Noun
Any of several not closely related grasses in some way reminiscent of a spear.
Species of Aristida (three-awn wiregrass)
Heteropogon contortus (tanglehead)
Imperata cylindrica (cogon grass)
Species of Poa (bluegrass etc)
Species of Stipa (feathergrass), typically Stipa calamagrostis
Species of Aciphylla (Spaniard grass)
Source: en.wiktionary.org