longleaf milkweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Gentianales
- family: Apocynaceae
- genus: Asclepias
- species: Asclepias longifolia
Katwijk aan den Rijn- Rijnsburg
South Holland
Netherlands
Cottonwood- Dauphin Island
- Theodore
Alabama- New Orleans
Louisiana
United States