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Juncus debilis

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Juncaceae
Genus: Juncus
Species: Juncus debilis

Juncus debilis A. Gray

Juncus acuminatus var. debilis (A.Gray) Engelm., A. Gray, Manual, ed. 5: 542 (1867)
Juncus polycephalus var. depauperatus Torr., Fl. New York 2: 327 (1843)
Juncus radicans Schltdl., Linnaea 18: 442 (1844), nom. rejic.

Native distribution areas:

Continental: Northern America
'Regional: Southeastern USA
USA (Alabama, Arkansas, Connecticut, District of Columbia, Delaware, Florida, Georgia, Illinois, Kentucky, Louisiana, Massachusetts, Maryland, Missouri, Mississippi, North Carolina, New Jersey, New York, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Virginia)
'Regional: Mexico
Mexico (Chiapas, Oaxaca)
Continental: Southern America
'Regional: Central America

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
Primary references

Gray, A. 1848. A Manual of the botany of the Northern United States: from New England to Wisconsin and south to Ohio and Pennsylvania inclusive, (the mosses and liverworts by Wm. S. Sullivant,) arranged according to the natural system. BHL Reference page. : 506–507.

Additional references

Kirschner, J. & al. (2002). Juncaceae Species Plantarum: Flora of the World 6-8: 1-237, 1-336,1-192. Australian Biological Resources Study, Canberra.


Govaerts, R. et al. 2022. Juncus debilis in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 Mar 05. Reference page.
Hassler, M. 2022. Juncus debilis. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2022. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2022 Mar 05. Reference page. 2022. Juncus debilis. Missouri Botanical Garden. Published online. Accessed: 05 Mar 2022.
International Plant Names Index. 2022. Juncus debilis. Published online. Accessed: Mar 05 2022.
2022 05 – Taxon details on Integrated Taxonomic Information System (ITIS).

Vernacular names
English: weak rush

Juncus debilis, the weak rush, is a plant indigenous to the United States. It is listed as endangered in Massachusetts and New York, and as threatened in Rhode Island.[1] It is listed as a species of special concern in Connecticut and believed extirpated in that state.[2]

"Plants Profile for Juncus debilis (weak rush)". Retrieved 2 December 2017.
"Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 2 January 2017. (Note: This list is newer than the one used by and is more up-to-date.)

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