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  Capparis spinosa nummularia - native caper

Picture provided by Philip Clarke, from his new book Discovering Aboriginal Plant Use: Journeys of an Australian Anthropologist

This is a great bush tucker plant, growing to a medium sized dense shrub, and also can be grown as an ornamental, being a handsome plant although best suited to tropical and coastal areas of Northern Australia. Grows naturally around the coast and inland along rivers and creeks in rocky soils in WA, NT and QLD.
This is a native Australian relative of the well-known caper bush, the ripe fruits are delicious and the flower buds can also be pickled. The large white flowers have a delicate scent as well. The plant is butterfly attracting. The fruit is ripe when it turns orange and the skin begins to split.
Likes water during dry times of year. Sensitive to frost.