Sword grass
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Revision as of 20:48, 16 September 2006 by 209.144.237.181 (Talk)
Sword grass is a name used for some species of grasses with blades that are sharp enough to cut human skin. This is because they contain many silica phytoliths, a hardening material in many plants. The sharp blades help to discourage herbivores from grazing, protecting the grasses around it as well.
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