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Classification System: APG IV

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

Familia: Juncaceae
Genus: Juncus
Species: Juncus mertensianus

Juncus mertensianus Bong., 1832

Juncus duranii Ewan
Juncus ensifolius var. minor E.Mey.
Juncus mertensianus var. duranii (Ewan) F.J.Herm.
Juncus mertensianus var. filifolius Suksd.
Juncus mertensianus subsp. mertensianus
Juncus slwookoorum S.B.Young

Native distribution areas:

Continental: Northern America
Alaska, Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Saskatchewan, Utah, Washington, Wyoming, Yukon
Continental: Asia-Temperate
'Regional:Eastern Asia
Aleutian Is., Japan, Kuril Is.

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

Bongard, A.G.H. v., 1832. Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2(2): 167

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 mertensianus in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 Mar 07. Reference page.
Hassler, M. 2022. Juncus mertensianus. 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 07. Reference page. 2022. Juncus mertensianus. Missouri Botanical Garden. Published online. Accessed: 07 Mar 2022.
International Plant Names Index. 2022. Juncus mertensianus. Published online. Accessed: Mar 07 2022.
USDA, ARS, Germplasm Resources Information Network. Juncus mertensianus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 2022 Mar 07.

Vernacular names
English: Mertens´ rush

Juncus mertensianus is a species of rush known by the common name Mertens' rush or Alaska rush. It is native to much of western North America from Alaska to Saskatchewan to New Mexico, where it grows in wet mountainous areas such as riverbanks and alpine meadows. This is a clumping perennial herb growing from a vertical rhizome. Its smooth, flat stems grow to a maximum height near 40 centimeters. Its few leaves are located at the base and also along the stem. The inflorescence is made up of usually one cluster of many flowers. Each flower has shiny dark brown to black tepals 3 to 4 millimeters long, six stamens with yellowish anthers, and long reddish stigmas t. The fruit is a dark, oblong capsule .

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