Cypselea in Ann. Mus. Natl. Hist. Nat. 7: 219. 1806 sec. Hartmann (2001a)
- ≡Radiana, Specchio Sci. 1: 88. 1814 syn. sec. Hartmann (1993)
- –Millegrana in Ann. Mus. Natl. Hist. Nat. 7: 220. 1806, nom. nud., syn. sec. Hartmann (1993)
Cypselea includes three species (Hartmann 2011a) and is nested within Sesuvium (Bohley & al. 2015; Hassan & al. 2005; Thulin & al. 2012). Two of the species are endemic to Paraguay and Cuba, respectively (Hartmann 2011a).