Juncus ensifolius
 Juncus ensifolius is a species of rush known by the common name swordleaf rush. It is native to much of western North America from Alaska to central Mexico and into eastern Canada. It is present in Japan and far eastern Russia and it has been introduced to many other regions of the world including Europe New Zealand and Australia. It is a plant of wet areas in many types of habitat. This is a rhizomatous perennial herb forming clumps of stems 20 to 60 centimeters tall.