Orbea is a genus of flowering plants of the family Apocynaceae, first described as a genus in 1812.Haworth, Adrian Hardy. 1812. Synopsis plantarum succulentarum 37. It is native to AfricaGibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).Leach, Leslie Charles. 1975. Kirkia 10(1): 289-291. and the Arabian Peninsula.
Species Species accepted by the Plants of the World Online as of February 2023:
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