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 Flowers= appear in March and April, mostly at the base of the
new leaf shoot, a few only amongst the leaves higher up. They are
in spikes or panicles up to 12 inches long, numerous, pendulous and
conspicuous. The small white flowers are crowded and each consists of
a minute calyx, 5 white petals which bend back in half, concealing the
tips, 10 yellow-anthered stamens and a short blunt, curved pistil. The
pentagonal shape of the corolla with its recurved petals and the erect
stamens are noticeable. There is no scent.
=The Fruits= are pods, 2 inches long, 1 inch broad, thin, not flat, but
tending to twist at the tip, forming a convex and concave side on the
latter, of which the seed is clearly embossed. The colour is mahogany
brown, veined, brittle and persistent. There is one brown, oval flat
seed.
[Illustration]
=BUTYROSPERMUM PARKII= Kotschy.—_Kadanya, Kadai_. “_Shea Butter Tree_.”
SAPOTACEAE.
This is one of the commonest species of the savannah forests and has a
wide distribution. An average tree is about 30 feet high with a girth
of 4-5 feet, though large specimens over 40 feet high with a girth of
10 feet are by no means infrequent. A short, stout bole and large,
spreading limbs, gnarled and crooked, form a widely spreading crown
of considerable density, which, from the drooping habit of the lower
branches, reaches almost to the ground in many specimens. It is the
type species of the tree savannah and in some parts of the country
forms a large percentage of the forests.
=The Bark= is a distinguishing feature of the species and is dark grey,
sometimes almost black, sometimes, particularly in the case of trees
growing in barren situations, almost white. It has deep, vertical
fissures and prominent, square scales of great thickness. The rough
scaling extends to the quite small branches. A milky sap exudes from
the crimson slash and from the leaf-stalks and twigs, when broken.
=The Wood= is a deep, dull red-brown with a purple tinge, the sapwood
is pinkish. In transverse section the rings are indistinct lines and
bands of dark and light tissue, the pores are small and in little rows
between the fine rays, bands of soft tissue running in concentric lines
and also connecting the chains of pores. The wood is extremely hard and
heavy, difficult to saw and very hard to plane, the resulting finish
being hard and taking a high polish. The grain picks up in part and the
wood is liable to crack when dried. The weight is 80 lbs. a cubic foot.
=The Leaves= are strap-like, of an average length of 9-10 inches and a
width of 2 inches; 3-4 inches of the length are occupied by the stalk
and the veining is strong, these two features and the darker colour
distinguishing this species from _Lophira alata_ which it superficially
resembles. The springing of the leaves from the end 2 inches of the
twigs gives the idea of a rosette. The margin of the leaf is waved.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account