| Fabaceae | |
Lupinus sulphureus var. applegateianus
| C.P. Sm. | Sp. Lupinorum 7: 109 | 1939 |
| Fabaceae | |
Lupinus sulphureus var. bingenensis
| (Suksd.) Gandhi & Vincent | Phytoneuron 2019-41: 1–2 | 2019 |
| Fabaceae | |
Lupinus sulphureus subsp. delnortensis
| (Eastw.) L.Ll. Phillips | Res. Stud. State Coll. Wash. 23(3): 194 | 1955 |
| Fabaceae | |
Lupinus sulphureus var. echlerianus
| C.P. Sm. | Fl. SE. Washington 229 | 1937 |
| Fabaceae | |
Lupinus sulphureus subsp. kincaidii
| (C.P. Sm.) L.Ll. Phillips | Res. Stud. State Coll. Wash. 23(3): 193 | 1955 |
| Fabaceae | |
Lupinus sulphureus var. kincaidii
| (C.P. Sm.) C.L. Hitchc. | Vasc. Pl. Pacif. N.W. 3: 330 | 1961 |
| Fabaceae | |
Lupinus sulphureus subsp. subsaccatus
| (Suksd.) L.Ll. Phillips | Res. Stud. State Coll. Wash. 23(3): 193 | 1955 |
| Fabaceae | |
Lupinus sulphureus var. subsaccatus
| (Suksd.) C.L. Hitchc. | Vasc. Pl. Pacif. N.W. 3: 330 | 1961 |
| Fabaceae | |
Lupinus sulphureus subsp. sulphureus
| | | |
| Fabaceae | |
Lupinus sulphureus var. sulphureus
| | | |
| Fabaceae | |
Lupinus sulphureus subsp. whithamii
| (C.P. Sm.) L.Ll. Phillips | Res. Stud. State Coll. Wash. 23(3): 193 | 1955 |