Much-branched perennial shrub, 1 - 1.5m. high. Stems quadrangular, pubescent,woody at the base. Leaves opposite apiculate, pubescent on both surfaces; marginscoarsely toothed. Inflorescence axillary or terminal in simple or branched whorledraceme; flowers white. Nutlets subglobose, rugose. All parts of the plant are stronglyscented (Vietnam)