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 Wood= has a dirty white ground colour with a well-marked reddish
grain in bands and streaks, with dark brown patches. In transverse
section the pores are small, not very numerous, evenly distributed,
mostly single with a few double pores and small nests, in oblique
rows, the soft tissue very poorly developed as fine lines imperfectly
connecting the pores. The rays are fine, closely and regularly spaced
and fairly straight, and they show as light-reflecting bands in radial
section, and as a fine stippling in tangential section. The wood is
soft, coarse-grained, sawing roughly and picking up, often full of
small knots and liable to small borer-beetle attacks. It is fairly
durable if well seasoned and weighs 36 lbs. a cubic foot. Good sizes
are obtainable.
=The Leaves= are pinnate, some 9 inches long with 8-9 pairs and
a terminal leaflet, rounded, with the venation much branched and
prominent on both sides. They are bluish-green with a slight bloom and
tend to fold up along the mid-rib.
=The Flowers= appear from January to April and even in May in the
extreme north, on small, 2-3 inch long, erect spikes on the leafless
twigs. They are slightly scented. Each has 4 small red sepals, 4 petals
recurved, green with red tips, 16 yellow stamens and a red pistil. Each
flower is in the axil of a small, red bract.
=The Fruits= ripen from April to June and are light yellow or pale
green plums 1½ inches in diameter, with a tough skin and a juicy,
mucilaginous flesh which is with difficulty separated from the rough
stone.
=Uses.=—The wood is greatly in demand for mortars. The fruit is eaten
fresh but its amenability is increased by stewing, the flesh being full
of fibres attached to the stone.
[Illustration]
=SECURIDACA LONGIPEDUNCULATA= Fres.—_Uwar magunguna, Sainya_.
POLYGALACEAE.
This common shrub or small tree is very familiar in open bush and scrub
country, growing in the driest localities up to the extreme north of
the country. As generally met with it is a small, erect and delicate
shrub, some 12-15 feet high, but trees up to 25 or 30 feet are not
uncommon, especially in Sokoto province, where a girth of 3 feet is
attained. It is readily distinguished by its flowers and by its seeds,
and the slender, erect branches are distinctive. It is common amongst
the broken rocks of the Bauchi Plateau.
=The Bark= is fairly smooth and light brown, yellowish or grey, with
very small dark-coloured scales at certain times. The slash is yellow.
=The Wood= is light yellow in colour and the annual rings are very
distinctively marked in dark brown, the dry wood parting at these rings
into a series of concentric cylinders. Weight 55 lbs. a cubic foot.
=The Leaves= are small and elliptical in shape, about 2½ inches or less
in length, and under ½ inch wide. They are a light grey-green on both
surfaces and are set spirally round the long twigs, erect and nearly
parallel with the twig.
Public-domain text, read in full here on John Shaqi.
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