June 1, 1806, at Camp Chopunnish, Idaho County, Idaho.
A member of the evening-primrose family (family Onagraceae). Flowers usually radially symmetrical, sepals usually 4, mostly separate; petals 4, mostly separate, both series united into a long, short, or barely discernible tube at the base; stamens usually 4 or 8.
The family of about 17 genera and 675 species is found worldwide, but is especially abundant in temperate regions of the New World.
