Common camas is an herbaceous perennial reaching 70 cm. It has several basal, grass-like leaves 2 cm wide and 50 cm long. The flowers are usually deep blue, occasionally white, 3-4 cm wide, and usually 5 or more in a terminal spike. Common camas is abundant in grassy slopes and meadows in rather dry sites at low to middle elevations. It is largely restricted to sites influenced by rainshadows (the San Juan Islands and southern Puget Sound in western Washington) and is often associated with Garry oaks.