"Soft Rush" redirects here. In inland North America, this usually refers to Interior Rush (J. interior)."Common Rush" redirects here.Soft rush or common rush (Juncus effusus) is a perennial, herbaceous flowering plant species in the family Juncaceae. It is nearly cosmopolitan, considered native in Europe, Asia, Africa, North America, and South America, and naturalized in Australia, Madagascar, and various oceanic islands.