This name has taxonomic issues:

Tropicos: 

https://www.tropicos.org/name/13800144

Has these as accepted names:

Chelonanthus alatus (Aubl.) Pulle

Lisianthius alatus Aubl.

Kew:

http://www.plantsoftheworldonline.org/?q=Chelonanthus%20acutangulus

Has this as the accepted the:

Helia acutangula (Ruiz & Pav.) Kuntze