Weldenia is not a monotypic genus because there are TWO species of Weldenia. The one that is more commonly available is Weldenia candida. I forget what the other species is called, but I will look it up. The other species grows only near the Guatemala/Mexico border. If you need cultivation information I can probably help you out. I'll wager I'm the only person on this list who has seen the plant growing in its natural environment. (I'm the guy who made the wiki page for Weldenia.) What kind of info do you need? -Dennis