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
A shrub or small tree, readily recognised by its stiff, spiny stems
densely covered with the small leaves. The stems spring from the base
and are either erect or finally bent out and down. Occasionally it
forms a dense shrub of large size, but usually is light and open. It
occurs as far north as 13°, and is common in open high savannah forests.
=The Bark= is light grey, sometimes almost white, with black scales
scattered about in patches.
=The Thorns= are above the leaves and are short, sharp, very strong and
woody, with bark at the base and smooth tips.
=The Leaves= are about 1½ inches long, narrow at the base, broad at the
tip, and smooth; the veins slightly raised on both surfaces. They are
borne in rosettes at the ends of very short twigs, above which is a
thorn, and densely cover the branches.
=The Flowers= spring from amongst the rosettes of leaves and may be so
numerous as to cover the twigs with a mass of bloom. They are white,
changing to yellow and are slightly scented. Each has a short-stalked
tubular calyx with 5 unequal-sized sepals with cleft tips, a tubular
corolla about ¾ inch in diameter with 5 petals, bent back, 5 stamens in
the angles between the petals, consisting of dark brown anthers only,
and a yellow, protruding, clubbed pistil. The flowers appear in May.
=The Fruits=, ripening in June, and often persisting for several
months, are oval, 5-8 inches long and ½ inch in diameter, brown, shiny,
hard, with thin “skin” vertically ribbed and cellular veined. It is
2-celled and the partition is vertical, each cell containing a number
of small black wedge-shaped seeds packed close and cemented together.
The fruit falls entire and rots.
[Illustration]
=RAPHIA VINIFERA= P. Beauv.—_Tukuruwa_. PALMACEAE.
This very common palm grows in swamps, where it forms impenetrable
thickets often of large extent. It is readily distinguished by its very
long erect leaves growing from ground level, there being no stem. It
reaches a height of over 30 feet, the girth of the base being some 8
feet. The leaves spread out from a growing centre, visible as an erect
shoot in the middle.
=The Leaves= are upwards of 30 feet in length with long leaflets whose
edges and mid-rib at the back are armed with small sharp spines. The
mid-rib is an orange colour, turning grey with age.
=The Flowers= are in a loose branched spadix up to 6 or 8 feet long,
the male and female on the same palm and on the same spadix. The males
on the lower part of the branches of the spadix have a tubular calyx, a
corolla of 3 petals, long and narrow and a number of stamens, varying
from 10-12 inside the base of the petals, attached to them. The female
flowers, situated at the end of the branches of the spadix, are larger
than the males, the calyx tubular, the corolla bell-shaped with 3 sharp
lobes, the rudiments of the stamens forming a cup attached to the
corolla and a 3-celled ovary.
Public-domain text, read in full here on John Shaqi.
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