Template:Paton & al., 2013
- Timberlake, J.R. & Martins, E.S. (eds.); Paton, A.J., Bramley, G.L.C., Ryding, P.O., Polhill, R.M., Harvey, Y.B., Iwarsson, M., Otieno, D.F., Balkwill, K., Phillipson, P.B., Harley, R.M. & Willis, F. (authors) 2013. Flora Zambesiaca: Mozambique, Malawi, Zambia, Zimbabwe, Botswana. Volume 8 part 8: Labiatae, Pogostemonoideae to Nepetoideae Tribe Mentheae. 346 pp., Royal Botanic Gardens, Kew, London. ISBN 978-1-84246-196-9.