Synonyms and Other Names: Scleria grisbachii C.B. Clarke, Scleria microcarpa Griseb., Scleria mitis P.J. Bergius subsp. eggersiana (Boeck.) T. Koyama, Scleria mitis sensu Britton & Wilson (1923) non P.J. Bergius.
Cortadera, Cortadora, Cortadora de altura, Lambedora
Identification: According to Core (1936):
Habit: emergent, perennial, aquatic gramminoid (sedge)
Stems/Roots: Rhizomatous woody roots, with thick, triangular culms
Leaves: winged sheathes with a slightly pubescent ligule; blades 3-ranked (see sedge), scabrous (rough), 1-2.5 cm wide, >30 cm long
Flowers: paniculate inflorescence at the apex and upper leaf axils; densely cilliated, 3-lobed hypogynium on female flowers
Fruits/Seeds: white, smooth, 2.5-3 mm long achene with glabrous to antrorsely (upward-facing) minute pubescence on the style bases.
Look-a-likes: Scleria microcarpa Nees ex Kunth (tropical nutrush) has smaller achenes and narrower leaves than S. eggersiana (Core 1948). Scleria lacustris C. Wright (Wright's nutrush) has hypogyniums with entire margins (Core 1948). Scleria mitis P.J. Bergius, has style bases with retrorsely (downward-facing) minute pubescence (Koyama 1984).
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 eggersiana are found here.
Table last updated 2/26/2021
† Populations may not be currently present.
Life history: Mature Scleria eggersiana flower and fruit from January-February, May-June, and September-October within its native range (Axelrod 2011), although flowering plants were found in Florida in April and July (Center for Invasive Species and Ecosystem Health 2018, Wunderlin et al. 2018). Seedlings were present and abundant in April in SW Florida (Center for Invasive Species and Ecosystem Health 2018).
Habitat: Scleria eggersiana are found in swamps and cypress domes (FNAI 2018).
Community: Associated species include Taxodium sp. (Wunderlin et al. 2018).
References: (click for full references)
Axelrod, F.S. 2011. A systematic vademecum to the vascular plants of Puerto Rico. Botanical Research Institute of Texas, Ft. Worth, TX.
Center for Invasive Species and Ecosystem Health. 2018. EDDMapS: Early detection and distribution mapping system. The University of Georgia, Tifton, GA. http://www.eddmaps.org.
Core, E.L. 1936. The American species of Scleria. Brittonia 2(1):1-108. https://doi.org/10.2307%2F2804936.
Core, E.L. 1948. The genus Scleria in Colombia. Caldasia 5(21):17-32. https://www.jstor.org/stable/44243577.
Florida Natural Areas Inventory (FNAI). 2018. Scleria eggersiana. Florida Natural Areas Inventory, Tallahassee, FL. http://fnai.org/Invasives/Scleria%20eggersiana.pdf.
Koyama, T. 1984. Cyperaceae of Tropical America: some new or critical species III. Acta Amazonica 14(1/2):105-115. http://www.scielo.br/pdf/aa/v14s1-2/1809-4392-aa-14-s1-2-0105.pdf.
Liogier, H.A., and L.F. Martorell. 2000. Flora of Puerto Rico and adjacent islands: a systematic synopsis. 2nd edition. Editorial de la Universidad de Puerto Rico, San Juan, PR.
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/.
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.