Thanks DogsNDaylilies and Lin for your replies but I don't have that feeling of the mystery plant resembling Tradescantia zebrina I am familiar with and which has some succulent touch and feel.
Orginally I thought it had some resemblance to Dracaena, but that genus doesn't occur in Brazil (nor does Aridarum , Lin..)
It might stay a mystery plant like some other Brazilians I have posted..