| |
| 2. Stem, leaves ± glabrous; leaflets not close, not overlapped, 46 mm, exceeded by main leaf axis |
| S. armata |
| 2' Stem, leaves densely white-hairy; leaflets close, overlapped, 12.5 cm, not exceeded by main leaf axis |
| S. covesii |
| 1' Leaflets 610(18) pairs |
| |
| 3. Stipules large, conspicuous, generally persistent; unopened flowers enveloped in large, dark-colored bracts; fruit flat, dehiscent |
| S. didymobotrya |
| 3' Stipules small, inconspicuous, ephemeral; unopened flowers not enveloped in bracts; fruit not flat, indehiscent |
| S. multiglandulosa
|