Threadleaf Blue Star has a relatively small range where it is found in the wild, hailing only form eastern Oklahoma and western Arkansas. Still fairly new to the gardening world, it is rapidly becoming known, grown and loved by horticulturists everywhere. The Perennial Plant Association has awarded it the Perennial Plant of the year for 2011 and deservedly so. In spring this native perennial is topped with large round cluster of attractive light blue or silvery blue flowers. Most people grow it, however for its foliage. The fine textured leaves turn a beautiful gold during the fall making it one of the best perennials for fall foliage display.