Common name: tropical nutrush
Synonyms and Other Names: Ophryoscleria microcarpa (Nees von Esenbeck ex Kunth) Nees von Esenbeck; Scleria foliosa C. Wright, in Sauvalle; Scleria microcarpa Nees von Esenbeck ex Kunth, var. foliosa C. B. Clarke; Scleria microcarpa Nees von Esenbeck ex Kunth, var. subeggersiana Kükenthal ex O. C. Schmmidt
Lamedera, Navajuelo (Dominican Republic)
available through www.itis.gov
Identification: According to Affonso et al. 2015:
Stems/Roots: Rhizomatous perennial herb, 0.5-1.5 m erect, with 1-3 mm wide culm (not the attached leaf blade) that is unbranched.
Leaves: Sheath around the culm is 2.5-4.5 cm long and winged. Ligules are absent. Blades are 5-20 cm long. Both sheath and blade are 0.5-1.0 cm wide.
Flowers: Terminal and axillary inflorescences contain perfect (bisexual) flowers.
Fruits/Seeds: Fruits are smooth, white achenes that are exposed.
Look-a-likes: Scleria lacustris C. Wright shares similar habitat with S. microcarpa, but has unexposed achenes and winged sheathes as wide as the culm.
Size: 0.5-1.5 m height; 2.5-4.5 cm wide leaves (Affonso et al. 2015)
Native Range: Caribbean (Barbados, Cuba, Dominican Republic, Haiti, Jamaica, Panama, Puerto Rico, and Trinadad and Tobago) and South America (Brazil, Colombia, French Guiana, Guyana, Peru, Suriname, and Venezuela) (Orli et al. 2016).
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Scleria microcarpa are found here.
Table last updated 10/18/2021
† Populations may not be currently present.
Life history: Mature Scleria microcarpa flower and fruit throughout the year (Axelrod 2011)
Habitat: Scleria microcarpa are found in swamps and lake shores (FNAI 2018)
Community: Associated species include Taxodium sp. (Wunderlin et al. 2018)
Status: All populations established in the Kissimmee drainage, Florida
References: (click for full references)
Affonso, R., A. Zanin, N.A. Brummitt, and A.C. Araújo. 2015. Diversity of Scleria
(Cyperaceae) in Santa Catarina, Brazil. Rodriguésia 66(2):353-367. http://dx.doi.org/10.1590/2175-7860201566206.
Axelrod, F.S. 2011. A systematic vademecum to the vascular plants of Puerto Rico. Botanical Research Institute of Texas, Ft. Worth, TX.
Florida Natural Areas Inventory (FNAI). 2018. Scleria microcarpa. Florida Natural Areas Inventory, Tallahassee, FL. http://fnai.org/Invasives/Scleria%20microcarpa.pdf.
Orli, S., R. Russell, M. Toner, and E. Gardner. 2016. United States National Herbarium (US). Department of Botany, Smithsonian Institution, Washington, DC. http://botany.si.edu/.
Wunderlin, R.P., B.F. Hansen, A.R. Franck, and F.B. Essig. 2018. Atlas of Florida Plants. [S.M. Landry and K.N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa, FL. http://florida.plantatlas.usf.edu/.
Revision Date: 3/11/2019
Pfingsten, I.A., 2021, Scleria microcarpa Nees ex Kunth: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=3053, Revision Date: 3/11/2019, Access Date: 10/19/2021
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.