The pics were taken a week ago, and the plant has a strong (to me) unpleasant smell, but the flowers are interesting. Sorry for the poor quality of the second photo.
SOLVED: Could you please help ID this plant?
You may be right, Growin. I'll have to go back to the garden where I cut that little sample and look at the flowers more attentively. Then I'll tell you my conclusion.
You're both right: Plectranthus neochilus.
Thank you very much.