Orbexilum pedunculatum

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Common Names: Sampson's snakeroot [1]

Orbexilum pedunculatum
Orbexilum pedunculatum IWF.jpg
Photo by John Hilty at IllinoisWildflowers.info
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicots
Order: Fabales
Family: Fabaceae
Genus: Orbexilum
Species: O. pedunculatum
Binomial name
Orbexilum pedunculatum
Natural range of Orbexilum pedunculatum from USDA NRCS Plants Database.

Taxonomic Notes

Synonym: none

Variety: Psoralea psoralioides (Walter) Cory var. elandulosa (Elliott) F.L. Freeman


O pendunculatum is a perennial forb/herb of the Fabaceae family native to North America. [1]


O pendunculatum is found in Florida, Georgia, South Carolina, North Carolina, Virginia, Maryland, and Kentucky. [1]



Open woodlands are the ideal habit for O pedunculatum. [2]

Specimens have been taken from habitats that include dry loamy sands, pinewoods, moist loamy sand of pine flatwoods, longleaf pine wiregrass savanna, oak woodland, oak pine on sandstone, low ridges, open woody area, full sun, prairie, open field, and boggy meadow. [3]


O. pedunculatum has been observed flowering in May and August, with peak inflorescence in June.[4]

Conservation and Management

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 USDA Plant Database
  2. Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  3. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Loran C. Anderson, R.K. Godfrey,Norlan C. Henderson, R.A. Norris, R. Komarek, Rodie White, John B. Nelson, W. M. Whitten, Michael O. Moore, L. Gawin, J. Schmidt, Wilson Baker, Nancy Craft Colie, LK Kirkman, Lynn Hill, Richard Carter, M. Darst, A. Gholson, E L Stone, Sidney McDaiel, Michael B. Brooks, R. Kral, R.M. Kriebel, D. Demaree, Roomie Wilson, Clarke Hudson, D. S. Correll, Helen B. Correll, Samuel B. Jones, K E Blum, R.L. Wilbur, P.L. Redfearn, GF Baker, R.E. Shanks, A. J. Sharp, A. Clebsch, L.H. Chinners, R. Vorris, C.L. Lundell, Amelia Lundell, John W. Thierest, H. R. Reed, Raymond Athey,Arthur Stanley Pease, Scott McCoy, M. Morgan, H.E. Ahles, C. R. Bell, J. Kevin England, Brian R. Keener, William B. Fox, R.L. Wilbur, B. L. Turner, B.E> Smith, R. B. Carr. States and counties: Florida (Liberty, Franklin, Wakulla, Leon), Georgia (Thomas, Grady, Brooks, Liberty, Elbert, Lowndes, Decatur, Lee, Stanley, Emanual, Tift), Alabama (Marshall, Russell, Talladega, Cullman, Marengo) South Carolina (Barnwell, Richland, Darlington, Horry) Tennessee (Grundy, Coffee, Pickett) Louisiana (Vernon, Tangipahoa, Ouachita, Acadia) Mississippi (Clay, Forrest, Newton, Pearl River) Indiana (Jackson, Knox) Arkansas (Garland, Ashley, Conway, Marion, Saline) Texas (Wood, Smith, Upsur) Missouri (St. Clair, Carter, Greene) Kentucky (Trigg, Crittenden) Virginia (Sussex) North Carolina (Halifax, Warren, Scotland, Cumberland, Washington, Martin, Granville, Johnston, Wilson, Bladen, Orange, Franklin)
  4. 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: 24 MAY 2018