All species occur in the summer-rainfall areas, except for Z. odorata at Nieuwoudtville (winter-rainfall) and Z. aethiopica which is widespread and commonly found in marshy areas.
di'species tsotlhe di bonala kwa mafelong a a bonang dipula tsa paka ya selemo, kwa ntle ga Z. odorata ka Nieuwoudtville (dipula tsa mariga) le Z. aethiopica e e mphatlhalatsa mme e tlwaelegile kwa mafelong a a nang le metlhaga le dithetse.