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= are in close panicled racemes at the branch tips from
March to June. Each flower is 4 inches long over all, being enclosed at
first in a pair of long, pale green, velvety bracteoles which separate
and fall back to release the flower parts. The calyx is a slender tube
divided into five long, narrow pointed, recurved sepals. The corolla
has four small, linear petals and one erect white, wrinkled, cleft
petal 2 inches long and broad, with a green centre splash. There are
ten long, erect, hairy stamens with brown-green anthers, and a long
pistil. The flowers are in such masses as to be conspicuous from a
great distance.
=The Fruit= is a broad, flat, dark brown, velvety pod, 6-10 inches long
and 2-2½ inches broad. It explodes when ripe to release some 3-5 round,
flattened seeds.
[Illustration]
=BOMBAX BUONOPOZENSE= Beauv.—_Kuriya, Gurjiya_. MALVACEAE.
This tree is known as the Red-Flowered Silk Cotton Tree and grows, on
an average, to a height of 40 feet with a girth of about 5 feet. Very
much larger specimens are, however, to be seen, up to 70 feet high
with girths of 15 feet and more. Rounded root-flanges are prominent
on the large trees. The crown is regular and umbrella-shaped, rather
flat-topped, wide-spreading and open with superficial foliage giving
little shade. In old specimens the bole is gnarled and the limbs much
bent, the shape of the crown being often retained by the growth of the
smaller branches. The species is not at all exacting as regards soil
and is, in fact, commonly found on hillsides and amongst rocks where
its roots penetrate the little but good soil. It is more local than
general in its distribution.
=The Bark= of the younger trees is very corky, longitudinally fissured
and horizontally cut into prominently spiked scales. The degree of
roughness is very variable, being generally far more marked, relatively
on younger trees, and, in the older ones, the thorns being confined to
the branches, the bole having prominent layered corky scales with soft
ends. Some quite small trees bear no thorns at all, but this is rare.
The spines are conical, with broad corky bases and sharp black points.
If a piece of the bark be snapped off it shows a light red colour. The
slash is crimson.
=The Wood= is a dirty white colour. In transverse section the pores
are large, widely scattered, single, twin or nests. The rays vary in
width and in spacing very considerably, and are straight, showing
as long, light-reflecting bands in radial, and as brown flecks in
tangential section. In the latter section the pores are brown, open
and wavy. It is a very soft and light wood, easily worked, not strong,
its durability largely dependant on the manner in which it has been
seasoned, with exclusion of damp and consequent mould. It is very
subject to small borer beetles. The weight is only 20 lbs. a cubic foot.
Public-domain text, read in full here on John Shaqi.
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