Aldama excelsa (Willd.) E.E. Schill. & Panero Aldama excelsa (Willd.) E.E. Schill. & Panero in Bot. J. Linn. Soc. 167(3): 323. 2011 sec. Villaseñor 2016≡Helianthus excelsus Willd., Sp. Pl. (ed. 4) 3: 2243. 1803 syn. sec. ???