Classification of the genus Acacia (in the wider sense) has been subject to considerable debate. It is generally agreed that there are valid reasons for breaking it up into several distinct genera, but there has been disagreement over the way this should be done. As of 2017, it is widely (but not completely) accepted that the section that includes the majority of the Australian species should retain the name Acacia, whilst other sections of the genus should be transferred to other genera. This species is transferred to Vachellia[
Acacia kirkii Oliv.
Acacia nilotica kirkii (Oliv.) Roberty
Acacia harmsiana Dinter
Acacia verrucifera Harms
Vachellia kirkii is a multi-stemmed shrub ot a tree with a spreading, flat-topped crown; it can grow from 2.5 - 15 metres tall, occasionally reaching 18 metres[
The plant is harvested from the wild for local use as a food, medicine and source of materials.
Especially in times of drought, many Acacia species can concentrate high levels of the toxin Hydrogen cyanide in their foliage, making them dangerous for herbivores to eat.
Tropical Africa - Guinea, Mali, DR Congo, Uganda, Kenya, Burundi, Rwanda, Tanzania, Angola, Zambia, Zimbabwe
Woodland, wooded grassland, mixed scrub; often in seasonally flooded alluvium by rivers and lakes, riverine or ground-water forest, swamp-forest; on nutrient-rich, silty kaolinitic clay to black cracking clays; at elevations to 1,980 metres[
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This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby.
The bark is aromatic and is used by the WaMasai for making tea[
Roots are used as a medicine for treating stomach diseases[
The bark of all Acacia species contains greater or lesser quantities of tannins and are astringent. Astringents are often used medicinally - taken internally, for example. they are used in the treatment of diarrhoea and dysentery, and can also be helpful in cases of internal bleeding. Applied externally, often as a wash, they are used to treat wounds and other skin problems, haemorrhoids, perspiring feet, some eye problems, as a mouth wash etc[
Many Acacia trees also yield greater or lesser quantities of a gum from the trunk and stems. This is sometimes taken internally in the treatment of diarrhoea and haemorrhoids[
A gum exudes from the trunk and branches[
The wood is not durable. It is used for firewood and for construction of cattle and farm enclosures[
The seed of most, if not all, members of this genus has a hard seedcoat and may benefit from scarification before sowing to speed up germination. This can usually be done by pouring a small amount of nearly boiling water on the seeds (being careful not to cook them!) and then soaking them for 12 - 24 hours in warm water. By this time they should have imbibed moisture and swollen - if they have not, then carefully make a nick in the seedcoat (being careful not to damage the embryo) and soak for a further 12 hours before sowing.
Acacia seeds that have matured fully on the bush and have been properly dried have a hard seed coat and can be stored in closed containers without deterioration for 5 - 10 years or more in dry conditions at ambient temperatures. It is best to remove the aril, which attracts weevils and can lead to moulds forming. The arils are easilyremoved by placing the seeds in water and rubbing them between the hands, then drying the seeds and winnowing them[
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