Lupinus argenteus var. depressus (Rydberg) C.L. Hitchcock
Lupinus argenteus var. depressus (Rydberg) C.L. Hitchcock is a synonym sensu FNA Ed. Comm., 2023a of:
Lupinus argenteus var. rubricaulis (Greene) S.L. Welsh, an accepted variety name sensu FNA Ed. Comm., 2023a.