For instance , Astragalus separated from the Oxytropis some 16 to 12 million years ago .
It has been possible to date the divergence of some of the groups within the Faboideae , even though diversification within each genus was relatively recent .
Astragalus separated from the Oxytropis some 16 to 12 million years ago .
It has been possible to date the divergence of some of the groups within the Faboideae , even though diversification within each genus was relatively recent .