1 | Fruit a siliqua, i.e. less than three times as long as broad. Ovary ovoid to pyriform. |
1' | Fruit a siliqua, i.e. more than three times as long as broad. Ovary ± cylindrical. |
2 | Silicule with two seeds, orbicular, elliptic in outline |
2' | Silicule with more than two seeds, triangular in outline |
3 | Siliqua corky-spongy, non-dehiscent |
3' | Siliqua opening by two valves. |
4 | Siliqua narrowing into a conical beak (rostrum), terminated by the style |
4' | Siliqua without a rostrum, ± abruptly terminated by the style. |
5 | Siliqua with a thickened replum (i.e. thickened edge of the septum of the siliqua, on which the seeds grow), explosively dehiscent by coiling valves |
5' | Siliqua with a thin replum; valves opening without coiling |