The Theodore Payne Foundation for Wild Flowers and Native Plants — or TPF, is a private, non-profit organization founded in 1960 to promote the understanding and preservation of California native plants. It continues the work of Theodore Payne, an English horticulturist, gardener, landscape designer, and botanist.^[1]

The Foundation is located in Sun Valley, in the northeastern San Fernando Valley and western Verdugo Mountains foothills.^[1]

TPF operates a native plant nursery and education center focused on California natives.^[2] Programs include the propagation of a wide range of species and cultivars of the California flora for use in the home landscape; collection and process of seeds from the wild for use in propagation, and courses in the horticulture, botany, and ecology of California native plants for the general public, as well as a volunteer program.^[3] Educational programs for children include plant-animal relations, butterflies, and human uses of native plant materials. TPF K-12 education programs

Major events include an Annual Native Plant Garden Tour in the greater Los Angeles area, featuring gardens with at least 50 percent California native plants,^[4] the Wild Flower Hotline providing locations to view Spring wild flowers in California;^[5] and changing art gallery exhibits.

• List of California native plants
• Flora of California