noun Any member of the genus Lachnagrostis of common slender, upright, tufted, light to yellow green, annual or short-lived perennial grasses up to 700 mm tall, often found as an urban weed, especially in waste land around puddles and in muddy ground, or around lakes, and fringing ponds, streams and on wetland margins and coastal areas.
noun Any member of the genus Apera of silky bent grasses.