Quick answer: 4 monarch host plants are native to Oklahoma, 4 with a live listing as of 24 Oct 2026.
4 species
- Butterflyweed Asclepias tuberosa · 40 states
- Showy milkweed Asclepias speciosa · 17 states
- Swamp milkweed Asclepias incarnata · 37 states
- Whorled milkweed Asclepias verticillata · 30 states