Rhytachne guianensis (Hitchc.) Clayton Rhytachne guianensis (Hitchc.) Clayton in Kew Bull. 20: 262. 1966 sec. Dávila & al. 2018≡Manisuris guianensis Hitchc. in Contr. U.S. Natl. Herb. 22: 510-512, f. 86. 1922 syn. sec. Dávila & al. 2006