Theodore Payne Foundation

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

Source: Wikipedia