noun
wild oat; Avena fatua
A grass species considered a weed in many crops; the Japanese name literally means 'tea-pulling grass'. Rare term, usually written in katakana.
See also: カラス麦 (カラスむぎ)
チャヒキグサは麦畑によく生える雑草です。
Wild oats are a weed that often grows in wheat fields.
この辺りではチャヒキグサが増えている。
Wild oats are increasing around here.
カラス麦 (Avena sativa) is the cultivated oat, while チャヒキグサ (Avena fatua) is the wild, weedy relative.
The name チャヒキグサ literally means 'tea-pulling grass', but the exact origin of this name is uncertain.