Dayia is a poorly known genus of two species apparently endemic to Baja California. The genus is named after Alva Day. Plants are generally sub-shrubs.
- Dayia grantii J.M. Porter
- Dayia scabra (Brandegee) J.M. Porter
KEY TO DAYIA
1. Filaments monomorphic, 13.5-17.6 mm long; corolla dark blue with a yellow throat…D. grantii
1. Filaments dimorphic, 3-4 and 6-7 mm long; corolla light blue with a white throat…D. scabra
Porter, J. M. and L. A. Johnson. 2000. A phylogenetic classification of Polemoniaceae. Aliso 19: 55-91.