Allium sanbornii is a North American species of wild onion known by the common name Sanborn's onion. It is native to northern California and southwestern Oregon. It grows in the serpentine soils of the southern Cascade Range and northern Sierra Nevada foothills. Varieties * Allium sanbornii var. congdonii Jeps. - from Nevada County to Mariposa County * Allium sanbornii var. sanbornii - from Shasta County to Mariposa County in California; Jackson + Josephine Counties in Oregon