Culm sheath auricles falcate, long. Leaf blade abaxially minutely pubescent along one or both sides of midrib.
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。
A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
肋骨，叶脉：肋骨或肋骨状部分，例如叶子的中脉或昆虫翼的较厚的前部线或边。
The mesophyll is not differentiated into spongy and palisade tissues, but mesophyll near midrib in tip and middle parts of leaf is often lengthened to appear as palisade-liked tissue.
叶肉没有海绵组织和栅栏组织的分化，但叶尖部和叶中部中脉附近的叶肉细胞常伸长，类似栅栏组织细胞。
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