Romanschulzia O.E. Schulz Romanschulzia O.E. Schulz in Bot. Jahrb. Syst. 66(1): 99. 1933 sec. Al Shehbaz 2012=Lexarzanthe Diego & Calderón in Acta Bot. Mex. 68: 74. 2004 syn. sec. Al Shehbaz 2012