Tons of seed of Hedysarum boreale Nutt. (Northern Sweetvetch) (Fabaceae) are desired for extensive rehabilitation of degraded rangeland in the US Rocky Mountains and Intermountain West. H. boreale requires bee visitation for seed set, and a manageable bee pollinator is needed to farm affordable seed. In this study, several species of native cavity-nesting Osmia (Megachilidae) and the European honeybee, Apis mellifera (Apidae), were evaluated for their effectiveness as H. boreale pollinators. Results suggest that the tested Osmia species can reproduce on H. boreale and are more effective pollinators of H. boreale than Apis mellifera.