''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 of South America. The only species native to the United States, ''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 in Peru * ''

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 ...

'' - Peru,

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 ...

'' - Peru * ''

Dissanthelium californicum ''Dissanthelium californicum'' (California dissanthelium, Catalina grass) is a rare species of grass in the family Poaceae. It was originally discovered on Santa Catalina, an island off California's coast in 1847 by U.S. botanist and naturalist ...

'' - California ( Santa Catalina I, † San Clemente I), † Baja California († Guadalupe I) * ''

Dissanthelium calycinum ''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 ...

'' - Peru,

, Mexico * ''

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 ...

'' - Peru * ''

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 - Peru,

* ''

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 in Peru * ''

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. - Peru,

, Argentina * '' Dissanthelium peruvianum'' - Peru,

, Argentina, Chile * ''

Dissanthelium pygmaeum ''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 ...

'' - Huancavelica in Peru * '' Dissanthelium rauhii'' - Peru * '' Dissanthelium trollii'' -

, eastern Peru ; 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