pinnate venation

• 羽状脉序

pinnate venation的用法和样例：

例句

1. Venation is a character sometimes used in taxonomy.
   分类学中常将脉序作为一个分类标志。
2. This species is easily distinguished by its quite special venation.
   本种容易通过它的十分特别的脉序来区分。