Wart-stemmed lilac
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Rosales
- family: Rhamnaceae
- genus: Ceanothus
- species: Ceanothus verrucosus
El Sauzal
Baja California
MexicoKentfield
La Jolla
Ross
San Anselmo
San Rafael
California
United States