eve·ning prim·rose
noun/ˌiːvnɪŋ ˈprɪmrəʊz/
/ˌiːvnɪŋ ˈprɪmrəʊz/
[countable, uncountable]- a plant with yellow flowers that open in the evening, sometimes used as a medicine
月见草（晚间开黄花，有时作药用） Oxford Collocations DictionaryEvening primrose is used before these nouns:- oil