Carex can be deciduous or evergreen, rhizomatous or tufted perennials, with triangular stems bearing linear or strap-shaped leaves and short or long spikes of tiny green or brown flowers
'Aurea' is an evergreen perennial forming a compact clump of upright or arching, narrow, bright yellow leaves, to 70cm in height, with small blackish flower spikes on erect stems to 45cm in height in early summer