| 1 | Leaves greyish from dense, short hairs |
| 1' | Leaves never greyish, subglabrous to scabridulous hairy |
| 2 | Leaves only with very few hairs, shining, ovate to ovate-oblong or ovate-lanceolate |
| 2' | Leaves scabridulous on upper, densely hairy along nerves on lower side, more or less lanceolate |
