Common Names: Lelong Redtop Panicgrass 
|Photo by © Arthur Haines, New England Wild Flower Society|
|Division:||Magnoliophyta - Flowering plants|
|Class:||Liliopsida - Moncots|
|Natural range of Coleataenia longifolia from Weakley |
Synonyms: Sorengia longifolia (Torrey) Zuloaga & Morrone ssp. combsii (Scribner & C.R. Ball) Zuloaga & Morrone; Panicum longifolium Torrey var. combsii (Scribner & C.R. Ball) Fernald; Panicum rigidulum Bosc ex Nees ssp. combsii (Scribner & C.R. Ball) Freckmann & Lelong; Panicum rigidulum Bosc ex Nees var. combsii (Scribner & C.R. Ball) Lelong; Panicum longifolium; Panicum combsii Scribner & C.R. Ball.
Subspecies: Coleataenia longifolia (Torrey) Soreng ssp. combsii (Scribner & C.R. Ball) Soreng; Coleataenia longifolia (Torrey) Soreng ssp. longifolia.
C. longifolia is a perennial graminoid of the Poaceae family native to North America. 
C. longifolia is commonly found in the south and eastern United States. The subspecies, ssp. cobsii can be found along the outer Coastal Plain from southeast Massachusetts to Florida and west to southeast Louisiana, while ssp. longifolia can be found in the rest of the native distribution.
Coleataenia longifolia is listed as a facultative upland species that usually occurs in non-wetland areas, but can also be found in wetland habitats such as pond shores, depression meadows, cypress savannas, marshes, and low woods. This species has been recovered for specimens from habitats including bogs, bottomland of hardwood forests, moist loamy sands, of pinelands, and wet shady loam near streams.
C. longifolia ssp. combsii is a longleaf pine ecosystem associate that is considered rare in Georgia.
Associated species include Triadica sebifera, Rhexia virginica, Rhexia mariana, Cinna arundinacea, Scirpus cyperinus, Eupatorium serotinum, Quercus virginiana, Quercus laurifolia, Liquidambar styraciflua, Carya sp., and Fagus sp.
Conservation, cultivation, and restoration
C. longifolia is listed as threatened by the Michigan Department of Natural Resources and the Massachusetts Division of Fisheries and Wildlife. It is also listed as extirpated by the Indiana Department of Natural Resources, as presumed extirpated by the Ohio Department of Natural Resources, and a species of special concern by the Rhode Island Department of Environmental Management.
References and notes
- USDA Plant Database
- Weakley, Alan S. 2015. Flora of the Southern and Mid-Atlantic States: Working Draft of 21 May 2015. University of North Carolina, Chapel Hill, North Carolina. 1320 pp.
- Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
- URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: John B. Nelson, M.Darst, H. Light, Loran C. Anderson. States and counties: Florida (Dixie, Hamilton, Leon) South Carolina (Richland)
- Walker, J. (1993). Rare vascular plant taxa associated with the longleaf pine ecosystems: Patterns in taxonomy and ecology. Tall Timbers Fire Ecology Conference, Tall Timbers Research Station, Tallahassee, FL.
- Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 8 APR 2019