petiole ['petɪˌoʊl]

例句:

• A sessile leaf has no petiole.
  无柄的叶没有叶柄.
  
• The vascular tissue passes through the pulvinus into the petiole proper.
  维管组织经过叶枕进入叶柄.
  
• Light green, elliptical, very thin, long flexible petiole. Usually single crown. Large.
  亮绿色椭圆型很薄的叶子, 长而有弹性的叶柄. 通常单个顶芽. 大型.