| Inflorescences | simple or branched, lateral branches recumbent | erect, mostly simple |
|---|
| Size of the flowers | small, perianth less than 8 mm long, often ca 5 mm | perianth 10 mm long, or more |
|---|
| Tepals | always 3-veined | 5–7-veined |
|---|
| Stamens | – anthers always shorter than the filaments – filaments swollen and +/- papillate, or only flattened – anthers dorsifixed – a nther connective without heel extension | – anthers shorter, equal or longer than the filaments – filaments flat, wide, narrowed at apex, always without papillae – anthers basifixed – anther connective frequently with a more-or-less elongated heel |
|---|
| Ovary | locules with 1–5(–6) ovules | locules with 6–16(–20) ovules |
|---|
| Fruits | capsules erect or recumbents (like the flowers); as broad as high, at most 5 mm high, except for C. namorokense, which measure 8–9 mm high | capsules always erect, longer or equal than wide, large: 6 mm long or more |
|---|
| Geographical distribution see Fig. 8 | throughout Madagascar except the SW and extreme S, most species from the North | from the South, South-east, Centre, South-west, many species from the central zone of the high plateaus. Absent from the centre-west and the East coastal band (ecoregion East), and the North. |
|---|