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 Wood= is yellow or greenish-yellow. In transverse section the
pores are small, single or in small groups, and the rings are very
faint, the rays hardly visible, except as small brown bands in
radial section. In the plank the pores are brown and open and the
grain irregular, with black lines, flecks and brown patches. An
unsatisfactory wood, cross-grained and tough, but strong, hard and
fairly sound. Difficult to saw and plane. Weight 55 lbs. a cubic foot.
=The Leaves= vary much in size from 3 inches long and 2 inches wide
to 5 inches long and 2½ inches wide. The base may be slightly cordate
or narrowing and the tip is generally abruptly pointed. The margin is
wavy, the leaf rarely flat and the foliage is very subject to attacks
by insects and is much contorted, indented and disfigured. The upper
surface has a dusty grey bloom and the lower surface is grey. The
venation is raised on both sides of the leaf. The whole is soft and
velvety to the touch. There is a ¼ inch stalk.
=The Flowers= are yellowish and in racemes, the spikes 1-2 inches long.
They first appear when the tree is leafless from December onwards and
are scented. Each consists of a 4-lobed calyx, 4 small white, recurved
petals and 8 stamens opposite sepals and petals.
=The Fruits= are 4-winged, 1-1¼ inches long, all shades of red till
they are ripe, when they turn brown. The seed is long and 4-angled.
[Illustration]
=CORDIA ABYSSINICA= R. Br.—_Aliliba_. BORAGINACEAE.
A small tree up to 25 feet high, either shrub-like in habit or with a
short bole and round crown. The distinguishing features are the large
heart-shaped leaves, large heads of papery flowers and the clusters of
yellow fruits. As a shrub the branches spring from ground level and
form a large compact bush, and as a tree the bole may be from 6-10 feet
long and some 2-3 feet in girth.
=The Bark= is light grey and smooth with small lenticels. Only on the
larger trees do scales form and the bark splits longitudinally and has
a fibrous appearance. The slash is white.
=The Leaves= vary greatly in size from the quite small ones at the twig
ends to the large basal leaves a foot long and 9 inches wide. They are
heart-shaped, with stout stalks, the mid-rib curved back and the leaf
tending to fold up along its length. Both surfaces are rough with short
hairs. The upper surface is dark green, the lower paler. The venation
is bold, the mid-rib not straight, but changing direction at each
lateral nerve. The lateral nerves are connected by parallel veins. The
leaf is tough in texture.
Public-domain text, read in full here on John Shaqi.
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