threadleaf groundsel
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Asterales
- family: Asteraceae
- genus: Senecio
- species: Senecio flaccidus
Tlahualilo de Zaragoza
Durango- Altar
- Magdalena de Kino
Sonora- Víctor Rosales
Zacatecas
Mexico
Baldwin Park- Mayflower Village
- Palmdale
California- Cañon City
- Denver
- Florence
- Lincoln Park
Colorado- Clayton
New Mexico- Alpine
Texas
United States