LA Native Plant Source propagates plants native to the Los Angeles area for its own Southern Oak Woodland garden as well as offering them for sale to the local California native gardening community. All proceeds support the Theodore Payne Foundation.

Idyllic scene with craftsman house, live oak tree, and planters
Craftsman house and live oak

From the blog

Cultivar Mentality

Given the growing number and popularity of native cultivars, a conscientious native gardener might be forgiven for asking: what is the larger environmental impact of cloning an individual plant on an industrial scale, ad infinitum? Globally speaking, is it a good thing or a bad thing?