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萱草(Hemerccallis minor Mill)是百合科,多年生宿根植物。又名金针菜、黄花菜等。植株高30～60cm,根绳索状有横纹。叶基生比花茎短,叶线形,绿色无毛。花茎由叶丛中抽出,有一花或数花,花漏斗状淡黄色,侧向生,雄蕊6枚,雌蕊1枚,子房3室。朔果长圆形,具三棱约3～5cm,成熟时三瓣裂。花期6～8月,果期7～9月。
Hemerccallis minor Mill is a lily family, perennial perennial plant. Also known as lily, lily and so on. Plant height 30 ~ 60cm, root rope shaped stripes. Leaves basal shorter than inflorescence, leaf linear, green glabrous. Stems drawn from the leaves of the cluster, a flower or a few flowers, funnel-shaped pale yellow, lateral Health, 6 stamens, 1 pistil, ovary 3 rooms. Shuo fruit oblong, with triangular about 3 ~ 5cm, mature when the three valves cracked. Flowering from June to August, the fruit period from July to September.