August 22, 2020 Asclepias californica California Milkweed California milkweed (Asclepias californica) seeds germinating.California milkweed (Asclepias californica) seed pods splitting open and spilling seeds. Photo by Hillary Sardiñas. More InformationCalifornia Milkweed at Native Here NurseryPartners Work to Help Monarch Butterflies by Expanding a Locally Scarce Milkweed Species