striate, often hanging margin remnants present and margin often extends past gills, (Arora), margin often incurved (Phillips)
white (Arora), quite thick (Phillips)
adnate to adnexed or free, close; white; "edges finely powdery or cottony", (Arora)
5-12cm x 1.5-2.5cm, usually rather stout, with basal bulb up to 5cm; stem white sometimes with brown stains; powdery or with cottony scales, (Arora), 6-10cm x 1-2.5cm, solid, narrows slightly downward at the top, rarely rooting, (Phillips), VOLVA universal veil "cottony, white, forming a scaly or indistinct volva consisting of cottony white zones or patches at base of stalk which often disintegrate or remain in the ground", (Arora), fragile, white, "clinging to bulb in fragments and breaking up into circular zones but often adhering to the earth", (Goetz, D.)
partial veil "white, delicate, forming a slight ring or fibrillose zone or disappearing", (Arora)
mild or slightly soapy (Arora), fishy when old (Lindgren)
not distinctive (Lindgren)
Microscopic spores:
spores 8-12 x 4.5-6 microns, elliptic, smooth, amyloid, (Arora)
Spore deposit:
white (Arora)

Habitat / Range

single or in small groups in coniferous or mixed woods, (Arora), especially under Douglas fir; fruiting September to October, (Phillips), fall

Taxonomic and Nomenclatural Links

Additional Range and Status Information Links


unknown, do not eat, especially because of resemblance to poisonous Amanita smithiana

Additional Photo Sources

Related Databases

Species References

Arora(1), Lindgren(1), Goetz, D.(1), Phillips(1)*, Lincoff(2)*, Ammirati(1)*, McKnight(1)*, Trudell(4)*, Redhead(5), O''Dell(1), Siegel(2)*

References for the fungi

General References