Umbrella thorn (Acacia tortilis)
This species has yet to be assessed by the IUCN. Subspecies: A.t. heteracantha classified as Least Concern (LC) on the Interim Red Data List of South African Plant Taxa (2), A.t. raddiana, A.t. spirocarpa and A.t. tortilis (1).
Information on the umbrella thorn is currently being researched and written and will appear here shortly.
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- Subspecies: a population usually restricted to a geographical area that differs from other populations of the same species, but not to the extent of being classified as a separate species.
Species 2000 ITIS Catalogue of Life (August, 2009)
Threatened Species Programme. (2009) Interim Red Data List of South African Plant Taxa. South African National Biodiversity Institute, Pretoria, South Africa. Available at: