Quick answer: 5 native plants for wet soil and rain gardens are native to California, 4 with a live listing as of 15 Sep 2026.
5 species
- Cardinal flower Lobelia cardinalis · 37 states
- Common elderberry Sambucus nigra ssp. canadensis · 16 states
- Desert marigold Baileya multiradiata · 4 states
- Pacific trillium Trillium ovatum · 3 states
- Rocky Mountain iris Iris missouriensis · 7 states