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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Poaceae
Subfamilia: Chloridoideae
Tribus: Cynodonteae
Subtribus: Pappophorinae
Genus: Tridens
Species: T. albescens – T. ambiguus – T. brasiliensis – T. buckleyanus – T. carolinianus – T. chapmanii – T. congestus – T. delicatulus – T. eragrostoides – T. flaccidus – T. flavus –T. hackelii – T. muticus – T. nicorae – T. oklahomensis – T. riograndensis – T. strictus – T. texanus
Name

Tridens Roem. & Schult., Syst. Veg. 2: 34 (1817)
Type species: Tridens carolinianus (Steud.) Henrard, Blumea 3: 424 (1940)

Synonyms

Heterotypic
Tricuspis P.Beauv., Ess. Agrostogr.: 77 (1812), nom. illeg.
Windsoria Nutt., Gen. N. Amer. Pl. 1: 70 (1818).
Gossweilerochloa Renvoize, Kew Bull. 33: 525 (1979).
Antonella Caro, Dominguezia 2: 18 (1981).

References

Roemer, J.J. & Schultes, J.A. (1817) Systema Vegetabilium 2: 34, 599.
Govaerts, R. et al. 2013. Tridens in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2013 Nov. 13. Reference page.
Simon, B.K., Clayton, W.D., Harman, K.T., Vorontsova, M., Brake, I., Healy, D. & Alfonso, Y. 2013. GrassWorld, (Poaceae) Tridens (Poaceae). Published on the internet. Accessed: 2013 Nov. 13.
Tropicos.org 2013. Tridens. Missouri Botanical Garden. Published on the internet. Accessed: 2013 Nov. 13.
International Plant Names Index. 2013. Tridens. Published online. Accessed: 13 Nov. 2013.
GBIF.

Tridens is a genus of perennial grasses in the family Poaceae native to the Americas.[3][4]

Species[2][5][6][7][8]

Tridens albescens (Vasey) Wooton & Standl. - southwest + south-central USA (AZ NM TX LA AR OK KS), Mexico (Chihuahua, Durango, Coahuila, Tamaulipas, Nuevo León)
Tridens ambiguus (Elliott) Schult. – pine barren fluffgrass - southeastern USA (TX LA MS AL GA FL SC NC)
Tridens brasiliensis (Nees ex Steud.) Parodi - Brazil, Paraguay, Uruguay, Argentina
Tridens buckleyanus (Vasey ex L.H.Dewey) Nash - Texas
Tridens carolinianus (Steud.) Henrard - southeastern USA (LA MS AL GA FL SC NC)
Tridens congestus (L.H.Dewey) Nash – pink fluffgrass USA (AZ TX)
Tridens eragrostoides (Vasey & Scribn.) Nash – lovegrass tridens - southern USA (TX AZ NM AL FL), Mexico, Cuba, Venezuela
Tridens flaccidus (Döll) Parodi - Brazil, Guyana, Venezuela, Colombia
Tridens flavus (L.) Hitchc. – purpletop - Ontario, eastern + central USA, Nuevo León
Tridens hackelii (Arechav.) Parodi - Brazil, Uruguay, Argentina
Tridens muticus (Torr.) Nash – slim tridens - southwestern + south-central USA (CA NV AZ UT CO NM TX OK KS MO AR LA), Mexico (Baja California, Sonora, Chihuahua, Durango, Coahuila, Zacatecas, Nuevo León, Querétaro, San Luis Potosí, Tamaulipas)
Tridens nicorae Anton - northern Argentina
Tridens × oklahomensis (Feath.) Feath. - Oklahoma (hybrid T. flavus × T. strictus)
Tridens riograndensis Acedo & Llamas[9] - Rio Grande do Sul in Brazil
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, Durango, Coahuila, Nuevo León, Tamaulipas, San Luis Potosí)

Formerly included[2]

see Dasyochloa Diplachne Erioneuron

Tridens avenaceus - Erioneuron avenaceum
Tridens capensis - Diplachne fusca
Tridens duartei - Diplachne fusca subsp. uninervia
Tridens grandiflorus - Erioneuron avenaceum
Tridens indicus - Diplachne fusca
Tridens nealleyi - Erioneuron avenaceum var. nealleyi
Tridens pulchellus - Dasyochloa pulchella
Tridens veralensis - Diplachne fusca subsp. fascicularis
Tridens verticillata - Diplachne fusca subsp. uninervia
Tridens virens - Diplachne fusca subsp. fascicularis

References

"Genus: Tridens Roem. & Schult". Germplasm Resources Information Network. United States Department of Agriculture. 2011-02-27. Retrieved 2011-03-01.
Kew World Checklist of Selected Plant Families
Roemer, Johann Jakob & Schultes, Josef August. 1817. Systema Vegetabilium 2: 34, 599-600 in Latin
Tropicos, Tridens Roem. & Schult.
The Plant List search for Tridens
"Tridens". Integrated Taxonomic Information System. Retrieved 2011-03-01.
"GRIN Species Records of Tridens". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2011-03-01.
Biota of North America Program 2013 county distribution maps
Acedo, C. and F. Llamas. (2003). A new species of Tridens (Poaceae) from Brazil. Systematic Botany 28:2 313-16.

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