Verbena hastata, commonly known as the American vervain, blue vervain, simpler's joy, or swamp verbena, is a perennial flowering plant in the vervain family, Verbenaceae. It grows throughout the continental United States and in much of southern Canada. V.hastata grows as a stiffly erect stem, occasionally branching in the upper half, reaching up to 1.5 metres (5 feet) tall. The stems are four-angled (square), hairy, and green to reddish in color. Leaves are opposite, simple, and measure up to 15 centimetres (6 inches) long and 3 centimetres (1 inch) across. This photograph, which was focus-stacked from 50 separate images, shows a V.hastata inflorescence.Photograph credit: Dominicus Johannes BergsmaRecently featured: DetourFlame-faced tanagerSpaceX CRS-20ArchiveMore featured pictures