Bursera palmeri S. Watson Bursera palmeri S. Watson in Proc. Amer. Acad. Arts. 22(2): 402-403. 1887 sec. Rzedowski & al. 2005=Elaphrium queretarense Rose, North Am. Fl. 25: 254. 1911 syn. sec. Rzedowski & al. 2005