(culm)是禾本科莎草科的地上茎。

一簇秀贵甘蔗的秆

禾本科的秆有明显的节与节间,节间常中空,少数为实心;而莎草科的秆无节与节间之分,多为实心或部分空心,剖面通常呈三角形,少数呈多角形。



埃塞俄比亚居民用秆来盖屋顶
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