Plants that support Eastern Black Swallowtail
3 plants
California Larkspur
Delphinium californicum subsp. californicum
perennial herb
Spring and early summer nectar source
Bay Area native
Leopard Lily
Lilium pardalinum subsp. pardalinum
geophyte
Occasional use of lily species as larval host in California range
Bay Area native
Star lily
Toxicoscordion fremontii
perennial herb
Caterpillar host plant for multiple generations Mar-Sep
Bay Area native