Calochortus weedii is a North American species of flowering plants in the lily family known by the common name Weed's mariposa lily.

It is native to the Outer Southern California Coast Ranges and the Transverse Ranges in Southern California, and the Peninsular Ranges in Southern California and Baja California. It is a member of the chaparral flora. Most of the California locales occur between Santa Barbara County and San Diego County, but there is a report of an isolated population along Salmon Creek in southern Monterey County.

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