| Rhamnaceae | |
Rhamnus californica var. betulifolia
| Trel. ex A. Gray | Syn. Fl. N. Amer. 1(1): 408 | 1897 |
| Rhamnaceae | |
Rhamnus californica subsp. californica
| | | |
| Rhamnaceae | |
Rhamnus californica subsp. crassifolia
| (Jeps.) C.B. Wolf | Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser. 1: 68–69 | 1938 |
| Rhamnaceae | |
Rhamnus californica var. crassifolia
| Jeps. | Man. Fl. Pl. Calif. 615 | 1925 |
| Rhamnaceae | |
Rhamnus californica subsp. cuspidata
| (Greene) C.B. Wolf | Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser. 1: 72 | 1938 |
| Rhamnaceae | |
Rhamnus californica var. obtusissima
| (Greene) Jeps. | Man. Fl. Pl. Calif. 615 | 1925 |
| Rhamnaceae | |
Rhamnus californica subsp. occidentalis
| (Howell ex Greene) C.B. Wolf | Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser. 1: 66 | 1938 |
| Rhamnaceae | |
Rhamnus californica var. occidentalis
| (Howell ex Greene) Jeps. | Man. Fl. Pl. Calif. 615 | 1925 |
| Rhamnaceae | |
Rhamnus californica subsp. tomentella
| (Benth.) C.B. Wolf | Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser. 1: 70 | 1938 |
| Rhamnaceae | |
Rhamnus californica var. tomentella
| (Benth.) W.H. Brewer & S. Watson | Bot. California 1: 101 | 1876 |
| Rhamnaceae | |
Rhamnus californica subsp. ursina
| (Greene) C.B. Wolf | Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser. 1: 74 | 1938 |
| Rhamnaceae | |
Rhamnus californica var. ursina
| (Greene) McMinn | Man. Calif. Shrubs 329 | 1939 |
| Rhamnaceae | |
Rhamnus californica var. viridula
| Jeps. | Man. Fl. Pl. Calif. 615 | 1925 |