FNPS Plant Database

Tridens flavus

tall redtop, purpletop

Nomenclature

Common Name:

tall redtop, purpletop

Synonym(s):

Genus species:

Tridens flavus

Family:

Poaceae

Plant Specifics

Form:

grass

Size:

2-5 ft tall, forms sod.

Life Span:

Long-lived perennial

Flower Color:

Fruit Color:

red-purple

Phenology:

Blooms and sets seed in fall

Noted For:

Landscaping

Recommended Uses:

Rear of garden as a screen.  Native meadows.

Considerations:

Availability:

Propagation:

Light:

Moisture Tolerance:

Always Flooded---------------------------------Extremely Dry

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Somewhat moist, no flooding -to- Not wet but not extremely dry

Salt Water Flooding Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Moderate. Tolerant of salty wind and may get some salt spray.

Soil or Other Substrate:

Soil pH:

4.5 to 6.5

Suitable to Grow In:

USDA zones are based on the average annual extreme minimum winter temperature.



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Ecology

Wildlife:

Butterflies, Birds

Butterflies, moths

Turkey and quail eat the seed.  Provides cover for small ground-dwelling animals.

Native Habitats:

Flatwoods, open woodlands

Natural Range in Florida:

Comments:

Ethnobotany:

General Comments:

Citations:

Apfelbaum, S., B. Baker, F. Faessler, and D. Mahler. 2005. Obtaining and processing seeds. In: The tallgrass restoration handbook for prairies, savannas, and woodlands. Eds. S. Packard and C. Mutel, pgs. 99-126. Science and Practice of Ecological Restoration Series edition. Island Press. Washington



D.C. Barbour, J. 2007. Propagation protocol for production of propagules (seeds, cuttings, poles, etc.) Tridens flavus seeds. USDA FS National Seed Laboratory Dry Branch, GA. In: Native Plant Network. URL: http://NativePlantNetwork.org (accessed 2021/3/10).



US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.



Boggess, N. and B. Baker. 1983. Edaphic requirements and characteristics of purpletop. Agron. J. (75): pgs.53-56.



Grabowski, Janet. 2001. Propagation protocol for production of propagules (seeds, cuttings, poles, etc.) Tridens flavus (L.) A.S. Hitche. plants. USDA NRCS US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.



Harmond, J., J. Smith, and J. Park. 1961. Harvesting the seeds of grasses and legumes. In: The yearbook of agriculture 1961. Seeds. Pgs 181-188. United States Department of Agriculture. US Government Printing Office. Washington, DC.



Illinois Wildflowers. 2021. Tridens flavus cupreus. Accessed online: https://illinoiswildflowers/info/grasses/plants/purpletop.htm



Ladybird Johnson Wildflower Center. 2021. Tridens flavus – plant database. Ladybird Johnson Wildflower Center. Austin, TX. Accessed online: https://www.wildflower.org/plants/result.php?id_plant=TRFL2



Linex, R. 2014. Range plants of north central Texas-a landuser’s guide to their identification, value, and management. Natural Resources Conservation Service. Loflin B. and S. Loflin. 2012. Grasses of the Texas hill country-a field guide. Texas A&M University Press. College Station, TX.



Miller, J. and K. Miller. 2005. Forest plants of the southeast and their wildlife uses. Revised ed. The University of Georgia Press. Athens, GA.



NC State Extension. 2021. Tridens flavus. North Carolina Extension Gardener Plant Toolbox. North Carolina State Extension. Raleigh, NC.



USDA NRCS Brooksville Plant Materials Center. 1997. Development of seed sources and establishment methods for native upland reclamation. USDA NRCS Brooksville Plant Materials Center. Brooksville, FL.



Pfaff, S., M. Gonter, and C. Maura. 2002. Florida native seed production manual. USDA NRCS Brooksville Plant Materials Center. Brooksville, FL

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