Several species have been coined using the name Hessea, which refer to species now considered better suited to genera Namaquanula, Nerine or Strumaria:
^Goldblatt, P. & J. C. Manning. 2000. Cape Plants: A Conspectus of the Cape Flora of South Africa. Strelitzia 9.
^Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).