Rhigozum trichotomum (SA Tree List No. 676.1), the driedoring in Afrikaans, is included in the Tree List, probably because the plant is woody and there are other Rhigozum tree species. It usually grows to shrub size only, seldom exceeding 2 m.
The distribution area of the driedoring is arid land. It lies inland in the north-west of South African, particularly Namaqualand and the Kalahari. Driedoring also grows in Namibia and Botswana. These parts are prone to extreme temperatures and low rainfall.
Poor veld management over many years, generations actually, has rendered vast tracts of grazing veld in the distribution area nearly useless. The driedoring and other invaders have been encroaching, thus replacing the more suitable Karoo scrub species that meet nutritional requirements for the farming of livestock. This reduced the carrying capacity of affected veld and made the driedoring unloved by farmers.
Thus a plant may become the innocent scapegoat for the mistakes of others. Correcting this kind of error is too often beyond the scope of available budgets and the timeframes of generations (Coates Palgrave, 2002; Shearing, 1994).