evening primrose; fragrant evening primrose
Sense 1 is the general term for evening primrose; sense 2 specifies Oenothera stricta. Both are common plant names.
庭にマツヨイグサが咲いている。
Evening primroses are blooming in the garden.
待宵草は夕方に花を開く。
Evening primroses open their flowers in the evening.