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

间形成层是位于茎具有旺盛分裂能一层细胞。

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

叶脉、叶柄、均为外韧型。

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

主脉发达,有异细胞组成鞘,具双生韧皮部。

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Huge forests full of ferns, mosses, and some of the earliest vascular plants had taken over much of the planet.

长满蕨类植、苔藓和一最早维管束巨大森了地大部分地区。

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