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
This is perhaps the most evenly and widely distributed of all trees,
extending from the southern rain belt to the extreme north of Nigeria,
and over the border into French territory north of Sokoto, where some
of the largest examples of the northern provinces are to be found. A
height of 70 feet with girths of 6-8 feet is common. As regards the
situations most favourable to this species, level country with deep
soil and average rainfall is preferred, and considerable areas of such
country are found occupied almost entirely by it, both as full grown
trees and saplings in dense thickets. These latter are especially
valuable for the production of forked poles (gofa) for building
purposes, and are transported great distances owing to their great
durability and comparative resistance to White Ants. The species is
readily distinguished at a distance by its feathery, birch-like foliage
and drooping branches, which, at first acutely ascending, bend over and
droop in graceful curves. A light-demander, its branches are extremely
persistent on the stem and only where it is very densely grown,
preferably with an admixture of shade-bearing species, will clean boles
be found. Examples grown in the open, or suddenly freed from the forest
by the clearing for cultivation, are covered with small twigs and the
foliage extends almost to ground level. Large specimens in forest have
clean boles, generally forking at no great height, with wide-spreading,
open crowns.
=The Bark= varies according to habitat. That of specimens in dense
forest is fairly smooth with small, brown scales, but as generally seen
in the north is a very light grey with long scales which turn up at the
ends before falling, giving the tree a ragged appearance, with large,
lighter patches. A dark gum exudes from the bark, very inferior as an
adhesive as it is cloudy when made up into solution. The slash is pale
yellow with thin dark lines.
=The Wood= is a dark, dull, smoky brown, sometimes almost black, with
reddish streaks. The sapwood is grey or dirty white. In transverse
section the rings are seen as dark bands, the pores are minute and
densely distributed in small groups, chains and festoons of various
sizes, with single pores between, the soft tissue sparse and hardly
connecting the pores. The rays are extremely fine and close together.
In vertical section the grain is very fine and the pores have
glistening contents. It is a very hard wood, difficult to work with all
tools, often knotty, picking up in bands, but will polish, even on the
transverse section. The weight is 64 lbs. a cubic foot.
=The Leaves= are on long, slender, drooping twigs, and are oval,
slightly darker above than below with a silky pubescence which is most
marked in the young foliage. They tend to assume one plane. Length 2-3
inches, breadth 1 inch.
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