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 borne on 3-inch stalks in the leaf axils from
February to June. Each stalk has a pair of bracts in the middle, or
nearer the head of flowers. These flower-heads are spherical, 1-1¼
inches in diameter, greenish and perfumed. Each separate flower is
tubular, with a short 5-lobed calyx, a long tubular 5-lobed corolla, 5
stamens inserted on the corolla throat and a long, knobbed pistil. The
corolla tube is pinkish, the tips of the lobes mauve, and the calyx is
green, red inside at the base.
=The Fruits= are in spherical heads, greatly resembling those of
_Mitragyne africana_. Each is a small capsule which parts down the
middle into two cocci which contain a number of minute seeds, winged at
both ends.
=Uses.=—The timber is suitable for all kinds of furniture and joinery
work.
[Illustration]
=AFRORMOSIA LAXIFLORA= Harms.—_Makarfo, Kariye gatari_. LEGUMINOSAE.
A small or medium-sized tree very common in bush or tree savannah,
averaging 30 feet in height, but attaining 50 feet, with girths of 3-6
feet. The bole, though frequently of good length, is rarely straight,
in fact it is a characteristic of this species that the bole is bent
and twisted and that the branches show this feature to the tips. It is
like a large edition of _Stereospermum Kunthianum_ (Sansame). The crown
is high, rounded and open, giving little shade. The bark is the most
ready means of identification.
=The Bark= is all colours, grey, green, bluish and brown in patches,
the large scales falling entire like those of the plane tree and
leaving deeply indented scars which gradually change colour. The slash
is a rich yellow with a thin green bark edging.
=The Wood= is very dark brown. In transverse section the rings are
clearly marked dark lines of varied width, rarely circular. The pores
are small, in chains and festoons connected by soft tissue which
shows as flecks in the dark hard tissue. The rays are fine and almost
straight, invisible to the unaided eye and visible as short light bands
in radial section, in which section the grain is banded and straight.
In tangential section the grain is mottled, almost figured. The wood
is hard, not easy to saw or plane but capable of being worked up to a
rather oily finish which takes a polish. It has a not unpleasant smell.
In seasoning it has been noticed that numerous radial and concentric
cracks occurred but that these closed up and became quite invisible
even under a lens. The weight is 50 lbs. a cubic foot.
=The Leaves= are pinnate, 9 inches long with an average of 11 alternate
leaflets which are oval, slightly cleft, 2 inches long and 1 inch
broad, increasing in size upwards, with shiny surface and short stout
stalks.
=The Flowers= are in small racemes amongst the leaves at the twig
ends. They are inconspicuous and appear from May to July. Each has 4
green sepals, 5 greenish-white petals, 10 stamens in the keel, not all
fertile and a prominent, flattened pistil. They are ½ inch long.
Public-domain text, read in full here on John Shaqi.
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