Within the UAE, it has been recorded from Jebel Hafeet and the Ru'us al-Jibal (Stuart and Stuart 1998, Jongbloed et al. 2003, Feulner 2011), and from the Masafi Mountains and Wadi Al Helo (Sharjah Seedbank & Herbarium; S. Gairola pers. comm. 2019), with the main concentrations recorded on Jebel Hafeet and in Ra's al-Khaimah (Western 1989). G.R Feulner noted that he has not collected this species in the UAE (in litt, MEW 2010) and has not distinguished it in the field from H. lippii (Feulner 2011). In Oman, it is considered to occur at relatively high altitudes, to 1,850 m asl (Patzelt 2015). This species is native to northern Africa and the Arabian Peninsula (Board of Trustees, RBG Kew 2019).

In the UAE, this species is widespread along both coasts and inland in the northern emirates, although absent from the Hajar Mountains (Jongbloed et al. 2003). It also occurs on offshore islands (Jongbloed et al. 2003, Sakkir et al. 2017). The global range of this species is from Cape Verde, through Africa (Sahara to Tanzania, Angola to southern Africa), the Arabian Peninsula, to India (Board of Trustees, RBG Kew 2019).

This species is known from an unconfirmed herbarium specimen from Abu Dhabi Emirate (S. Sakkir pers. comm. 2019). It is expected to occur in the UAE, although the presence of the species within the country is currently not certain (S. Ghazanfar pers. comm. 2019). The global range of this species is from Spain, across the north and north-east of Africa, through the Arabian Peninsula (Saudi Arabia, Yemen, and Oman), and the eastern Mediterranean region (Board of Trustees, RBG Kew 2019).

According to Jongbloed et al. (2003), the species is found in sandy desert of Dubai and Sharjah emirates and along the east coast. The global range of this species is across northern Africa, through the Arabian Peninsula to Central Asia (Board of Trustees, RBG Kew 2019). The draft Red Data Book (MEW 2010) considered that all material identified as T. macropterus is referable to T. pentandrus. However, T. macropterus Boiss is currently maintained as a valid taxon by Plants of the World Online (Board of Trustees, RBG Kew 2019) and the African Plant Database (APD 2019).

In the UAE, this species is found in the eastern emirates, from Jebel Hafeet north along the western foothills and adjacent plains of the Hajar Mountains (Jongbloed et al. 2003). The global range of this species is through the Arabian Peninsula (Board of Trustees, RBG Kew 2019).

Within the UAE, this species is reported as widespread in the Hajar Mountains and adjoining plains (Jongbloed et al. 2003). The species occurs as an occasional at lower altitudes in the Ru'us al-Jibal, with the identity of records from higher altitudes, both there and in the Hajar Mountains, requiring confirmation, as they may refer to F. schimperi (Feulner 2011). The global range of this species is across western, northern, and northeastern parts of Africa, through the Arabian Peninsula, to India (Board of Trustees, RBG Kew 2019).

The species has been described from the northern Hajar Mountains in addition to the Ru'us al-Jibal (Jongbloed et al. 2003). It is possible that this species used to be cultivated and has now become generally established within the mountains (Ghazanfar 2007). This plant exists at altitudes above c. 1100 m in the Ru'us al-Jibal, but is typically found at medium elevations in the Hajar Mountains (Feulner 2011). Its native range is from Europe to the Arabian peninsula and temperate Asia (Board of Trustees, RBG Kew 2019).

In the UAE it is generally widespread across the country, particularly in sandy deserts except for the far western and Liwa regions (Jongbloed et al. 2003). In addition, it also occurs along the East coast of the UAE (Jongbloed et al. 2003). Globally, the native range of this species spans from the Sahara to Pakistan (Board of Trustees, RBG Kew 2019).

Within the UAE, it has been recorded from Wadi Ashwani, Jebel Hafeet and Jebel Qitab in the Olive Highlands (Jongbloed et al. 2003, Feulner 2014). It is considered to be widespread throughout the western Hajar Mountains (Feulner 2014). Globally, the native range of this species spans from the Sahara to India (Board of Trustees, RBG Kew 2019).

Within the UAE, it is known to occur within the Hajar Mountains, including the biodiverse Olive Highlands (Feulner 2014). It is also recorded from the Ru'us a-Jibal at elevations up to 1750 m (Feulner 2011). Globally, the native range of this species spans from the Canary Islands, southern Mediterranean and northern Africa to Somalia and Pakistan (Board of Trustees, RBG Kew 2019).