Well, ok couple of problems for you then yamba is a fairly common name in numerous West African languages, and yes it is the Wolof slang for cannabis!
Its a region in Burkina Faso, and is the name of a kind of furniture wood (like Kwila is) when the tree is cut down and processed, again from BF.
But in terms of a specific tree I've got nix....give me a region and a little while and I would hope to be able to track it down.
__________________ Sean Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
- Kahlil Gibran |