Richardia L. Richardia L., Sp. Pl. 1: 330. 1753 sec. Stevens 2001=Richardsonia Kunth in Mém. Mus. Hist. Nat. 4: 430. 1818 syn. sec. Stevens 2001=Schiedea Bartl., Ord. Nat. Pl.: 210. 1830, nom. illeg., syn. sec. Stevens 2001