1 | Leaf-sheath elongated, extending along the petiole for about 1/4 of its length (Spp. 1-7) |
1' | Leaf-sheath short or obsolete, restricted to the base of the petiole. |
2 | Style arms spreading, at least in fruit. |
2' | Style arms erect, fused, forming a beak in fruit. |
3 | Flowers arranged racemosely (Sp. 8) |
3' | Flowers arranged in umbellules or capitula (Spp. 9-14) |
4 | Inflorescence large, +- as long as the leaves (Spp. 15-19) |
4' | Inflorescence much shorter than the leaves (Spp. 20-23) |