Tridens (plant)

Tridens
Tridens flavus
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Chloridoideae
Tribe:	Cynodonteae
Subtribe:	Pappophorinae
Genus:	Tridens Roem. & Schult. [1]
Type species
Tridens flavus
Synonyms [2]
AntonellaCaro GossweilerochloaRenvoize TricuspisP.Beauv. 1812, illegitimate homonym not Pers. 1806 WindsoriaNutt.

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

Species

13 species are accepted. ^{[5] [2] [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 carolinianus (Steud.) Henrard - southeastern USA (LA MS AL GA FL SC NC)
• Tridens chapmanii (Small) Chase – south-central and southeastern United States to New Jersey
• Tridens congestus (L.H.Dewey) Nash– pink fluffgrass USA (AZ TX)
• 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 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 , and Tridentopsis

• Tridens avenaceus - Erioneuron avenaceum
• Tridens buckleyanus(Vasey ex L.H.Dewey) Nash - Tridentopsis buckleyana (L.H.Dewey) P.M.Peterson & Romasch.
• Tridens capensis - Diplachne fusca
• Tridens duartei - Diplachne fusca subsp. uninervia
• Tridens eragrostoides(Vasey & Scribn.) Nash - Triplasiella eragrostoides (Vasey & Scribn.) P.M.Peterson & Romasch.
• Tridens grandiflorus - Erioneuron avenaceum
• Tridens indicus - Diplachne fusca
• Tridens muticus(Torr.) Nash - Tridentopsis mutica (Torr.) P.M.Peterson
• 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

1. "Genus: Tridens Roem. & Schult". Germplasm Resources Information Network. United States Department of Agriculture. 2011-02-27. Retrieved 2011-03-01.
2. Kew World Checklist of Selected Plant Families
3. Roemer, Johann Jakob & Schultes, Josef August. 1817. Systema Vegetabilium 2: 34, 599-600 in Latin
4. Tropicos, Tridens Roem. & Schult.
5. "Tridens Roem. & Schult". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 10 June 2025.
6. "Tridens". Integrated Taxonomic Information System . Retrieved 2011-03-01.
7. "GRIN Species Records of Tridens". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2011-03-01.
8. Biota of North America Program 2013 county distribution maps
9. Acedo, C. and F. Llamas. (2003). A new species of Tridens (Poaceae) from Brazil. Systematic Botany 28:2 313-16.

External links

• Jepson Manual: Tridens
• USDA Plants Profile