noun
knotgrass; Polygonum aviculare
A common annual weed found in gardens and paths; also known as 道柳 (みちやなぎ).
See also: 道柳
庭の隅にニワヤナギが生えていた。
Knotgrass was growing in the corner of the garden.
Synonym; 道柳 is an alternative name for the same plant, literally 'road willow'.
Literally 'garden willow', from 庭 (にわ, garden) + 柳 (やなぎ, willow), referring to its willow-like leaves and common habitat.