This issue Arno takes a look at quite a few varieties of vegetables for dry conditions:

Poor man’s bean / Lablab bean
(Dolichos lablab)

Warrigal Greens / New Zealand Spinach
(Tetragonia tetragonioides)

Rosella
(Hibiscus sabdariffa)

Malabar spinach
(Basella alba and B. rubrum)

Brazilian spinach
(Alternanthera sissoo)

Abika/New Guinea Spinach
(Hibiscus manihot/Abelmoschus manihot)

Jacon
(Polymnia sanchifolia)

Sweet leaf
(Sauropus androgynous)

Chaya
(Cnidoscolus chayamansa)

This issue's article has content submitted courtesy of the Sub-Tropical Fruit Club of Queensland on the Star Apple (Chrysophyllum cainito), excellent fruit containing semi translucent soft white pulp with a mild, sweet flavour.