Rustia mosenii Rustia pohliana Rustia sellowiana Exostema formosum Exostema formosum var. laeve Exostema formosum var. leprosum Cinchona formosa Cinchona formosa var. laevis Cinchona formosa var. leprosa
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024