For other uses, see Aira (disambiguation).
Aira is a genus of Old World plants in the grass family, native to western and southern Europe, central and southwest Asia, plus Africa.

The common name, shared with the similar related genera Deschampsia and Koeleria, is hair-grass, from the very slender leaves and stems. The species typically occur on dry, sandy sites, and grow to 20–40 cm tall.

Several species are grown as ornamental plants for their very delicate airy seed heads, used in dried flower arrangements.

Species
Aira caryophyllea - Europe, North Africa, alpine Africa, Madagascar, Mauritius, Caucasus, Tibet
Aira cupaniana - Canary Islands, Mediterranean
Aira elegantissima - Central Europe, Mediterranean, Iran, Caucasus
Aira × hybrida - Switzerland
Aira praecox - Europe, Canary Is, Turkey
Aira provincialis - France incl Corsica
Aira scoparia - Macedonia
Aira tenorei - Mediterranean
Aira uniaristata Portugal, Spain, Libya, Morocco
formerly included
Many species now considered better suited to other genera: Agrostis Antinoria Arundinella Arundo Catabrosa Colpodium Corynephorus Cyrtococcum Deschampsia Ehrharta Eragrostis Eremopoa Eriachne Eustachys Hierochloe Koeleria Molinia Pentameris Peyritschia Poa Puccinellia Rostraria Scolochloa Sesleria Sphenopholis Sporobolus Tricholaena Trisetum etc


source - Wikipedia