''Tridens'' is a genus of perennial

grass Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family (biology), family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos, the grasses of natural grassland and spe ...

es in the family

Poaceae Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos, the grasses of natural grassland and species cultivate ...

native to the

Americas The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...

.Tropicos, ''Tridens'' Roem. & Schult.
/ref>

Species

13 species are accepted. * '' Tridens albescens'' (Vasey) Wooton & Standl. - southwest + south-central USA ( AZ NM TX LA AR OK KS), Mexico ( Chihuahua,

Durango Durango, officially the Free and Sovereign State of Durango, is one of the 31 states which make up the Political divisions of Mexico, 32 Federal Entities of Mexico, situated in the northwest portion of the country. With a population of 1,832,650 ...

Coahuila Coahuila, formally Coahuila de Zaragoza, officially the Free and Sovereign State of Coahuila de Zaragoza, is one of the 31 states of Mexico. The largest city and State Capital is the city of Saltillo; the second largest is Torreón and the thi ...

Tamaulipas Tamaulipas, officially the Free and Sovereign State of Tamaulipas, is a state in Mexico; one of the 31 states which, along with Mexico City, comprise the 32 federal entities of Mexico. It is divided into 43 municipalities. It is located in nor ...

Nuevo León Nuevo León, officially the Free and Sovereign State of Nuevo León, is a Administrative divisions of Mexico, state in northeastern Mexico. The state borders the Mexican states of Tamaulipas, Coahuila, Zacatecas, and San Luis Potosí, San Luis ...

) * '' Tridens ambiguus'' (Elliott) Schult. – pine barren fluffgrass - southeastern USA ( TX LA MS AL GA FL SC NC) * '' Tridens brasiliensis'' (Nees ex Steud.) Parodi -

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

Paraguay Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the Argentina–Paraguay border, south and southwest, Brazil to the Brazil–Paraguay border, east and northeast, and Boli ...

Uruguay Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

* '' Tridens carolinianus'' (Steud.) Henrard - southeastern USA ( LA MS AL GA FL SC NC) * '' Tridens chapmanii'' – south-central and southeastern United States to New Jersey * '' Tridens congestus'' (L.H.Dewey) Nash – pink fluffgrass USA ( AZ TX) * '' Tridens flaccidus'' (Döll) Parodi -

Guyana Guyana, officially the Co-operative Republic of Guyana, is a country on the northern coast of South America, part of the historic British West Indies. entry "Guyana" Georgetown, Guyana, Georgetown is the capital of Guyana and is also the co ...

Venezuela Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It com ...

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

* '' Tridens flavus'' (L.) Hitchc. – purpletop -

Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...

, eastern + central USA,

* '' Tridens hackelii'' (Arechav.) Parodi -

* '' Tridens nicorae'' Anton - northern

* '' Tridens × oklahomensis'' (Feath.) Feath. -

Oklahoma Oklahoma ( ; Choctaw language, Choctaw: , ) is a landlocked U.S. state, state in the South Central United States, South Central region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northea ...

(hybrid ''T. flavus × T. strictus)'' * '' Tridens riograndensis'' Acedo & LlamasAcedo, C. and F. Llamas. (2003). A new species of ''Tridens'' (Poaceae) from Brazil. ''Systematic Botany'' 28:2 313-16. -

Rio Grande do Sul Rio Grande do Sul (, ; ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative units of Brazil#List, fifth-most populous state and the List of Brazilian s ...

* '' Tridens strictus'' (Nutt.) Nash – longspike tridens - southeastern + south-central USA (from TX to FL to IL + PA) * '' Tridens texanus'' (S. Watson) Nash - USA ( TX NM), Mexico ( Chihuahua,

San Luis Potosí San Luis Potosí, officially the Free and Sovereign State of San Luis Potosí, is one of the 32 states which compose the Federal Entities of Mexico. It is divided in 59 municipalities and is named after its capital city, San Luis Potosí. It ...

) ; Formerly included

References

External links

Jepson Manual: ''Tridens''

USDA Plants Profile
Chloridoideae Grasses of North America Grasses of South America Grasses of Argentina Grasses of Brazil Grasses of Mexico Grasses of the United States Poaceae genera Taxa described in 1817 {{Chloridoideae-stub