Hybanthus yucatanensis Millsp. Hybanthus yucatanensis Millsp. in Publ. Field Columbian Mus., Bot. Ser. 1(4): 404. 1898 sec. Villaseñor & al. 2013=Hybanthus cymosus Bartlett in Proc. Amer. Acad. Arts 43 (2): 56. 1907 syn. sec. The Plant List 2013