Rydberg's poison-ivy
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Sapindales
- family: Anacardiaceae
- genus: Toxicodendron
- species: Toxicodendron rydbergii
Berkley
Castle Pines
Castle Pines North
Ken Caryl
ColoradoGlencoe
IllinoisHelena
MontanaBend
Canyon City
Pendleton
Oregon
United States