| 1 | Petals longer than sepals; pedicels elongate 0.8-2.5 cm long |
| 1' | Petals shorter than sepals; pedicels usually less than 0.8 cm long |
| 2 | Bracts minute, subulate; sepals acute, with a narrow membranous margin |
| 2' | Bracts conspicuous, oblanceolate or linear-subulate; sepals acuminate with a distinct membranous margin |
| 3 | Flowers in lax cymes; sepals 2-2.5 mm long and about 0.8 mm wide; capsules 2.5 mm long; leaves ovate |
| 3' | Flowers in crowded cymes; sepals 5-6 mm long and 2-3 mm wide; capsules c. 4 mm long; leaves oblanceolate |
