Carex  frosted curls                                                                    Evergold

Carex is also known as sedge.  There are dozens of varieties, some hardy, some grown as annuals.  These are cool season, clumping grasses.  

Varieties:

Carex oshimensis 'Evergold'     leaves are green & cream variegated, mophead form, 16" tall    zone 5

Carex comans 'Frosted curls'    leaves are pale green, curly at the tips, 12-16" tall     zone 7 (annual)

Carex buchananii  'Red rooster'   leaves are copper/bronze, upright, 2' tall    zone 7 (annual)

Carex flagellifera , bronze form     leaves are toffee/bronze, 10-16" tall     zone 7 (annual)