What is "hair grass"

Hair grass \Hair" grass`\ (gr[.a]s`). (Bot.) A grass with very slender leaves or branches; as the Agrostis scabra, and several species of Aira or Deschampsia.

n. 1 A grass with very slender leaves or branches, as: 2 # (taxlink Agrostis scabra species), a bunchgrass. 3 # Several species of ''Aira''. 4 # Species of (taxlink Koeleria genus). 5 # Several species of (taxlink Deschampsia genus), tussock grass.

n. fine-leaved aquatic spike rush; popular as aerator for aquariums [syn: needle spike rush, needle rush, slender spike rush, Eleocharis acicularis]

Hair grass is a common name for several plants and can refer to:

• Agrostis hyemalis (winter bentgrass, ticklegrass)
• Agrostis scabra, "hair grass" (rough bent grass, winter bent grass, ticklegrass)
• '' Aira, hairgrass
• Aira caryophyllea, silver hairgrass
• Aira praecox, early hair grass
• Corynephorus canescens, grey hair-grass
• Deschampsia, hair grass
• Eleocharis acicularis, dwarf hairgrass
• Eleocharis parvula, "hairgrass" (dwarf spikerush, small spikerush)
• Koeleria glauca, Blue Hair Grass
• Koeleria macrantha, crested hair grass
• Koeleria vallesiana, Somerset hair grass
• Rostraria cristata, Mediterranean hair grass