The mesophyll mainly consists of palisade tissue.

叶肉主要为栅栏组织。

The thick leaves have vein-parellel mesophyll cells.

白城色木槭的叶有平脉叶肉细胞，叶片较厚。

The mesophyll was undifferentiation, without chloroplasts.

叶肉不分化，细胞不含叶绿体。

The mesophyll consists of two layers of palisade parenchyma.

叶肉是由两层栅栏薄壁组织组成。

The mesophyll was not differentiated, and was not developed.

叶肉不发达，几乎无分化；