【摘要】 鸭跖草花梗顶部的维管束分布在中央的基本组织内。自花梗顶部至子房室基部 ,维管束系统发生复杂的变化。 6枚向外偏斜的维管束发生内外或左右分支 ,其中 3枚维管束发生内外分支 ,其外侧的 3个分支进入萼片成为萼片维管束系统 ,内侧 3个分支进入 3枚外轮雄蕊而成为外轮雄蕊维管束 ;另 3枚维管束先发生内外分支 ,接着外侧 3分支发生进一步的左右分支 ,各形成 3～ 5个小分支 ,最后进入花瓣成为花瓣维管束系统 ,而内侧的分支则不再细分 ,最后伸入 3枚内轮雄蕊 ,成为内轮雄蕊维管束。另 6枚近圆束形的维管束一直在中央向上延伸 ,进入子房室区后 ,其中 3枚进入子房壁 ,成为 3束心皮背束 ,最后 3束心皮背束进入花柱成为花柱维管束 ,另 3枚聚向中央 ,成为胎座维管束 ,胎座维管束至子房室顶部时消失。文中对鸭跖草及其有关类群的花部维管束系统的来源及演变进行了比较、讨论更多还原

【Abstract】 Vascular bundles of the pedicel in flower of Commelina communis were scattered within central fundamental tissues.The vascular system changed complexly from the top of the pedicel to the base of the locule.The six bundles inclined to outerside of them bore the inner outer or left right branches,of which three outer branches of those only borne inner outer branches entered the sepal to become its vascular system,three inner branches of those entered three stamen of outer whorl, of which the other three bundles firstly divided into two respectively,then the outer one divided into 3~5 strands which all entered the petal,the inner one no longer divided and extended into the stamen of inner whorl.The other six bundles,which were nearly round,continuously expanded towards the top,of which three bundles entered the ovary wall after extended into the locule region to become the carpellary dorsal bundles which finally entered the style,of which the other three moved to center to become the placenta vascular bundles which were absent at the top of the locule.The origin and evolution of the vascular system of the flower in Commelina communis and the taxa concerned were discussed in this paper.更多还原