Definition of porcupine grass in English:

porcupine grass

noun

  • 1Australian any of several spinifex grasses, especially Triodia pungens and T. irritans.

  • 2US any of several grasses with distinctive upright growth habit, especially Hesperostipa spartea of the midwestern and western plains, and Miscanthus sinensis ‘Strictus’, which is popular as an ornamental for its striking gold-banded foliage.

Origin

Mid 19th century.