Physostegia is a genus of flowering plants in the family Lamiaceae, native to eastern North America. They are erect rhizomatous herbaceous perennials inhabiting damp, sunny places. They grow up to 2 m (7 ft) tall with purple or pink tubular flowers in racemes in summer.
It is suggested that it is a wholly North American genus of 12 species. Physostegia virginiana is the most common of these species, and is known as "obedient plant".