| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Poaceae | Tridens ×oklahomensis | Oklahoma Tridens, Hybrid Tridens | Disturbed areas, roadsides. | Interior Highlands and adjacent provinces of AR, OK, KS, and ne. TX; Interior Low Plateau of KY and TN. |  (c) Witsell, Theo - CC-BY-NC, permission granted to NCBG |
| Poaceae | Tridens albescens | White Tridens, White Fluffgrass | Dry grasslands; eastwards (SC) in waste area near wool-combing mill, presumably merely a waif. | KS, NM, AZ south through TX into Mexico (CHH, COA, DGO, NLE, TAM). |  (c) Campos, Aidan |
| Poaceae | Tridens ambiguus | Pineland Triodia, Flatwoods Fluffgrass | Wet pine savannas, clay-based Carolina bays, marshes. | S. NC south to FL, west to e. TX and ne. Mexico (TAM). |  (c) Smith, Jake - CC-BY-NC, permission granted to NCBG |
| Poaceae | Tridens buckleyanus | Buckley's Tridens, Buckley's Fluffgrass | Woodlands. | C. TX, mainly Edwards Plateau. | |
| Poaceae | Tridens carolinianus | Carolina Triodia, Carolina Fluffgrass | Mesic swales in sandhills. | S. NC south to c. FL (Orange and Hillsborough counties), west to LA. |  (c) Sorrie, Bruce A. |
| Poaceae | Tridens chapmanii | Chapman's Triodia | Longleaf pine sandhills, loamy sands of longleaf pine woodlands; inland in glades, river-scour prairies and barrens, sandy barrens, and roadsides; maritime forests in loamy, interdune areas. | NJ south to s. FL, west to TX and OK. |  (c) Sorrie, Bruce A. |
| Poaceae | Tridens congestus | Pink Tridens, Pink Fluffgrass | Wet and moist prairies, coastal prairies. | Nc. TX to s. TX |  (c) Campos, Aidan |
| Poaceae | Tridens flavus | Redtop, Tall Redtop, Purpletop Tridens, Greasy Grass | Roadsides, disturbed areas, glades, barrens. | NH west to NE, south to s. FL and TX. |  (c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG |
| Poaceae | Tridens strictus | Spike Triodia, Longspike Fluffgrass, Longspike Tridens | Longleaf pine sandhills, moist pine savannas, woodlands and pine or oak savannas inland from the Coastal Plain, mesic to wet soils around swamps and marshes, roadsides. | S. VA south to AL, west to TX, north in the interior to IL and KS. Rhoads & Klein (1993) report an old specimen from w. PA, presumably a waif. |  (c) Sorrie, Bruce A. |
| Poaceae | Tridens texanus | Texas Tridens, Texas Fluffgrass | Brushlands. | C. and w. TX south through s. TX to Mexico (CHH, COA, NLE, SLP, TAM). |  (c) Kieschnick, Sam - CC-BY |