Unidentified tree seedlings

Unidentified tree seedlings

Observation - Unidentified tree seedlings - Southern Africa. Description: I planted these as seeds but stupidly didn't label them. Can somebody please identify them for me. I think they are either wild olive, white stink wood or wisteria, but don't know which. Thanks

I planted these as seeds but stupidly didn't label them. Can somebody please identify them for me. I think they are either wild olive, white stink wood or wisteria, but don't know which.
Thanks