==形态特征==
[[File:木垂柳3.jpg|缩略图|左|木垂柳[http://image.baidu.com/search/detail?ct=503316480&z=&tn=baiduimagedetail&ipn=d&word=%E6%9C%A8%E5%9E%82%E6%9F%B3%E5%9B%BE%E7%89%87&step_word=&ie=utf-8&in=&cl=2&lm=-1&st=-1&hd=&latest=©right=&cs=1663835983,1992049216&os=3111315887,2526294710&simid=3442553558,503161085&pn=27&rn=1&di=136730&ln=1897&fr=&fmq=1591410385226_R&ic=&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&is=0,0&istype=2&ist=&jit=&bdtype=0&spn=0&pi=0&gsm=0&hs=2&objurl=http%3A%2F%2Fimg.pconline.com.cn%2Fimages%2Fphotoblog%2F6%2F4%2F6%2F7%2F6467404%2F20084%2F9%2F1207716020234_mthumb.jpg&rpstart=0&rpnum=0&adpicid=0&force=undefined 原图链接]]]
柳属的形态特征如下:乔木或匍匐状、垫状、直立灌木。枝圆柱形,髓心近圆形。无顶芽,侧芽通常紧贴枝上,芽鳞单一。叶互生,稀对生,通常狭而长,多为披针形,羽状脉,有锯齿或全缘;叶柄短;具托叶,多有锯齿,常早落,稀宿存。葇荑花序直立或斜展,先叶开放,或与叶同时开放,稀后叶开放;苞片全缘,有毛或无毛,宿存,稀早落;雄蕊2-多数,花丝离生或部分或全部合;腺体1-2(位于花序轴与花丝之间者为腹腺,近苞片者为背腺);雌蕊由2心皮组成,子房无柄或有柄,花柱长短不一,或缺,单1或分裂,柱头1-2,分裂或不裂。蒴果2瓣裂;种子小。多暗褐色。
柳树属于广生态幅植物,对环境的适应性很广,喜光,喜湿,耐寒,是中生偏湿树种。但一些种也较耐旱和耐盐碱,在生态条件较恶劣的地方能够生长,在立地条件优越的平原沃野,生长更好。一般寿命为20~30年,少数种可达百年以上。一年中生长期较长,发芽早,落叶晚,南方个别种为常绿树。
[[File:木垂柳6.jpg|缩略图|木垂柳[http://image.baidu.com/search/detail?ct=503316480&z=&tn=baiduimagedetail&ipn=d&word=%E6%9C%A8%E5%9E%82%E6%9F%B3%E5%9B%BE%E7%89%87&step_word=&ie=utf-8&in=&cl=2&lm=-1&st=-1&hd=&latest=©right=&cs=1310486433,2569225168&os=142451769,613822968&simid=3418014194,228355081&pn=43&rn=1&di=86240&ln=1897&fr=&fmq=1591410385226_R&ic=&s=undefined&se=&sme=&tab=0&width=&height=&face=undefined&is=0,0&istype=2&ist=&jit=&bdtype=0&spn=0&pi=0&gsm=0&hs=2&objurl=http%3A%2F%2Fimg.mp.itc.cn%2Fupload%2F20161129%2F25b41d9e28844cf9a356ca6441df8192_th.jpg&rpstart=0&rpnum=0&adpicid=0&force=undefined 原图链接]]]
==分布范围==