le Roux, M. M. ., & Manning, J. (2014). A new long-tubed subspecies of Pelargonium dipetalum (section Hoarea) (Geraniaceae) from the Albertinia-Swellendam area in Western Cape. African Biodiversity & Conservation, 44(1). Retrieved from https://www.abcjournal.org/index.php/abc/article/view/182