| 1 | Petals subemarginate; intermediate leaves more than 4 times longer than wide. |
| 1' | Petals deeply emarginate to bifid; intermediate leaves 1.5-4 times longer than wide. |
| 2 | At least the upper bracts with membranaceous margin. |
| 2' | Upper bracts green. |
| 3 | Pedicels in both flower and fruit much longer than calyx; stamen with a gland at the base of the filament. |
| 3' | Pedicels shorter than or as long as calyx, 1-3 mm in flower, 2-6 mm in fruit; no glands at the base of the filaments. |
