Mill, R. R. “REVISION OF THE LIMITS OF PEDICULARIS SERIES MEGALANTHAE (PRAIN) BONATI (OROBANCHACEAE)”. Edinburgh Journal of Botany 68, no. 1 (March 3, 2011): 111–138. Accessed September 15, 2026. https://journals.rbge.org.uk/ejb/article/view/1418.