竿箨耳廓镰刀形，长。沿着中脉的两面的那个或的叶片背面稍具短柔毛。

Culm sheath auricles falcate, long. Leaf blade abaxially minutely pubescent along one or both sides of midrib.

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总状花序1 - 4，从最上部的叶，具长柔毛或具粗毛具多细胞毛腋生；苞片宽线形，长于花梗。

Racemes 1-4, axillary from uppermost leaves, villous or hirsute with multicellular hairs; bracts broadly linear, longer than pedicel.

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不育的子房球状，密被具铁锈色长柔毛。

Sterile ovary globose, densely ferruginous villous.

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