害羞草的根、茎、叶等器官的主要特点

含羞草，多年生蔓性草本花卉。茎基部木质化，紫褐色；侧根少，须根多；株高3—50厘米，枝上散生倒刺毛和锐刺；羽状复叶2—4个，掌状排列。小叶14—48个，触之即闭合下垂。

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