杨柳同科异属,古代有时分称,有时则混称。在公元前21—16世纪,夏末成书的《夏小正》里有:“正月柳梯”和“三月萎杨”;在《诗经》里,有“折柳樊圃”和“东门之杨”;清陈扶摇在《花镜》里说:“柳枝长脆,叶狭长;杨枝短硬,叶圆阔。柳性耐水,杨性宜旱,二木迥不相侔,何可因其并称而遂认为一木耶！”。这已把杨柳分得很清楚了。 但有的专指杨柳为柳树,如沈约的 Willow branches belong to different genus, sometimes called the ancient times, sometimes mixed. In the 21th and 16th centuries BC, Xia Xiaosheng, published in the late summer of the 20th century, contains the lunar etiquette and wilting march in the lunar calendar. In The Book of Songs, there are “Fanliu” and “ ”Chen Qing drooped in the“ reading glasses ”said:" Willow branches crisp, long and narrow leaves; Yang Zhi short hard, Ye Yuankuang .William water, Yang should be drought, Ermu inconsistent, why not because of its alleged Then think of a wood! This has divided the willow very clearly. But some specifically refers to willows as willows, such as Shen about