noun
knotgrass; Polygonum aviculare
A common weed found along roadsides and paths; the name literally means 'road willow'.
道端にミチヤナギがたくさん生えている。
A lot of knotgrass is growing by the roadside.
The name ミチヤナギ (道柳) literally means 'road willow', likely from its willow-like leaves and roadside habitat. The exact historical derivation is uncertain.