| 1 | Twigs slender, to 3.5 mm in diam. Cymules up to 5 mm long, staked, lax |
| 1' | Twigs thick, to 7 mm in diam. Cymules sessile, dense |
| 2 | Leaves 2-4-jugate. Stamens mostly 6(-10). Fruits nearly smooth or rarely with up to 1 mm high, acute, pyramidal warts |
| 2' | Leaves 1- or 2- (or 3-)jugate. Stamens mostly 7 (or 6). Fruits with up to 3 mm high, acute, pyramidal warts. |
