Tibouchina Aubl. Tibouchina Aubl., Hist. Pl. Guiane 1: 445-446, pl. 177. 1775 sec. Clausing & Renner 2001=Chaetogastra DC., Prodr. 3: 131. 1828 syn. sec. ???=Oreocosmus Naudin in Ann. Sci. Nat., Bot., sér. 3, 13(1): 37. 1850 syn. sec. ???