萱草(Hemerocallis fulva),又名忘忧草,原产中国南部、欧洲南部和日本。为百合科萱草属多年生宿根草本植物,具短根状茎和纺锤状肉质根。叶基生,排成两列,条形。花生顶端,6～7月开黄花六七朵,花瓣略向外卷下垂。萱草自古以来就是雅俗共赏的花卉,历代文人常以其为吟咏的题材,苏东坡诗云:“萱草虽微花,孤秀能自拔,亭亭乱叶中,一一芳心插。”生动地描绘了萱草的形态特征。萱草花期持续数十日,但每花仅开一日,所以又有“日花百合”之称,即英文名Daylily。 Hemerocallis fulva, also known as forget you grass, native to southern China, southern Europe and Japan. Liliaceae Hemerocallis perennial perennial herb, with short rhizomes and spindle-shaped fleshy root. Ye Ji students, arranged in two columns, bar. At the top of peanuts, six or seven yellow flowers opened in June and July, and the petals drooped slightly outward. Hemerocallis flowers since ancient times is the elegance and commonplace, the ancient literati often chant for its theme, Su Dongpo poem: “Although Hemerocallis flowers, solitary show can extricate themselves, Tingchao messy leaves, eleven infatuation.” Vividly depicts the daylight Morphological characteristics. Hemerocallis flowering lasted tens of days, but only a day for each flower, so there are “Japanese Lily”, the English name Daylily.