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 highly appreciated and eaten fresh. They are brought to
the big towns from long distances in some places and will sell for as
much as a penny each in the markets.
[Illustration]
=PARKIA FILICOIDEA= Welw.—_Dorowa_. “_Locust Bean Tree_.” LEGUMINOSAE.
This is the type tree of the Park formations and a very common and
well-known species with a wide distribution. Owing to its great value
as a food and its uses by the natives, it is often the sole occupant
of extensive areas of cultivation. It grows to large sizes, 50-60 feet
high with girths of 10 feet or more. The bole, in the case of trees
which are grown in the open, is short, not, as a rule, above 10 or 12
feet, and several large, spreading limbs form a very wide crown which
appears dark and dense at a distance, but which, in fact, gives only
average shade. There are small, rounded root-flanges. All trees near
habitation are owned by the individual. Those in the forests have a
different habit of growth, the bole being longer, the branches more
erect and the crown less spreading. The large crowns of the park trees
are generally due to the cutting of the branches for fuel. _See_
USES. The tree pollards well and shoots readily from the stool. It is
liable to attack from white ants when young, and to the ravages of
caterpillars which may completely defoliate the tree.
=The Bark= is dark brown or dull grey, with small, regular scales of
varying roughness. The branches and the stems of young trees are a
light grey, almost silvery, and smooth. The bark at the base of the
tree is often much chipped about by the natives who make an infusion
of it, drunk as a tonic. The slash is brick red, spongy and fibrous in
thin layer formation.
=The Wood.= The heartwood is a dull brown colour, the sapwood a dirty
yellow. Even the largest stems, 3-4 feet in diameter, cut in the north,
show none of this heartwood. In transverse section the rings are faint
and wide apart, the pores are large, open, fairly regularly distributed
in the well-marked soft tissue festoons, with nests of 3 or 4 here and
there. The rays are straight, continuous, evenly spaced, not all the
same thickness, and show as long, light-reflecting bands in radial
section. In vertical section the grain is fairly open, the hard and
soft tissue giving a mottled appearance in tangential section. The wood
is most easily worked with all tools, planes with a dull finish and
though liable to crack a little is on the whole a sound, though weak,
timber. The weight is only 32 lbs. a cubic foot.
=The Leaves= are bipinnate, 15-18 inches long, with opposite, pinnate
leaflets bearing numerous dark green pinnules, oblique, ¾ inch long,
alternate but nearly opposite towards the tip. They have a shining
surface, and the young leaf is reddish.
Public-domain text, read in full here on John Shaqi.
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