1. (noun) New Zealand wind grass, Lachnagrostis filiformis - common throughout Aotearoa/New Zealand in coastal to subalpine open situations and often found as an urban weed, especially in waste land around puddles and in muddy ground. Common around lakes, and fringing ponds, streams and on wetland margins. Slender, upright, tufted, light to yellow green, annual or short-lived perennial grass up to 700 mm tall.