The useful trees of northern NigeriaLely, Hugh Vandervaes
Science
The useful trees of northern Nigeria
Lely, Hugh Vandervaes
Plants, Useful -- Nigeria, Northern; Trees -- Nigeria, Northern
=The Fruits= are small irregularly pear-shaped drupes a little over ¼
inch long, greyish with a purple bloom which is easily rubbed off. They
have a highly resinous flesh and white kernel and ripen in the early
spring. They grow in clusters along the twigs and the crop is often a
heavy one.
=Uses.=—The resin is used as a scent on garments and medicinally, taken
internally.
[Illustration]
=BAUHINIA RETICULATA= DC.—_Kalgo, Kargo_. LEGUMINOSAE.
A medium-sized tree or shrub, in which latter form it occurs over large
areas of country as pure growth, particularly as secondary growth
in farmed land, where it is a great pest to the farmer who desires
to continue sowings. It grows prolifically from stumps which the
farmer does not trouble to uproot. It is very fond of small, shallow
depressions, where it will grow to the exclusion of all else. In its
proper habitat it will grow over 30 feet high with a girth of 8-10
feet, with short bole and an enormous rounded crown of dense foliage
affording good shade. It is one of the commonest species in the north.
=The Bark= is a dull, dark grey, sometimes with a rust-red tinge,
deeply fissured and ridged with hard, brittle bark of some thickness,
which falls in large, ragged sections. That of young trees can be
ripped off readily after being cut. The slash is bright crimson,
turning brown on exposure, and shows the fibrous nature of the bark.
=The Wood= is oak-brown, rather dirty looking, with light patches and
dark discolorations, especially round flaws. In transverse section the
rings are indistinct but the hard and soft tissue is very well marked,
mostly in concentric lines. The pores are small, evenly distributed,
mostly in festoons joined by the soft tissue. The rays are extremely
fine and closely spaced, invisible to the unaided eye and very faintly
seen in radial section as small bands. The wood is easily sawn but
picks up badly under the plane. It is very strong and tough and weighs
50 lbs. a cubic foot.
=The Leaves= are bifoliate, the depth to which the leaf is divided
varying a great deal and the angle being sharp or rounded. They average
4 inches across but those from stool shoots especially may be very much
larger and generally the larger the tree the smaller the leaves. There
are four main nerves on each leaflet and the mid-rib projects slightly
between them. The leaf stalk is an inch long, with large base. Like all
species of this genus the leaf tends to fold up along the mid-rib. The
colour is lighter beneath and the venation a very intricate network and
prominent. The texture is tough.
=The Flowers= are in spikes, 2-6 inches long and appear in February or
March or even as late as June. Each has a 5-lobed calyx, green-brown
in colour, 5 white petals, wrinkled and overlapping at the edges, 10
stamens of varied length with brown anthers and a short, blunt pistil.
The flowers drop off readily when handled and are about an inch long.
They do not open very wide.
Public-domain text, read in full here on John Shaqi.
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