|C. oshimensis 'Evergold' is usually refered to as C. hachijoensis 'Evergold', see C. hachijoensis 'Evergold' for more information. This evergreen, perennial, ornamental grass has a dense clump-forming growth habit.The Sedge family is quite large, including more than 1,500 species, both evergreen and decidous. These tenacious survivors can be found from the coldest climates and high altitudes all the way to the tropics. All sedge are essentially grasslike in appearance and range in size from extremely small tufts of two inches in height up to large clumps of six or more feet in height and half that in spread. Sedge are nearly always grown for the appearance of foliage as the flower spikes, while attractive are often quite inconspicuous.