Mill, R. R. “Notes Relating to the Flora of Bhutan: XXXII. Boraginaceae, II. New Taxa, Combinations and Lectotypifications in Subfamily Boraginoideae”. Edinburgh Journal of Botany 53, no. 1 (April 26, 2010): 113–125. Accessed September 15, 2026. https://journals.rbge.org.uk/ejb/article/view/745.