Isoetes louisianensis Thieret (1973:129)

Louisiana quillwort

Taxonomy & Nomenclature

Possibly a hybrid (I. engelmannii x melanopoda) (Hassler, 2004-2023).

Conservation Status

Rediscovered in 1978 (Lucas & Synge, 1978:39)

Shortly after the species' scientific description in 1973 (Landry & Thieret, 1973), the type locality was destroyed and the species was considered possibly extinct, but thankfully the species was rediscovered just north of there in 1978 (Lucas & Synge, 1978:39).

Distribution

Alabama, Louisiana & Mississippi, USA

Biology & Ecology

Hypodigm

Media

References

Original scientific description:

Landry, G. and Thieret, J. W. (1973). Isoetes louisianensis (Isoetaceae), a new species from Louisiana. Sida 5(2): 129-130.

Other references:

Bray, Rebecca D., Schafran, Peter W., and Musselman, Lytton J. (2018). Interesting, provocative, and enigmatic: Morphological observations on southeastern quillworts (Isoetes Isoetaceae, Lycopodiophyta). Castanea 83(2): 263-269. https://doi.org/10.2179/17-122

Brunton, Daniel F. (2015). Key to the quillworts (Isoetes: Isoetaceae) of the southeastern United States. American Fern Journal 105(2): 86-100. https://doi.org/10.1640/amfj-105-02-86-100.1

Flora of North America Editorial Committee. (1993). Flora of North America north of Mexico. Vol. 2. Pteridophytes and gymnosperms. Oxford Univ. Press, New York. xvi + 475 pp.

Hassler, Michael. (2004-2023). World Ferns. Synonymic Checklist and Distribution of Ferns and Lycophytes of the World. Version 17.2; last update Oct. 18th, 2023. Available at: https://www.worldplants.de/ferns/ [Accessed 21 October 2023]

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.

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.

Larke, J. (1995). Technical/agency draft recovery plan for Louisiana quillwort (Isoetes louisianensis Thieret). U.S. Fish and Wildlife Service, Endangered Species Office, Jackson, Mississippi.

Leonard, S. (2011). Review of quillworts (Isoetaceae) of southeast United States with specific reference to Louisiana quillwort (Isoetes louisianensis). Unpublished report to U. S. Fish and Wildlife Service, Jackson, Mississippi. 39 pp.

Lucas, Grenville Llewellyn and Synge, Hugh (compilers). (1978). The IUCN Plant Red Data Book. Morges, Switzerland: IUCN. 540 pp. [pp. 39-40]

POWO. (2023). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 21 October 2023]

Roskov Y. et al. (eds.). (2018). World Ferns: Checklist of Ferns and Lycophytes of the World. Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.

Sorrie, B. A. and Leonard, S. W. (1999). Noteworthy Records of Mississippi Vascular Plants. Sida, Contrib. Bot. 18: 889-908.

Thieret, J. W. (1980). Louisiana ferns and fern allies. Lafayette Natural History Museum, Lafayette. 123 pp.

Thomas, R. D., and Allen, C. M. (1993). Atlas of the vascular flora of Louisiana. Volume 1: Ferns and fern allies, conifers, and monocotyledons. Louisiana Dept. Wildlife and Fisheries, Baton Rouge. 217 pp.

Troìa, Angelo, Pereira, Jovani B .S., Kim, Changkyun and Taylor, W. Carl. (2016). The genus Isoetes (Isoetaceae): a provisional checklist of the accepted and unresolved taxa. Phytotaxa 277(2): 101-145. https://doi.org/10.11646/phytotaxa.277.2.1

U.S. Fish and Wildlife Service. (1975). Review of Status of Over 3,000 Vascular Plants and Determination of "Critical Habitat". Federal Register 40(127): 27823-27924.

U.S. Fish and Wildlife Service (USFWS). (1991). Proposed endangered status for the plant Isoetes louisianensis (Louisiana quillwort). Federal Register 56(205): 52500-52503.

U.S. Fish and Wildlife Service (USFWS). (1992). Determination of endangered status for the plant Isoetes louisianensis (Louisiana quillwort). Federal Register 57(209): 48741-48747.

U.S. Fish and Wildlife Service (USFWS). (2023). Initiation of 5-Year Status Reviews for 67 Southeastern Species. Notice of initiation of reviews; request for information. Federal Register 88(91): 30324-30328.

Walker, Shannon L. (2017). Morphological, Genetic, and Environmental Characterization of an Unusual Population of Isoetes (Isoetaceae, Lycopodiophyta). BSc thesis, The University of Southern Mississippi.

Weakley, A. S. (2015). Flora of the southern and mid-Atlantic states. University of North Carolina Herbarium, North Carolina Botanical Garden, University of North Carolina; Chapel Hill. [relevant reference?]

https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.147932/Isoetes_louisianensis

https://en.wikipedia.org/wiki/Isoetes_louisianensis

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