叶片通常长圆形到卵形，心形的或近如此在基部；叶和果没有短柔毛。
Leaf blade usually oblong to ovate, cordate or nearly so at base; leaf and fruit without pubescence.
叶片薄革质；果具粗糙的短柔毛。
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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