| 1 | Apex of ripe (dry) fruit distinctly flattened or emarginate |
| 1' | Apex of ripe (dry) fruit rounded, acute or apiculate |
| 2 | Corolla 9-14 mm long; ultimate divisions of the leaflets rather broad, ovate-lanceolate, obovate or cuneate |
| 2' | Corolla less than 9 mm long, ultimate divisions of the leaflets very narrow, linear-lanceolate, linear or almost filiform |
| 3 | Fruiting pedicels ascending |
| 3' | Fruiting pedicels recurved or patent |
| 4 | Fruits 3-4 mm long; flowers usually pinkish without purple tips |
| 4' | Fruits 2-3 mm long; flowers purple-tipped |
| 5 | Flowers 10-12(-14) mm long; sepals 2-4 mm long; apex of fruit apiculate |
| 5' | Flowers 9-10 mm long; sepals 1-2 mm long; apex of fruit obtuse |
| 6 | Peduncle as long as or longer than the raceme; corolla usually pale; sepals c. 5 mm long |
| 6' | Peduncle very short or almost absent; corolla bright pink or crimson-pink; sepals 2.5-3 mm long |
| 7 | Sepals minute, much narrower than the corolla, c. 0.5 mm long; flowers usually rather pallid |
| 7' | Sepals conspicuous, broader than the corolla, 1.5-3 mm long; flowers usually pink |
| 8 | Corolla 6-7 mm long; sepals 2.5-3 mm long, 2-2.5 mm wide; divisions of leaflets linear-lanceolate; fruit keeled but not conspicuously so |
| 8' | Corolla 3.5-5 mm long; sepals 1.5-2 mm long and about as wide; divisions of leaflets linear-filiform; fruit conspicuously keeled |
