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 rounded, 2-3 inches long, composed of fleshy carpels
each containing a seed, green at first with a resemblance to cones,
ripening to a rich orange colour. They are pleasant but unsatisfactory
eating owing to the large number of seeds embedded in the juicy flesh.
Birds are very partial to them, hollowing them out before they ripen.
=Uses.=—The fruit is eaten fresh.
[Illustration]
=BALANITES AEGYPTIACA= Del.—_Aduwa_. “_Desert Date_.” SIMARUBACEAE.
In the north this is one of the commonest trees on loose sand or
barren, stony wastes, where it is often the only species to survive
the extreme conditions. It averages 15-20 feet high, but 30 feet is
not uncommon, with a girth of 4-5 feet. The long green thorns and
small dark leaves distinguish it. The form is roughly spherical, with
a tangled mass of long thorny twigs, whose ends droop or protrude here
and there some feet from the main thicket. It extends northwards to the
limits of tree growth, affording fodder for camels and goats.
=The Bark= is grey, with long, wide, deep, vertical fissures in which
the yellow of the new bark can be seen. The scales are long, thick,
prominent and ragged. The branch bark is distinctive. Dark green and
smooth, the cream-coloured lenticels of various lengths cover it ever
more thickly from the tip downwards till the green colour is completely
obscured and the grey of the branch bark is reached. The slash is pale
yellow.
=The Thorns= are modified shoots borne spirally round the long slender
twigs in the leaf axils, 2-3 inches long, tapering evenly to a strong,
sharp point. They incline slightly forward and barely curve. They are
dark green and persist on the branches.
=The Wood= is light yellow with sometimes greyish discolorations. In
transverse section the rings are distinct in wavy light lines; the
pores are small, open and in little groups in concentric rings and the
rays are clearly visible as light lines of various overlapping lengths.
In radial section the rays add a figure to the wood in lines up to an
inch long. In vertical section the wood is of even colour and texture,
close grained and sound. It is easy to carpenter and planes smoothly
without picking up. Weight 48-50 lbs. a cubic foot.
=The Leaves=, with the thorns in their axils, are really paired
leaflets on a short, common stalk; 1½-2 inches long, over 1 inch wide,
a very dull, dark green, they are unequal lobed, as illustrated, with
a tendency to close up along the mid-rib. They assume a vertical
position, even when the twig droops, the stalks bending to adjust
themselves to this position.
=The Flowers=, in the leaf axils, are found from November to March, in
spikes up to 3 inches long, often shortened to resemble round clusters.
Each flower is ½ inch across, with five small green sepals, five longer
and darker green petals, ten short yellow stamens and a shining dark
green ovary with short, blunt pistil. The tree sometimes flowers out of
season.
Public-domain text, read in full here on John Shaqi.
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