Some authors consider the species to be a sub-species of Acacia raddiana, others consider it a separate species on account of it's markedly different shape. (The branches of A. tortilis separate at or near ground level and spread to a flat top, while A. raddiana has a distinct thick trunk and an overall round foliage.) The habitat of the two overlap, but A. raddiana is the more numerous in the central Libyan Desert.

Wadi Hamra (Gilf Kebir), 2004/2005

Eastern Wadi Abd el Melik (Gilf Kebir), October 2004		Wadi Abd el Melik (Gilf Kebir), March 2007 (with Maerua crassifolia)

Wadi Wahesh (Jebel Uweinat), 2004/2005

Basin in upper section of Wadi Handal (Jebel Uweinat), October 2006

Jebel Arkenu (upper main wadi), October 2003