Juncus is a member of the rush family.   This variety is known as the corkscrew rush.  It is cool season, clump forming , and loves lots of moisture!  There is a large specimen at Thompson Rivers University in Kamloops.


Juncus effusus 'Spiralis'     leaves are dark green, round, spiralling up and out from the crown, to 18" tall     flowers are brown, forming part way along the stem     zone 4     requires moist soil, good along waters' edge     also does very well in a pot partly submersed in a pond (do not let the crown be under water!)