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 6-9 inches long, hard, flat, dark-brown, straight
or contorted into strange shapes, 2 inches broad and ¼-½ inch thick.
They are persistent on the tree for many months, a most disfiguring
feature, and drop entire, rotting on the ground. They are very liable
to attacks from a grub which destroys the seeds. These are small,
brown, oval and scattered about in the mealy endocarp which has an
objectionable smell.
=Uses.=—The wood is used for axe and hoe handles of all sorts. The bark
is used for binding and tying but is not plaited or twisted into ropes.
Cattle eat the pods.
[Illustration]
=BAUHINIA RUFESCENS= Lam.—_Jirga, Tsatsagi, Matsagi_. LEGUMINOSAE.
A small tree, typically inhabiting annually inundated areas but also
flourishing in sandy soils of poor quality. It forms, with its numerous
much branched stems, a small thicket of one or more trees; it is
difficult to say how many under the circumstances, as one root-stock
will produce a number at ground level, forming an impenetrable mass. It
can be distinguished readily by the typical leaves of the genus, and
the small size of these compared with other species. The fact that it
is always in flower and fruit will identify it also.
=The Bark= is a light ash-coloured grey, smooth and covered with small,
brown horizontal lenticels. Old stems bear at the base small dark
scales and the bark is fissured giving it a speckled appearance. The
slash is pink and reveals the very fibrous nature of the bark.
=The Thorns= are modified twigs whose tips are strongly pointed. They
may support leafy shoots or bear leaves themselves and are seen best on
the long, slender shoots and drooping twigs. They extend their growth
indefinitely, but on the older wood may be seen as bare, woody spines 3
or 4 inches long, curved out and down.
=The Wood= is a dull, smoke-brown colour. In transverse section the
rings are indistinct dark lines; the pores are numerous and unevenly
distributed, single in small groups or in short chains, the rays
invisible to the unaided eye but showing as small bands in radial
section, which reflect the light. In vertical section the grain is
close and there are darker bands of colour. The wood is not hard, is
easily sawn and planes to a nice, soft, smooth finish though it picks
up in places with the long soft fibres. The weight is 50 lbs. a cubic
foot.
=The Leaves= are borne spirally round the branches, often in the thorn
axils or on the thorns themselves, or on twigs bare of thorns. They are
bifoliate, typical of the genus, rarely over an inch long and mostly
a ½ inch, the terminal leaf of a new shoot often being much larger.
The mid-rib is extended between the leaflets which are divided to
the base and there are three main nerves to each leaflet. They are a
light, blue-green or grey-green, with a bloom and are partly sensitive,
closing up rapidly after being plucked.
Public-domain text, read in full here on John Shaqi.
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