| 1. Stem ± leafless; leaf odd-2-ternate-pinnate, 1° leaflets 3, 1 terminal, 1 pair lateral; raceme few-flowered; fruit sickle-shaped, 1.52.5 cm |
| C. virgata |
| 1' Stem leafy; leaf generally even-2-pinnate, 1° leaflets 312 pairs; racemes many-flowered; fruit ± straight, 612 cm |
| |
| 2. Petals > 2 cm; stamens red, strongly exserted; sepals all alike |
| C. gilliesii |
| 2' Petals < 1 cm; stamens yellow, barely exserted; sepals not all alike (lowest 1 boat-shaped, with many long, marginal teeth) |
| C. spinosa
|