''Dissanthelium'' is a genus of plants in the

grass family Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns and ...

. It is native to the Americas, especially in the

Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...

. The only species native to the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

, ''D. californicum,'' was thought to be extinct until a single population was discovered on

Santa Catalina Island, California Santa Catalina Island ( xgf, Pimuu'nga or ; es, Isla Santa Catalina) is a rocky island off the coast of Southern California in the Gulf of Santa Catalina. The island name is often shortened to Catalina Island or just Catalina. The island is l ...

, in 2005.Craig Dremann. 2005. A Botanical Treasure Hunt to rediscover the formerly "extinct" grass, ''Dissanthelium californicum'', on San Clemente Island.
/ref> ; Species * ''

Dissanthelium amplivaginatum ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popul ...

'' -

Ancash Ancash ( qu, Anqash; es, Áncash ) is a department and region in northern Peru. It is bordered by the departments of La Libertad on the north, Huánuco and Pasco on the east, Lima on the south, and the Pacific Ocean on the west. Its capital i ...

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

* ''

Dissanthelium breve ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popu ...

'' -

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

* ''

Dissanthelium brevifolium ''Dissanthelium'' is a genus of plants in the Poaceae, grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a sin ...

'' -

* '' Dissanthelium californicum'' -

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

( Santa Catalina I, † San Clemente I), †

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

(† Guadalupe I) * '' Dissanthelium calycinum'' -

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

* ''

Dissanthelium giganteum ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popul ...

'' -

* ''

Dissanthelium laxifolium ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popul ...

'' Swallen & Tovar -

* ''

Dissanthelium longifolium ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popul ...

'' Tovar -

Huánuco Huánuco (; qu, Wanuku) is a city in central Peru. It had a population of 196,627 as of 2017 and in 2015 it had a population of 175,068. It is the capital of the Huánuco Region and the Huánuco District. It is the seat of the diocese of Huán ...

* ''

Dissanthelium longiligulatum ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popul ...

'' Swallen & Tovar -

La Paz La Paz (), officially known as Nuestra Señora de La Paz (Spanish pronunciation: ), is the seat of government of the Bolivia, Plurinational State of Bolivia. With an estimated 816,044 residents as of 2020, La Paz is the List of Bolivian cities ...

* ''

Dissanthelium macusaniense ''Dissanthelium'' is a genus of plants in the grass family. It is native to the Americas, especially in the Andes of South America. The only species native to the United States, ''D. californicum,'' was thought to be extinct until a single popu ...

'' (E.H.L.Krause) R.C.Foster & L.B.Sm. -

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

* '' Dissanthelium peruvianum'' -

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...

* '' Dissanthelium pygmaeum'' -

Huancavelica Huancavelica () or Wankawillka in Quechua is a city in Peru. It is the capital of the department of Huancavelica and according to the 2017 census had a population of 49,570 people. The city was established on August 5, 1572 by the Viceroy ...

* '' Dissanthelium rauhii'' -

* '' Dissanthelium trollii'' -

, eastern

; formerly included see ''

Poa ''Poa'' is a genus of about 570 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass (mainly in Europe and Asia), bluegrass (mainly in North America), tussock (some New Zealand species), a ...

'' * ''Dissanthelium atropidiforme -

Poa atropidiformis ''Poa'' is a genus of about 570 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass (mainly in Europe and Asia), bluegrass (mainly in North America), tussock (some New Zealand species), a ...

'' * ''Dissanthelium patagonicum -

References

Pooideae Poaceae genera {{Pooideae-stub