Does anyone know the species of this cerrado plant in the picture?

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Luis Carlos da Silva Ramos

Lembra a familia rubiacea; mas o melhor e checar um bontanico da UFMG, se não for questão de prova...

Aristea Azevedo

The species is "Pterandra pyroidea" (Malpighiaceae).

Daniel De Melo Casali

Thank you very much Aristea!

And Luiz also. It was not for an exam question, just biological curiosity!