藿香蓟Ageratum×houstonianum菊科、藿香蓟属。原产南美墨西哥。多年生草本,作一、二年生栽培,株高30～50厘米,整株被毛。茎松散,直立性不强,节问易生根,基部木质化。叶对生,卵圆形,有锯齿,叶面皱折。头状花序,半球形,全为筒状花,呈缨状,花色主要为蓝色、淡紫、也有白或淡紫红;花期7月至霜降或4-5月。常作花坛、盆花应用。 Ageratum × houstonianum Compositae, Ageratum. Native South America Mexico. Perennial herb, for one or two years of cultivation, plant height of 30 to 50 cm, the entire coat. Stalks loose, upright is not strong, easy to root section asked root, the Ministry of lignification. Leaves opposite, ovoid, serrate, leaf folds. Capitulum, hemispherical, all tubular flowers, was tassels, mainly blue, purple, white or lavender; flowering in July to the frost or 4-5 months. Often used for flower beds, potted flowers.