|Photo by the Atlas of Florida Plants Database|
|Division:||Magnoliophyta - Flowering plants|
|Class:||Liliopsida - Moncots|
|Natural range of Eustachys petraea from USDA NRCS Plants Database.|
Synonyms: Chloris petraea Swartz.
E. petraea is native along the southeastern coast of the United States from Texas to North Carolina and Pennsylvania, Puerto Rico, and the U.S, Virgin Islands, and has been introduced to Hawaii and the Pacific Basin.  It is also native south of the United States from Mexico south to Panama.
E. petraea is foud in dune slacks and sand flats, as well as sometimes in disturbed areas.  Specimens have been collected from borders of mesic woodlands, loamy sands, coastal hammock, open pine woods, pond bottom, mangrove flats, palm flatwoods, disturbed sands, river banks, river bottoms, and wiregrass longleaf pine sands. 
Associated species include Dichanthelium aciculare, D. tenue, Sabal palmetto, Quercus laevis, Quercus sp., Pinus palustris, Panicum gymnocarpon, Polygonum densiflorum, Aristida sp., and other various grasses and sedges.
Conservation, cultivation, and restoration
This species is considered vulnerable in the state of North Carolina.
References and notes
- USDA Plant Database https://plants.usda.gov/core/profile?symbol=EUPE9
- Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
- 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.
- [] Lady Bird Johnson Wildflower Center. Accessed: May 13, 2019
- URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Loran C. Anderson, R.K. Godfrey, R.E. Perdue, D.B. Ward, Robert R> Haynes, Gwynn W. Ramsey, R. S. Mitchell, Tom Barnes, Richard Houk, R. Kral, J. P. Gillespie, S.W. Leonard, Robert Lemaire, D.B. Ward, D. Burch, George Cooley, Erdman West, Tom Daggy, Robert lazor, Frank Goul, Dorothy C. Saunders, Wilbur Duncan, Sidney McDaniel, Patrick Brennan, Mabel Kral, R.A. Norris, Richard R. Clinebell II, E. West, L. Arnold, J.A. Duke, Edwin Tyson, K. MacClendon, T. MacClendon, B. Boothe, J. Kartesz, V. Craig, R. Mears, G. Wilder, Wayne D. Longbottom, David Williams, M. Darst, H. Light, J. Good, L. Peed. States and counties: Florida (Dixie, Jefferson, Holmes, Seminole, Calhoun, Liberty, Leon, Citrus, Okaloosa, Monroe, Lee, Osceola, Highlands, Bay, Levy, Palm Beach, Sumter, Madison, Polk, Taylor, Collier, Manatee, Columbia, Indian River, Orange, Lake, Lake, Alachua, Okeechobee, Walton, Gadsden, Wakulla) Georgia (Thomas, Calhoun, Franklin)
- 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: 21 MAY 2018
- [] NatureServe Explorer. Accessed: May 13, 2019