Tridens flavus

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Tridens flavus
Scientific classification
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Monocots
(unranked):Commelinids
Order:Poales
Family:Poaceae
Genus:Tridens
Species:T. flavus
Binomial name
Tridens flavus
(L.) A.S.Hitchc.
 
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Tridens flavus
Scientific classification
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Monocots
(unranked):Commelinids
Order:Poales
Family:Poaceae
Genus:Tridens
Species:T. flavus
Binomial name
Tridens flavus
(L.) A.S.Hitchc.

Tridens flavus (Purpletop, Red Top, or Greasegrass) is a large, robust perennial bunchgrass native to North America. The seeds are purple, giving the grass its common name. The seeds are also oily, leading to its other common name, "greasegrass". It reproduces by seed and tillers. The grass is often confused with Johnson grass.

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