托叶完全抱茎的或者有时半抱茎。

Stipules fully amplexicaul or sometimes semiamplexicaul.

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完全叶由叶柄、叶片和托叶组成。

Complete leaf composed of petiole, blade and stipule.

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根状茎弯曲；托叶鞘：下半部分绿色，上半部分棕色，半裂至中部。

Rhizomes curved; ocrea: lower part green, upper part brown, cleft to middle.

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根状茎弯曲；托叶鞘：下半部分绿色，上半部分棕色，半裂至中部。

Rhizomes curved; ocrea: lower part green, upper part brown, cleft to middle.

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