*Verbena bonariensis L.bonariensis

Spikes sub-cylindrical. Peduncles without glandular hairs. Corolla tube rarely twice as long as calyx. Stems scabrous pubescent. Leaves ovate-lanceolate. Perennial or annual herb to 2 m high. Widespread. Weed of cultivation and waste places. Introd. from S. America. Fl. spring–autumn. Purple Top