Amanita phalloides  (Vaill. ex Fr.) Link (1833)                                     *All collections from California

Amanita phalloides is probably the deadliest macromycete and the one everyone should learn to recognize first. Believed to be non-native to California and the Pacific Northwest, Amanita phalloides has achieved a tremendously fast paced expansion. Evidence suggests that the species  was introduced along multiple points of insertion in the last 100 years via imported Oak trees. Some specimens that were examined molecularly have been linked directly to European populations.

Amanita phalloides is spreading under Tanoak too.