Varronia ambigua (Schltdl. & Cham.) Borhidi Varronia ambigua (Schltdl. & Cham.) Borhidi in Acta Bot. Hung. 34 (3-4): 388. 1988 sec. Miller 2011≡Cordia ambigua Schltdl. & Cham. in Linnaea 5: 115. 1830 syn. sec. ???