speargrass

Noun

Meaning

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

cogon