What is the meaning of wire grass?

noun

• Handsome hardy North American grass with foliage turning pale bronze in autumn.
  • synonyms: broom beard grass, prairie grass, Andropogon scoparius, Schizachyrium scoparium
• Coarse annual grass having fingerlike spikes of flowers; native to Old World tropics; a naturalized weed elsewhere.
  • synonyms: yardgrass, yard grass, goose grass, Eleusine indica