Struthanthus haenkei (C. Presl) Engl. Struthanthus haenkei (C. Presl) Engl., Nat. Pflanzenfam. Nachtr. 1: 134. 1897 sec. Kuijt 2009≡Spirostylis haenkei C. Presl, Syst. Veg. 7(1): 163–164. 1829 syn. sec. The Plant List 2013