Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Verbena hastata - Blue Vervain redirects here. This name is also used for Common Vervain (V. officinalis).Verbena hastata (blue vervain or swamp verbena) is a flowering plant in the vervain family Verbenaceae. It is a herb with opposite simple leaves which have double-serate margins borne on stiffly erect branching square stems. The flowers appear in summer and are purple. This is a common plant that occurs across North America.
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Plant