There are several ways that plants are adapted to being waterwise.
1.Succulents are the first to come to mind. Consider plants like Aloes, Bulbine, Cotyledons, Portulacarya and Crassula families.
2. Some plants have a wax layer which prevents transpiration. Think of Grewia occidentalis and Jasminum multipartitum.
3. Families of small, needle-like leaves like the Agathosma, Coleonema and The Erica species.
4. Bulbs like Cyrtanthus, Scadoxus, Gladiolus, Gloriosa and those with tuberous roots like Kniphofia, Crinums and Dietes.