| Fabaceae | |
Lupinus formosus var. bridgesii
| (S. Watson) Greene | Fl. Francisc. 1: 42 | 1891 |
| Fabaceae | |
Lupinus formosus var. clemensiae
| C.P. Sm. | Man. Fl. Pl. Calif. 529 | 1925 |
| Fabaceae | |
Lupinus formosus var. elatus
| (I.M. Johnst.) C.P. Sm. | Man. Fl. Pl. Calif. 529 | 1925 |
| Fabaceae | |
Lupinus formosus subsp. formosus
| | | |
| Fabaceae | |
Lupinus formosus var. formosus
| | | |
| Fabaceae | |
Lupinus formosus var. hyacinthinus
| (Greene) C.P. Sm. | Man. Fl. Pl. Calif. 529 | 1925 |
| Fabaceae | * |
Lupinus formosus var. proximus
| Conrad | | |
| Fabaceae | * |
Lupinus formosus subsp. robustus
| Greene | | |
| Fabaceae | |
Lupinus formosus var. robustus
| C.P. Sm. | Man. Fl. Pl. Calif. 529 | 1925 |