Psychotria hawaiiensis var. molokaiensis Psychotria hawaiiensis var. rotundifolia Psychotria mauiensis var. subcordata Straussia hillebrandii var. molokaiensis Straussia hillebrandii var. rotundifolia Straussia oncocarpa Straussia hillebrandii var. subcordata
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024