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
A large tree which, when full grown attains a height of over 60 feet
and a girth of 12-15 feet. It is not commonly distributed all over
the country but is very common locally, _e.g._, in N.E. Sokoto and in
N.W. Bauchi, in both of which places a large number of big trees are
found over a small area of country. It may have a clean bole up to 20
feet or more in length with, in old trees, root flanges. The species
is so frequently lopped for fodder that it is rare to find a naturally
formed tree except in uninhabited forest where it produces a very
large crown rounded at the top and, as a rule, branching low down. The
limbs are large and bent; the twigs slender, horizontally spreading or
drooping. The foliage is dense but not heavy. There are often thickets
of adventitious shoots on the trunk.
=The Bark= is a light, slightly bluish-tinted grey, fairly smooth,
with large, thin, very hard, rounded scales which come away from the
lower end, remaining attached to the tree at the upper end and giving
the rather curious look of sliding down the tree. Under the scales the
bark is light brown. The slash is mottled, dark brown crumbling, white
fibrous.
=The Wood= is light yellow in colour, soft, fairly close-grained, easy
to work with all tools, planes to a dull, smooth finish, cracks only
slightly when seasoning, is not durable under exposure, being inclined
to bluish discolorations and weighs only 35 lbs. per cubic foot. The
native does not use it, but it seems a useful soft timber. The pores
are very numerous, of different sizes, some quite large, open and in
festoons. The rays are just visible with the unaided eye and the rings
plainly seen as close fine light lines. The rays are much waved.
=The Leaves= are variable in shape and size, some toothed and some
plain along the margin. They are from 2-4 inches long and from 1-2
inches wide with pointed tip and ¼ inch stalk. The serrate leaves
are found in numbers on the adventitious twigs, the entire leaves
generally on the long, slender twigs which bear the flowers. Old leaves
are very much darker in colour and rougher to the touch than younger
leaves. Both surfaces are covered with very short, stiff hairs and are
rasping to the touch. There are three main veins and the leaf is not
symmetrical in shape. They turn their upper surface to the sky and are
arranged alternately on the twig.
=The Flowers= which appear from December onwards are in minute,
branched clusters in the leaf axils. Each flower is green in colour and
has 5 sepals, 5 stamens with yellow anthers, and a twice forked stigma
which enlarges as the fruit grows and then withers. The remains of the
sepals and the stamens are found at the base of the fully grown fruit
whilst it is green.
Public-domain text, read in full here on John Shaqi.
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