Chinese yam
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Dioscoreales
- family: Dioscoreaceae
- genus: Dioscorea
- species: Dioscorea polystachya
Bono
Arkansas- Emporia
Kansas- Charlotte Hall
- Silver Spring
- Takoma Park
Maryland- Manhattan
New York- Arlington
- Woodbridge
Virginia- Washington, D. C.
Washington, D.C.
United States