evening primrose; fragrant evening primrose
Sense 1 is the general term for evening primrose; sense 2 specifies Oenothera stricta. Both are common plant names.
Evening primroses are blooming in the garden.
Evening primroses open their flowers in the evening.
Standard kanji spelling for evening primrose.
Katakana spelling; usually written in kana.
待宵 (matsuyoi, 'waiting for the evening') + 草 (kusa, 'grass/plant'), referring to its evening-blooming habit.