Desmodium arizonicum S. Watson Desmodium arizonicum S. Watson in Proc. Amer. Acad. Arts 20: 363. 1885 sec. Ulloa Ulloa & al. 2018=Meibomia arizonica (S. Watson) Vail in Bull. Torrey Bot. Club 19(4): 117. 1892 syn. sec. Tropicos 2013