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Brachystelma dimorphum subsp. dimorphum

Scientific Name
Brachystelma dimorphum R.A.Dyer subsp. dimorphum
Higher Classification
National Status
Status and Criteria
Vulnerable B2ab(iii,v)
Assessment Date
N. Hahn & L. von Staden
A widespread (EOO 22 158 km²), but localized habitat specialist (AOO estimated to be <2000 km²). It is known from fewer than 10 locations, but might be overlooked. It is suspected to be declining due to ongoing loss and degradation of its habitat.
South African endemic
Provincial distribution
Free State, Northern Cape, North West
Kimberley to Vryburg and Bloemfontein.
Habitat and Ecology
Major system
Major habitats
Southern Kalahari Salt Pans, Highveld Salt Pans, Winburg Grassy Shrubland, Kimberley Thornveld
Alluvial soils and large, shallow pans in grassland.
This taxon is threatened across its range by ongoing habitat loss and degradation, particularly agricultural expansion on alluvial soils, as well as spreading settlements, mining, alien invasive plants and degradation due to overgrazing.

This taxon is known from only five collections, scattered over a wide area, and was last recorded in 1971. It is possibly localized to salt pans - three of the records are from areas surrounding salt pans - which may explain its rarity, areas of suitable habitat would be generally small in extent, and widely scattered. Its distribution range is however botanically very poorly sampled, and in addition, it is a cryptic species, which would make it easily overlooked (Hahn 2013). It is possibly more common, but field surveys are needed to relocate it in the wild, and to gain a better understanding of its habitat preferences, population size and status. Searches at known localities near Kimberley and in North West Province have thus far failed to relocate these subpopulations.

Population trend
Hahn, N. & von Staden, L. 2016. Brachystelma dimorphum R.A.Dyer subsp. dimorphum. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2020/04/06

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Distribution map

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