evening primrose

evening-primrose的词性：
n.（名词）

1. Any of various North American plants of the genus Oenothera, characteristically having four-petaled yellow flowers that open in the evening. Also called sundrops
月见草，待宵草：一种生长于北美的月见草 属植物，以四瓣黄花和傍晚开放为特征 也作 sundrops