Ogbono is
botanically known as Irvingia gabonensis (Aubry-Lecomte ex O’Rorke)
Baill and highly demanded its wide benefits. Ogbono is a specie of
African trees that belongs to the genus Irvingia. The high demand for
ogbono is due to its high socioeconomic, nutritional and medicinal
values. Different parts of the world have different names for Irvingia
gabonensis for example, it is known as ugiri or ogbono by the Igbo
people, biri, goron, goronor by Hausa people, ogwi by the Benin people,
mbukpabuyo by the Ibibio and Efik people, oro, apon or aapon by Yoruba,
bobo, manguier or sauvage by French and apioro by the Deltan people.
It is equally known as dika, sweet bush mango, odika, iba-tree,
chocolatier, African mango, dika nut, duiker nut, manguier sauvage, wild
mango, Irvingia and dika bread tree.
According
to Ladipo et al., (1996), the Irvingia genus is made up of 7 species
comprising of Irvingia wombolu, Irvingia gabonensis, Irvingia giarobur,
Irvingia excels, Irvingia malayaria, Irvingia gradifolia and Irvingia
smithii. Unlike the pulp of some other Irvingia spp., the pulp of
Irvingia gabonensis is edible, sweet and juicy. Irvingia gabonensis is
closely related to Irvingia wombolu. While Irvingia wombolu bears
inedible and bitter fruits, the Irvingia gabonensis bears edible ones.
Irvingia excelsa Mildbr fruit pulp is hard and inedible while Irvingia
smithii Hook.f. fresh fruit is sweet and edible.
The ogbono
tree measures between 15 to 40 meters with slightly buttressed bole. It
bears edible mango-like fruits that are highly valued for their
nutritious nuts. Ogbono tree is prevalent in the dry and wet tropical
zones such as Nigeria, Angola, Uganda, Congo, Cameroon, Ghana, Togo,
Benin, Côte d’Ivoire and Southeast Asia. It can grow in a farmland,
semi-deciduous forest, canopied bush or gallery forests. Although this
fruit is also referred to as bush mango, yet it is in no way similar
with mango fruit.
Irvingia
gabonensis tree is distinguished by its compact crown with branchlets
that end in a curved, narrow, stipular sheath. The tree grows upright to
approximately 40 metres height and 1-metre diameter. This usually
covers the leaf bud. The leaves are elliptic, slightly obovate, dark
green in appearance and measures approximately 5 to 15 x 2.5 to 6 cm.
Ogbono leaves bear between five to ten pairs of irregular lateral veins
that have the lower ones to protrude out closely to the margin.
The
slender, bisexual flowers are yellow to greenish-white in colour with
some clustered racemes formed above the leaves. Ogbono fruits are
greenish when unripe but change to yellow when ripe. The evergreen crown
is dense and spherical in shape. The drupe fruit is distinguished by
its fibrous flesh and the nut is woody and contains one seed.