| Fabaceae | |
Lupinus microcarpus var. densiflorus
| (Benth.) Jeps. | Fl. Calif. 2(3): 279–280 | 1936 |
| Fabaceae | |
Lupinus microcarpus var. glareosus
| (Elmer) Riggins | Taxon 39(2): 340 | 1990 |
| Fabaceae | |
Lupinus microcarpus var. horizontalis
| (A. Heller) Jeps. | Fl. Calif. 2(3): 280 | 1936 |
| Fabaceae | |
Lupinus microcarpus var. microcarpus
| | | |
| Fabaceae | |
Lupinus microcarpus var. recurvatus
| (Meyen) Reiche | Anales Univ. Chile 97: 469 | 1897 |
| Fabaceae | |
Lupinus microcarpus var. ruber
| (A. Heller) C.P. Sm. | Bull. Torrey Bot. Club 45(1): 10 | 1918 |
| Fabaceae | |
Lupinus microcarpus var. scopulorum
| (C.P. Sm.) C.P. Sm. | Bull. Torrey Bot. Club 51(3): 100 | 1924 |