| 1. Corolla white, banner < 10 mm |
| C. multiflorus |
| 1' Corolla pale or golden yellow, banner > 10 mm |
| |
| 2. Calyx glabrous; fruit flat, glabrous except margin; branches generally 5-angled |
| C. scoparius |
| 2' Calyx appressed-hairy; fruit ± inflated, densely white-hairy; branches generally 810-angled |
| C. striatus
|