Baumea rubiginosa variegata
An attractive rigidly upright-growing sedge-like plant from New Zealand. The dense clumps have 1/8 inch wide needle-like leaves that are deep green and striped along one edge with yellow. This plant will grow in moist soils but seems to do best in loose soil with frequent to regular irrigation. Also can go in water if crown is out of the water and in these conditions will grow to up to 3 feet tall. Note I have seen this plant spread in wet conditions.
Uses: Containers, beds, water gardens
Full Sun to Part Shade will tend to lose variegation in too much shade