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 Fruits= are pods from 2-4 inches long and an inch broad, brown
with a paler edge, shiny, with veined surface and slightly embossed
seeds. The 1-3 seeds are round, flat, light brown and have a white
hilum, and are ⅜ inch long. The pods are persistent on the tree till
the following rains.
=Uses.=—The wood is used for axe and hoe handles, its excessive
hardness giving it the name of “kariye gatari” or “break the axe.”
Concoctions of the bark and roots are used medicinally.
[Illustration]
=AFZELIA AFRICANA= Smith.—_Kawo_. LEGUMINOSAE.
A species which is more locally than generally common and in some
forests found very evenly distributed throughout large areas. Large
timber specimens, as found in the south, are rarely met with, as the
form of the typical northern specimens is one having a short, thick
bole with a girth of 6-10 feet, large spreading limbs forming a wide,
rather flat-topped crown with dense foliage and good shade. Forty feet
is an average height for such full-grown trees. It is comparatively
rare in the extreme north, but especially common in parts of the
central and southern provinces of the north. At a distance it can be
distinguished by the brilliant green of its foliage, which, though
apparently dense, is actually very superficial and can be seen through
in somewhat the same manner as can _Chlorophora excelsa_. It attains
its full size in “kurmis” or on the slopes of well-watered hills.
=The Bark= is grey and flakes off in large, uneven-edged scales which
leave distinctive, light patches. The slash is pale red and of a
crumbling composition.
=The Wood=, when freshly cut is a light brown with distinct orange
tint, which always remains, even when the timber has darkened to the
deep red brown after seasoning. The sapwood is white or yellowish,
generally the latter, the orange of the pores enhancing this. In
transverse section the rings are indistinctly marked, but the soft
tissue, in unusual quantities, is clearly seen, as are the pores,
which are large, rather far apart, some single, or in small nests,
or in lines. The rays, not visible to the naked eye, are continuous
and regularly spaced, readily visible in radial section. The grain is
inclined to pick up in bands, it being by no means an easy wood to work
with, but the resulting finish is well worth the trouble required. It
is hard, durable and strong, and weighs from 55-60 lbs. a cubic foot.
=The Leaves= are pinnate, about a foot long with 6-8 pairs of opposite,
shiny, dark-green leaflets, 3½ inches long and 2½ inches broad. They
are a most brilliant green when new.
=The Flowers= are in stiff, flat panicles and appear in March.
Each flower has four dark-green cupped sepals, one long petal,
cream-coloured with red lines, seven fertile stamens, two infertile
stamens and a long, dark-green style.
Public-domain text, read in full here on John Shaqi.
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