1. (noun) hook sedge, hook grass, bastard grass, Uncinia uncinata - a grasslike hooked sedge native to Aotearoa/New Zealand, the Society Islands, and Hawai‘i. Its natural habitat is from the coast up to 1000 metres, and is found in areas ranging from native forest to shrubland. Forms dense mounds of orange-red, or green, arching leaves about 50 cm high.