Enumerate on convergent and divergent evolution with suitable examples in plants.

Explanation

Convergent evolution: The different structures evolving for the same function and these structures are called analogous.
E.g. Potato (stem modification) and sweet potato (root modification)
Divergent evolution: The same structure developed along different directions due to adaptations to different needs and these structures are called homologous. E.g. Thorn of Bougainvillea and Tendril of Cucurbita