O. A.  Llewellyn, Hall, M., Miller, A. G., Al-Abbasi, T. M., Al-Wetaid, A. H., Al-Harbi, R. J., and Al-Shammari, K. F., ?IMPORTANT PLANT AREAS IN THE ARABIAN PENINSULA: 4. JABAL AJA'?, Edinburgh Journal of BotanyEdinburgh Journal of Botany, vol. 68, p. 199, 2011.