The Status of Native Seed Sources in the Western San Joaquin Valley (California)
- N.P Ritter, P.A. Kelly, and S.E. Phillips
Five species (3.3%) had a OBL designation : Cordylanthus palmatus, Heliotropium curassavicum, Lepidium dictyotum, Salicornia subterminalis, and Spergularia marina.