Eriochloa michauxii simpsonii Hitchc. (1928:163)
Simpson’s cupgrass, Simpson’s cup grass, Longleaf cupgrass
Taxonomy & Nomenclature
Conservation Status
Missing (Gann et al., 2002:144-145; Gann, 2015:7,146; NatureServe, 2026) or Extinct (Gann et al., 2001-2023 fide Possley et al., 2024; Gann, 2015:137; Knapp et al., 2021; POWO, 2024; Christenhusz & Govaerts, 2025)
Last record: 1966 (Gann et al., 2002:144,145; Gann, 2015:146; Knapp et al., 2021; Christenhusz & Govaerts, 2025)
Distribution & Habitat
Florida (incl. Sanibel Island), USA
Biology & Ecology
Hypodigm
Media
References
Avery, G. N. and Loope, L. L. (1980). Endemic taxa in the flora of South Florida. South Florida Research Center Report T-558. Homestead: Everglades National Park.
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2023). Uitgestorven. Op plantenjacht rond de wereld: 1-511. Sterck & De Vreese.
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2025). Plant extinction in the Anthropocene. Botanical Journal of the Linnean Society 207(3): 183-196. https://doi.org/10.1093/botlinnean/boae045 [Appendix S1]
Clewell, A. F. (1985). Guide to vascular plants of the Florida panhandle. Florida State Univ. Press, Tallahassee, Florida. 605 pp.
Flora of North America Editorial Committee. (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
Gann, G. D. (2015). Vascular Plant Species of Management Concern in Everglades National Park. The Institute for Regional Conservation, Delray Beach. [pp. 145-147]
Gann, George D., Bradley, Keith A. and Woodmansee, Steven W. (2002). Rare Plants of South Florida: Their History, Conservation, and Restoration. Miami, Florida: The Institute for Regional Conservation. xiv + 1056 pp.
Gann, George D., Trotta, L. B., and Collaborators. (2001-2023). Floristic Inventory of South Florida Database [web application]. The Institute for Regional Conservation. Delray Beach, FL, U.S.A. Available at: www.regionalconservation.org/ircs/database/Database.asp [Accessed by Possley et al., 2024 in May 2023]
Govaerts, R. (2001). World Checklist of Seed Plants Database in ACCESS E-F: 1-50919.
Hitchcock, A. S. and Chase, Agnes. (1951). Manual of the grasses of the United States. 2nd edition revised by Agnes Chase. U.S.D.A. Misc. Publ. 200. Washington, D.C.: U.S. Government Printing Office. [Reprinted, 1971, in 2 vols., by Dover Publications, Incorporated, New York.]
Kartesz, J. T. (1994). A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Knapp, Wesley M., Frances, Anne, Noss, Reed, Naczi, Robert F. C., Weakley, Alan, Gann, George D., Baldwin, Bruce G., Miller, James, McIntyre, Patrick, Mishler, Brent D., Moore, Gerry, Olmstead, Richard G., Strong, Anna, Kennedy, Kathryn, Heidel, Bonnie and Gluesenkamp, Daniel. (2021). Vascular plant extinction in the continental United States and Canada. Conservation Biology 35(1): 360-368. https://doi.org/10.1111/cobi.13621 [Supporting Information (Appendix S1)]
Kral, R. (1983). A report on some rare, threatened, or endangered forest-related vascular plants of the South. U.S. Dept. of Agriculture Forest Service Technical Publication R8-TP2, Athens, GA. 1305 pp.
NatureServe. (2026). Eriochloa michauxii var. simpsonii: Longleaf Cupgrass. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed on 26 September 2026]
Possley, J., Lange, J. J., Franck, A. R., Gann, G. D., Wilson, T., Kolterman, S., Duquesnel, J., and J. O’Brien. (2024). First US vascular plant extirpation linked to sea level rise? Pilosocereus millspaughii (Cactaceae) in the Florida Keys, USA. Journal of the Botanical Research Institute of Texas 18(1): 211-223. https://doi.org/10.17348/jbrit.v18.i1.1350
POWO. (2024). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 18 August 2024]
Shaw, R. B. and Webster, R. D. (1987). The genus Eriochloa (Poaceae: Paniceae) in North and Central America. Sida 12(1): 165-207.
Shaw, R. B, Webster, R. D. and Bern, C. M. (2003). Eriochloa. In: Flora of North America Editorial Committee, eds. 1993+, Flora of North America North of Mexico. 19+ vols. New York and Oxford. Vol. 21, pp. 507-515.
Small, J. K. (1933). Manual of the southeastern flora, being descriptions of the seed plants growing naturally in Florida, Alabama, Mississippi, eastern Louisiana, Tennessee, North Carolina, South Carolina, and Georgia. University of North Carolina Press, Chapel Hill, N.C.
Wunderlin, R. P. (1982). Guide to the vascular plants of central Florida. Univ. Presses Florida, Gainesville. 472 pp.
Wunderlin, R. P. (1998). Guide to the Vascular Plants of Florida. Gainesville: University Presses of Florida.
Wunderland, R. P. and Hansen, B. F. (2003). Guide to the vascular plants of Florida, second edition. University Press of Florida, Gainesville, FL.