1Inflorescence becoming paniculate by the successive development of branches below the umbellules. Fig. 19a
1'Inflorescence a compound umbel.
2Inflorescence with four orders of branching.
2'Inflorescence with three (or fewer) degrees of branching.
3Leaflets lanceolate.
3'Leaflets broader.
4Leaflets c. 4-7 cm long. Fig. 20f
4'Leaflets much longer
5Pedicels (at early anthesis) c. 10 mm long.
5'Pedicels (at early anthesis) c. 5 mm long, or shorter.
6Peduncles of umbellules with bracts or their scars. Fig. 21a
6'Peduncles of umbellules without bracts or their scars. Fig. 21b
7Leaves associated with the umbels rotund. Fig. 21e
7'Leaves (or leaflets) associated with the umbels ovate or elliptic.
8Leaves associated with the umbels ovate, ± fleshy, with the lower surface smooth (lateral veins obscure). Fig. 21f
8'Leaves (or leaflets) associated with the umbels ± elliptic, coriaceous or chartaceous, veins visible.
9Young parts glabrous
9'Young parts with rufous tomentum.
10Umbels at anthesis with numerous filamentous pedicels. Fig. 21c.
10'Umbels at anthesis with fewer stout pedicels. Fig. 21d
11Leaflets membranaceous or chartaceous.
11'Leaflets coriaceous.
12Mid-leaflets c. 16 cm long
12'Mid-leaflets c. 8 cm long or shorter.
13Leaflets usually 5-7 (Fig. 20a). Primary inflorescence branches usually short (c. 3-6 cm) and without articulations
13'Leaflets more numerous (Fig. 20d). Primary inflorescence branches longer (10-20 cm), with one or more leafy nodes
14Leaflets c. 5
14'Leaflets more numerous.
15Petals and stamens 6
15'Petals and stamens 4 or 5.
16Leaflets 6 cm long, or longer. Fig. 20b
16'Leaflets shorter. Fig. 20c