Carissa grandiflora (macrocarpa ) 

Many-branched, spiny shrub with ovate, rich green leaves, to 1.5cm long. Fragrant, waxy, white, jasmine-like flowers, 2cm wide, are borne in terminal or axillary cymes, to 10cm long, in late spring; they are followed by plum-like, ovoid-ellipsoid, red to purple-black fruit, 2-3cm long. Height 0.5-1m or more, Spread 1m or more. Native of S. Africa. Various cultivars have been selected, including ‘Fancy’, which is erect and very free-flowering, with glossy, dark green leaves and orange-red fruit, and ‘Tuttlei’ which is dwarf, semi-prostrate, and dense, and useful as ground cover or for containers.