Phaliso, N., Mckenzie, R.J., Netnou-Nkoana, N.C., Karis, P.O. and Barker, N.P. 2016.

Reassessing taxonomic relationships in the Berkheya clade (Asteraceae, Arctotideae–Gorteriinae): the utility of achene morphology

. Phytotaxa. 246, 1 (Feb. 2016), 1–22. DOI:https://doi.org/10.11646/phytotaxa.246.1.1.