Spirolobium is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1889. It includes only one known species, Spirolobium cambodianum, native to Southeast Asia (Vietnam, Laos, Cambodia, Thailand, Malaysia, Borneo).Kew World Checklist of Selected Plant FamiliesMiddleton, D.J. (2007). Apocynaceae (subfamilies Rauvolfioideae and Apocynoideae). Flora Malesiana 18: 1-474. Noordhoff-Kolff N.V., Djakarta.Middleton, D.J. (2011). Flora of peninsular Malaysia , II, 2: 1-235. Institut Penyelidikan Perhutanan Malaysia.
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