维管束的

The development of xylem is of mesarch.Stomata are monocyclic type.

叶脉、叶柄、上胚轴的维管束均为外韧型。

The micrib belonging to bicollateral bundle is well developed.The bundle sheath is composed of idioblasts.

主脉发达，有异细的维管束鞘，具双生韧皮部。

Interfascicular cambium A single layer of actively dividing cells between the vascular bundles in stems.

束间层是位于茎的维管束间的具有分裂能力的一层细。