| Species | Common Name |
|---|---|
| Apocynum androsaemifolium | dogbane |
| Apocynum cannabinum | Indian-hemp |
| Asclepias californica | California milkweed |
| Asclepias cordifolia | purple milkweed |
| Asclepias fascicularis | narrow-leaf milkweed |
| Asclepias speciosa | milkweed |
| Vinca major | greater periwinkle |