A.M.Venter, ?S. African J. Bot. 69(4): 476 (-479; figs.). 2003?, 2003.

A.M.Venter, ?S. African J. Bot. 69(2): 161 (2003).?, 2003.

A.M.Venter, ?S. African J. Bot. 73(2): 214 (-217; figs. 1-4). 2007 [Apr 2007]?, 2007.