KEY TO THE GENERA

1Climbers or scandent shrubs. Flowers with 5 equal, fertile stamens, in usually rather few-flowered thyrses or cymes, sometimes reduced to a single axillary flower. Leaves simple, entire or subentire, alternate
1'Trees. Flowers in usually large, racemose, terminal or axillary panicles. Fertile stamens only 2, the other 3 abortive and reduced to scales or nectary-like bodies. Leaves uneven pinnate, leaflets opposite on ± noded rachis, rarely simple, entire or toothed, spirally arranged