(Capparis spinosa var. nummularia)
Commonly known as 'Bush passionfruit' and the 'Caper Bush',
the Capparis spinosa var. nummularia is not a
passionfruit of the Passiflora spp. A more appropriate name is
the 'native caper' or 'bush caper', as the central Australia species are closely
related to the true caper bush.
When you look at the pulp of the fruit, you can see why it was given that common
name, unlike the true caper bush, the mature fruit is the valued part of the
plant and not the flower buds.
There are about five species here in Australia in the genus Capparis, with the Capparis spinosa var. nummularia
considered the best for cultivation.
C. umbonata is regarded by the Aboriginal people in the region as having
the best quality fruit, although it is rare, slow growing, has limited fruit
production and spiny branches, all negatives for mass cultivation.