Aston Nymphoides spinulosperma Aston Nymphoides spongiosa Aston Nymphoides stygia (J.M.Black) H.Eichler Nymphoides subacuta Aston Nymphoides triangularis Aston References Jacono, C. 2000. Know Nymphoides. Aquaphyte 22 (supplemental insert) Nymphoides minima Asterales genera