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 Bark= is uniform dull grey. Long wide fissures and prominent
ridges of hard bark ascend the bole and the bark appears as if it was
stretched without being cast off. Light brown patches, quickly turning
grey, are left by the falling scales. The slash is pale brown and
fibrous.
=The Thorns= are in pairs, under ½ inch long and slightly recurved.
They are pale brown with white bases. The young tree is armed all over,
but as the tree ages the thorns leave the stem and finally the higher
branches are free as if protection seemed to be unnecessary at a height.
=The Wood.=—The heartwood is a light, clean yellow. The sapwood is a
dirty white. Frequently the whole wood is a dirty white or grey, but
this is due to discolourations from mould and the wood should always be
seasoned in dry air and not allowed to get wet. In transverse section
the rings are indistinct and wide apart, the pores are small and evenly
distributed, mostly in festoons with twin pores here and there, the
soft tissue plainly seen as concentric lines with the hard tissue
alternating. The rays are extremely fine, very regular and closely
spaced and quite invisible to the naked eye. In vertical section there
are faint bands of colour, with light reflecting flecks in tangential
section. The wood is soft, very easy to work with all tools, seasons
well if looked after, and finishes well under the plane. The weight is
35 lbs. a cubic foot.
=The Leaves= are bipinnate, 4 inches long with 6-7 pairs of pinnae
bearing some 10-15 pairs of dusty, grey-green leaflets, covered with
tiny hairs. The foliage in the mass appears bluish-green. It appears
at the end of September and is susceptible to insect, caterpillar and
locust.
=The Flowers=, from October to December, are in dense spikes 3-4
inches long, scented. The lower inch of the spike is flowerless.
Several spikes are borne at the twig ends. Each flower has a 5-lobed
cream-coloured calyx with pink centre, 40-50 stamens, and a short
pistil with slightly clubbed stigma.
=The Fruits= are pods, at first green and sickle shaped, ripening to
a bright orange and twisting into strange shapes. They are 4-6 inches
long, 1 inch wide, concave on one side, convex on the other. They
contain dark brown shiny seeds ⅜ inch long. The pods ripen in January
and February and fall entire, rotting on the ground.
=Uses.=—Inferior canoes, of the stitched together type are made. The
ripe pods are collected and fed to cattle, sheep and goats. The common
brown kite nests frequently in its branches in March and April.
[Illustration]
=ACACIA ARABICA= Willd.—_Gabaruwa, Bagaruwa_. LEGUMINOSAE.
Public-domain text, read in full here on John Shaqi.
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