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DescriptionPerennial trailing herb, 10-80 cm tall, widely cultivated as a garden ornamental and occurring as a naturalised escape.Stems decumbent, sometimes rooting at the nodes, 4-angled, sparely hairy, often woody at the base. Leaves more or less ovate-tiangular in outline, deeply 2-3-pinnatisect; ultimate segments linear, up to 1 cm long, more or less hairy on both surfaces. Inflorescence in single terminal spikes c. 2 cm long, elongating up to 10 in fruit. Bracts green, ovate-lanceolate, half as long as the calyx. Calyx 7-9.5 mm long, tubular, densely whitish appressed hairy. Corolla mauve, lilac, purple, deep pink, purple-red or rarely white.; tube 10-11 mm long, exserted for 3-5 mm, hairy inside the throat. Lobes up to 4 × 4 mm, broadly obcordate, emarginate.