Diospyros is a genus of over 700 species of deciduous and evergreen trees, shrubs and small bushes. The majority are native to the tropics, with only a few species extending into temperate regions. Depending on their nature, individual species are commonly known as ebony or persimmon trees. Some are valued for their hard, heavy, dark timber, and some for their fruit. Some are useful as ornamentals and many are of local ecological importance. The generic name Diospyros comes from the ancient Greek words Dios and pyros. In context this means more or less divine fruit or divine food, though its literal meaning is more like Wheat of Zeus.

Diospyros whyteana commonly known as Bladder-nut or Blackbark in English and Swartbas in Afrikaans has a neat growth habit, glossy dark green leaves and masses of red fruit. It is an excellent tree for the garden. It can be planted as an accent plant, particularly in a small garden where space is limited. As it is decorative and responds so well to clipping it is an outstanding plant to grow as a hedge. The bladdernut makes an attractive container plant for the patio and is also a good species for bonsai. It attracts birds to the garden and sweetly scented flowers add that something special to the garden. The bladdernut is an evergreen shrub or small multi-stemmed tree with a straight trunk that branches low down to form a dense, round to pyramidal crown. The bark on young branches is yellow-green to pinkish, covered by fine coppery hairs; but smooth and blackish grey on older stems and branches. The shiny leaves, also with a fringe of ginger hairs, are leathery, dark green above and lighter below. An occasional bright red or orange leaf occurs adding to the overall attractiveness of this plant. Scented flowers, hanging from hairy stalks, appear in spring. They are bell-shaped, white to creamy yellow and male and female flowers occur on different trees. The edible fruits are somewhat bitter and so not very tasty. The roasted seeds have been used as a coffee substitute. The wood is variable in colour, mainly whitish with brown to purple stripes, dense, evenly grained, strong and suitable for furniture, but large logs are often not available. Smaller diameter stems are used for implement handles. Medicinally bark extracts are administered as enemas for treating menstrual pain, impotency and infertility. A leaf and root infusion can be used to treat rashes.