Dovyalis Caffra
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''Dovyalis afra'', commonly known as the Kei apple, is a small to medium-sized tree, native to southern
Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...
. Its distribution extends from the
Kei River The Great Kei River is a river in the Eastern Cape province of South Africa. It is formed by the confluence of the Black Kei River and White Kei River, northeast of Cathcart. It flows for and ends in the Great Kei Estuary at the Indian Ocean w ...
in the south, from which the common name derives, northwards along the eastern side of the continent to
Tanzania Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to t ...
. The ripe fruits (which are present from December to January) are edible and similar in appearance to
apricot An apricot (, ) is a fruit, or the tree that bears the fruit, of several species in the genus ''Prunus''. Usually an apricot is from the species '' P. armeniaca'', but the fruits of the other species in ''Prunus'' sect. ''Armeniaca'' are also ...
s, though they are quite acidic due to having a high concentration of
malic acid Malic acid is an organic compound with the molecular formula . It is a dicarboxylic acid that is made by all living organisms, contributes to the sour taste of fruits, and is used as a food additive. Malic acid has two stereoisomeric forms ( ...
. It is a usually found in dry types of woodland when it grows to 6 m tall. In moister types of open woodland it reaches its greatest size of about 8–9 metres. A tree, with sharp, 3–6 cm long stem spines in the leaf
axil A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, fl ...
s, and large sturdy thorns. Buds at the base of the spine produce clusters of alternately arranged simple ovate
leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, ...
3–6 cm long. The
flower Flowers, also known as blooms and blossoms, are the reproductive structures of flowering plants ( angiosperms). Typically, they are structured in four circular levels, called whorls, around the end of a stalk. These whorls include: calyx, m ...
s are inconspicuous, solitary or clustered, with no petals. It is
dioecious Dioecy ( ; ; adj. dioecious, ) is a characteristic of certain species that have distinct unisexual individuals, each producing either male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproduction is ...
, with male and female flowers on separate plants, though some female plants are
parthenogenetic Parthenogenesis (; from the Greek + ) is a natural form of asexual reproduction in which the embryo develops directly from an egg without need for fertilization. In animals, parthenogenesis means the development of an embryo from an unfertiliz ...
. The
fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...
is an edible bright yellow or orange globose
berry A berry is a small, pulpy, and often edible fruit. Typically, berries are juicy, rounded, brightly colored, sweet, sour or tart, and do not have a stone or pit although many pips or seeds may be present. Common examples of berries in the cul ...
2.5–4 cm diameter, with the skin and flesh of a uniform colour and containing several small
seed In botany, a seed is a plant structure containing an embryo and stored nutrients in a protective coat called a ''testa''. More generally, the term "seed" means anything that can be Sowing, sown, which may include seed and husk or tuber. Seeds ...
s. Production is often copious, weighing down the branches during the summer. They are juicy, tasty and very
acid An acid is a molecule or ion capable of either donating a proton (i.e. Hydron, hydrogen cation, H+), known as a Brønsted–Lowry acid–base theory, Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis ...
ic.


Cultivation and uses

A traditional food plant in the areas it occurs, this little-known fruit has potential to improve nutrition, boost food security, foster rural development and support sustainable landcare. Kei-apples are often eaten fresh or sprinkled with
sugar Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose Glucose is a sugar with the Chemical formula#Molecular formula, molecul ...
to complement their natural acidity. Aside from being eaten fresh, the fruit can be made into
jam Fruit preserves are preparations of fruits whose main preserving agent is sugar and sometimes acid, often stored in glass jars and used as a condiment or spread. There are many varieties of fruit preserves globally, distinguished by the meth ...
, used in desserts, or
pickled Pickling is the process of preserving or extending the shelf life of food by either anaerobic fermentation in brine or immersion in vinegar. The pickling procedure typically affects the food's texture and flavor. The resulting food is called ...
(their natural acidity means vinegar is not needed). In Kenya, it is mostly used for live fences and hedges.(Chiel) locally known in luo Although it is native to southern Africa, it has also been introduced to the
Mediterranean The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern ...
,
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
,
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
, and other regions with
subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones immediately to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Ge ...
and warm temperate climates. In these places it is most often grown as an
ornamental plant Ornamental plants or ''garden plants'' are plants that are primarily grown for their beauty but also for qualities such as scent or how they shape physical space. Many flowering plants and garden varieties tend to be specially bred cultivars th ...
, being popular as an impenetrable
hedge A hedge or hedgerow is a line of closely spaced (3 feet or closer) shrubs and sometimes trees, planted and trained to form a barrier or to mark the boundary of an area, such as between neighbouring properties. Hedges that are used to separate ...
. It is
salt In common usage, salt is a mineral composed primarily of sodium chloride (NaCl). When used in food, especially in granulated form, it is more formally called table salt. In the form of a natural crystalline mineral, salt is also known as r ...
and
drought A drought is a period of drier-than-normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D.  Jiang, A.  Khan, W.  Pokam Mba, D.  Rosenfeld, J. Tierney, ...
-tolerant, so useful for
coast A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...
al landscaping in dry regions. Although a subtropical species, the Kei apple is able to survive temperatures as low as . Gardeners who want fruit require a female plant; a fertile female plant and a fertile male plant is ideal. Kei apples are propagated by seed. Plants will bear about four years later.


Taxonomy

The original species name ''caffra'' is related to kaffir, an ethnic slur used towards black people in Africa. At the July 2024
International Botanical Congress International Botanical Congress (IBC) is an international meeting of Botany, botanists in all scientific fields, authorized by the International Association of Botanical and Mycological Societies (IABMS) and held every six years, with the locatio ...
, a vote was held with the result that "''caffra''" related names will be emended to ''afra'' related ones, with the implementation of this happening by the end of July 2024.


Ecology

The species is invasive in New Caledonia.


Gallery

image:Dovyalis caffra fruit.jpg, Ripe fruit Image:Dovyalis caffra00.jpg, Unripe fruit Image:Dovyalis caffra kz1.jpg, Thorns


References

* * {{Taxonbar, from=Q128941731, from2=Q1987504, from3=Q98074028, from4=Q87621236 Fruits originating in Africa afra Flora of Southern Africa Flora of Tanzania Flora of South Africa Flora of Mozambique Crops originating from South Africa Garden plants of Africa Drought-tolerant trees Ornamental trees Plants described in 1862 Taxa named by William Henry Harvey Taxa named by Joseph Dalton Hooker