What is in the picture?
Capparis is a flowering plant genus in the family Capparaceae which is included in the Brassicaceae in the unrevised APG II system. These plants are shrubs or lianas and are collectively known as caper shrubs or caperbushes. Capparis species occur over a wide range of habitat in the subtropical and tropical zones.
Caperbushes are mainly used by humans for their fruit, which are rich in micronutrients. C. spinosa, simply known as caper, yields fruit and more importantly flower buds, which are widely used pickled as a vegetable condiment. The fruit of other species, such as karir (C. decidua), are also used for cooking; C. mitchellii and the Wild passionfruit (the local subspecies of C. spinosa) are well-known bush tucker in Australia. Mabinlang seeds (C. masaikai) are eaten as sweets.
The 1889 book 'The Useful Native Plants of Australia records that Capparis canescens was also referred to as "Mondoleu" by the indigenous people from Rockhampton area of Queensland and that "The fruit is pyriform and half an inch in diameter. It is eaten by the aborigines without any preparation." (Thozet.) Mr. P. O'Shanesy observes that the pulpy part in which these Australian species of Capparis are imbedded is a good substitute for mustard."