Tridens (plant)

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

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]
Antonella Caro Gossweilerochloa Renvoize Tricuspis P.Beauv. 1812, illegitimate homonym not Pers. 1806 Windsoria Nutt.

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