1.
bottle gourd plant; moonflower (Lagenaria siceraria)
A climbing vine whose large white flowers open in the evening. Its fruit is used to make 干瓢 (dried gourd strips, often eaten in sushi).
Named from 夕 (evening) + 顔 (face), reflecting that the flowers open at dusk. Belongs to the gourd family, not the morning-glory family despite the parallel naming.
Common collocations
Cultural note
夕顔 is also the name of a famous chapter and character in The Tale of Genji (源氏物語), giving the word strong literary associations.