1 | Sepals and petals always 4. |
1' | Sepals and petals usually 5. |
2 | Leaves not densely imbricate, stems clearly visible. |
2' | Leaves densely imbricate, stems not visible. |
3 | Sepals shorter than petals; pedicels ± densely pubescent. |
3' | Sepals longer than petals; pedicels glabrous. |
4 | Flowers axillary, solitary; leaves not more than 15 mm long. |
4' | Flowers 2-4 in a terminal monochasium; leaves on non-flowering shoots 8-45 mm long. |
5 | Sepals not strongly nerved, only slightly white-dotted; capsule longer than sepals. |
5' | Sepals strongly white-dotted, prominently nerved; capsule shorter than sepals. |
6 | Leaves erect; pedicels 6-20 mm; sepals with apex obtuse to cucullate |
6' | Leaves patent; pedicels 4 mm; sepals with apex acute. |