| 1 | Leaf apex rounded to emarginate; inflorescence glabrous. |
| 1' | Leaf apex acuminate or cuspidate; inflorescence glabrous or puberulent. |
| 2 | Inflorescence puberulent, dichotomously branched, rather short, less then 3 cm; bracts inconspicuous; leaves acuminate, base cuneate; petals reflexed; anther connective not produced beyond the thecae; fruits usually ellipsoid. |
| 2' | Inflorescence glabrous, paniculate, often to 8 cm long; bracts spreading, persistent; leaves acuminate or cuspidate, base acute to obtuse; petals suberect; connective distinctively produced; fruits globose or nearly so. |
