Alternanthera flava (L.) Mears Alternanthera flava (L.) Mears in Taxon 29: 88. 1980 sec. Sánchez-Del Pino & al. 1999=Alternanthera gracilis (M. Martens & Galeotti) Loes. in Repert. Spec. Nov. Regni Veg. 16: 202. 1919 syn. sec. Sánchez-Del Pino & al. 1999