noun
evening primrose
A flowering plant that opens its blooms in the evening. The name 宵待草 literally means 'twilight-waiting grass'.
宵待草は夕方に黄色い花を咲かせる。
Evening primroses bloom with yellow flowers in the evening.
Compound of 宵 (よい, 'evening') + 待ち (まち, 'waiting') + 草 (くさ, 'grass'), referring to its evening-blooming habit.