Deschampsia is a genus of plants in the grass family, commonly known as hair grass or tussock grass. The genus is widespread across many countries.

The genus is named for French physician and naturalist Louis Auguste Deschamps, 1765-1842.

Deschampsia species are used as food plants by the larvae of some Lepidoptera species including Antler Moth, The Clay, Clouded-bordered Brindle, Common Wainscot, Dark Arches, Dusky Brocade, Shoulder-striped Wainscot, Smoky Wainscot and Wall.

Deschampsia sometimes grow in boggy acidic formations, an example of which is the Portlethen Moss, Scotland. Deschampsia antarctica is the world's most southern monocot, and one of only two flowering plants of Antarctica.

Species
Deschampsia airiformis (Steud.) Benth. & Hook.f. ex B.D.Jacks. - Chile, Argentina
Deschampsia angusta Stapf & C.E.Hubb. - Zaire, Kenya, Uganda
Deschampsia antarctica E.Desv. - Chile, Argentina, Antarctica, Falkland Is, South Georgia, Crozet Is, Heard-McDonald Is, Kerguelen Is, South Sandwich Is
Deschampsia argentea Lowe - Azores, Madeira, Canary Is
Deschampsia atropurpurea (Wahlenb.) Scheele - northern Eurasia, North America, Chile, Argentina
Deschampsia baicalensis Tzvelev - Irkutsk
Deschampsia berteroniana (Kunth) F.Meigen - Chile, Argentina
Deschampsia bottnica (Wahlenb.) Trin. - Kvarken Archipelago (part of Finland)
Deschampsia cespitosa (L.) P.Beauv. - temperate, subarctic, + alpine regions in North America, Eurasia, Africa, Australia, various islands
Deschampsia chapmanii Petrie - New Zealand incl Antipodes, Macquarie Is
Deschampsia christophersenii C.E.Hubb. - Tristan da Cunha
Deschampsia cordillerarum Hauman - Chile, Argentina
Deschampsia danthonioides (Trin.) Munro – Annual hairgrass - Alaska, Yukon, British Columbia, western USA, Mexico
Deschampsia elongata (Hook.) Munro - Chile, Argentina, United States incl Alaska, Canada, Mexico
Deschampsia flexuosa (L.) Trin - Eurasia, alpine areas in Africa; northern North America, southern South America, Falkland Is
Deschampsia foliosa Hack. - Azores
Deschampsia gracillima Kirk New Zealand incl Antipodes, Tasmania
Deschampsia kingii (Hook.f.) É.Desv. - Chile, Argentina
Deschampsia klossii Ridl. - Lesser Sunda Is, New Guinea
Deschampsia koelerioides Regel - Siberia, Central Asia, China, Mongolia, Afghanistan, Pakistan
Deschampsia laxa Phil. - Chile, Argentina
Deschampsia leskovii Tzvelev - northern European Russia
Deschampsia liebmanniana (E.Fourn.) Hitchc. - Mexico
Deschampsia ligulata (Stapf) Henrard - Borneo
Deschampsia looseriana Parodi - Chile
Deschampsia maderensis (Hack. & Bornm.) Buschm. - Madeira
Deschampsia media (Gouan) Roem. & Schult. - central + southern Europe, Morocco, Caucasus
Deschampsia mejlandii C.E.Hubb. - Tristan da Cunha
Deschampsia mendocina Parodi - Argentina
†Deschampsia mexicana Scribn. - Mexico, apparently extinct
Deschampsia mildbraedii Pilg. - Cameroon
Deschampsia nubigena Hillebr. - Hawaii
Deschampsia parvula (Hook.f.) É.Desv. - Chile, Argentina, Falkland Is, Anvers Island
Deschampsia patula (Phil.) Skottsb. - Chile, Argentina
Deschampsia pusilla Petrie - New Zealand South Island
Deschampsia robusta C.E.Hubb. - Tristan da Cunha
Deschampsia setacea (Huds.) Hack. - northern + western Europe
Deschampsia tenella Petrie - New Zealand
Deschampsia venustula Parodi - Chile, Argentina
Deschampsia wacei C.E.Hubb.- Tristan da Cunha
formerly included
numerous species now regarded a better suited to other genera: Aira Antinoria Bromus Calamagrostis Centropodia Colpodium Dissanthelium Holcus Periballia Peyritschia Poa Trisetum Vahlodea


source - Wikipedia