Western (1991) considered this species to mostly occur in the Western Region bordering Qatar and Saudi Arabia, whilst MEW (2010) considered the species to be widespread along the Arabian Gulf coast and on sandy and gravelly plains in the northern Emirates. Jongbloed et al. (2003) show a coastal distribution in western and central areas, but extending inland to Jebel Hafeet and east to the east coast of the UAE. According to comments from the UAE National Red List Workshop (15^th-19^th September 2019, Dubai), here, we consider T. qatarensis to have a coastal distribution in addition to being a separate species to T. mandavillei and T. hamiensis. The species has been recorded for Jebel Hafeet (Stuart and Stuart 1998), however Brown et al. (2007) considered the subpopulation there to be distinct, as Zygophyllum cf. migahadii; Feulner (2014) considered the species present on Jebel Hafeet to be T. migahadii, but T. qatarensis to be present to the base of the mountain. Alzahrani and Albokhari (2017, 2018) give the global distribution as Saudi Arabia (eastern region and north-central areas), Qatar, Kuwait, Bahrain, United Arab Emirates, Oman, Socotra, Yemen and Iraq.