| 1 | Petals white, the posterior with a yellow patch; upper leaf surface velvety; ovary patently hairy |
| 1' | Petals yellow and orange to red |
| 2 | Upper leaf surface puberulous, hairs reddish brown; buds reddish brown; ovary hirsute; petals lanceolate, tapering towards the short claw |
| 2' | Upper leaf surface velvety, greyish green; buds greyish or light brown; ovary ap- pressed pubescent, three posterior petals spathulate with claw longer than or equal to lamina 3 |
