Sword grass

Sword grass may refer to:


 * 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 (also protecting the grasses around it)), including:
 * Gahnia species
 * Imperata cylindrica (cogon grass)
 * Poa ensiformis
 * Moths and butterflies:
 * Xylena exsoleta (sword-grass)
 * Xylena vetusta (red sword-grass)
 * Tisiphone abeona (sword-grass brown)
 * Tisiphone helena (northern sword-grass brown)