N. Phaliso

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

N. Barker, N. Netnou-Nkoana, R. McKenzie, 2016 .

A systematic study of Berkheya and allies (Compositae)

N. Phaliso, 2013 .