Juncus articulatus L.
  • Sp. Pl.
  • Lachán na ndamh

Cite taxon page as 'WFO (2021): Juncus articulatus L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000775879. Accessed on: 18 Sep 2021'

General Information

Plants perennial, tufted or rhizome creeping, (10--)15--40(--60) cm tall. Stems terete, 0.8--1.5 mm in diam. Cataphylls absent to 2. Cauline leaves 2--6; leaf sheath auricles well developed, acute, free part ca. 2 mm, membranous; leaf blade terete or somewhat laterally compressed, 2.5--7.5(--10) cm × 0.8--1.4 mm, perfectly septate. Inflorescences usually broad; branches rigid, spreading; involucral bract erect to ascending, 0.7--3 cm; heads 5--30, hemispheric to toplike, 5--10(--15)-flowered. Perianth segments reddish brown with greenish midvein, lanceolate, 2.5--3 mm, subequal, apex acute. Stamens 6, 1/2--3/4 as long as perianth; filaments 0.7--0.9 mm; anthers oblong, 0.5--1 mm. Capsule dark brown, shiny, trigonous ovoid, 3--3.5 mm, apex sharply acute and tapered to a conspicuous tip. Seeds ovoid, 0.5--0.7 mm, reticulate. Fl. Jun--Jul, fr. Aug--Sep. 2 n = 80.

  • Provided by: [A].Flora Of CHina @ efloras.org
    • Source: [
    • 1
    • ]. 

    Herbs, perennial, rhizomatous to nearly cespitose, 0.5--6(--10) dm. Rhizomes 2--3 mm diam., not swollen. Culms erect to decumbent (and floating), terete, 1--3 mm diam., smooth. Cataphylls 1, maroon to straw-colored, apex acute to obtuse. Leaves: basal 0--2, cauline (1--)3--6; auricles 0.5--1 mm, apex rounded, scarious; blade green to straw-colored, terete, 3.5--12 cm x 0.5--1.1 mm. Inflorescences terminal panicles of 3--30(--50) heads, 3.5--8 cm, branches spreading; primary bract erect; heads 3--10-flowered, obpyramidal to hemispheric, 6--8 mm diam. Flowers: tepals green to straw-colored or dark brown, ovate to lanceolate, 1.8--3 mm; outer tepals with apex acute or acuminate; inner tepals with apex acute acuminate to obtuse; stamens 6, anthers equal to filament length. Capsules exserted ca. 1 mm beyond perianth, chestnut brown to dark brown, imperfectly 3-locular, ellipsoid or ovoid, 2.8--4 mm, apex acute proximal to beak, valves separating at dehiscence. Seeds obovoid, 0.5 mm, not tailed. 2n = 80.

  • Provided by: [C].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    "Stems usually erect, rather closely set on a coarse rhizome, 1–6 dm, with chiefly cauline lvs, these 2–4, the blade mostly 2–15 cm × 0.7–1.5 mm, terete, aerenchymatously hollow, septate-nodulose; infl broadly ovoid to depressed, with divergent to widely ascending branches, up to nearly twice as long as wide, with few to many obpyramidal to subhemispheric, 3–10-ld glomerules; fls eprophyllate; tep lanceolate to lance-subulate, (2–)2.5–3 mm, subequal (or the pet a bit longer than the sep), the sep acute to subacuminate, the pet more often obtuse; stamens 6; fr unilocular, chestnut-brown to purple-brown, exsert, sharply ovoid-trigonous, tapering in the distal half, 2.5–4 mm, acute or seldom obtuse below the mucronate tip; seeds 0.5 mm; 2n=80. Bogs, wet meadows, and shores; circumboreal, s. in our range to R.I., W.Va., s. O., n. Ind., and Minn. A form with creeping stems, rooting at the nodes is rarely found."

  • Provided by: [I].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Perennial, shortly rhizomatous, greenish herb, (10-) 15-50 (-80) cm tall, erect to almost prostrate, sometimes rooting from the lower nodes, non-stoloniferaus; stem terete, faintly sulcate with 2-6 cauline leaves. Leaves shorter than stem linear transversely 15-25 septate-nodose, subterete, green, usually 1-2 mm broad; basal sheaths usually brownish, auricled. Inflorescence terminal, often richly and somewhat dichotomously branched, with many shortly stalked heads, each consisting of (4)6-10(-12) flowers, 5-10 mm across; lowest bract erect, usually c. half as long as the inflorescence, leafy. Flowers (2-)2.5-3 mm long, brownish to greenish, sessile; perianth segments lanceolate, acute inner subobtuse with broad whitish margins. Stamens 6, much shorter than the perianth, with anthers c. as long as the filaments. Capsules 34 mm long, 1.5-2 mm broad, oblong-ovoid or ellipsoid, usually contracted abruptly into a short beak, conspicuously exceeding the perianth, brownish to greenish, often lustrous, many seeded (3040); seeds c. 0.4(-0.5) mm long, ovoid or ellipsoid, brownish 2n=80.

  • Provided by: [D].Flora of Pakistan
    • Source: [
    • 5
    • ]. 


    Stängel 20–60 cm hoch und 1–2 mm dick, mit 1–3 über den Stängel verteilten Blättern. Diese im Querschnitt oval. Sterile Triebe anders als fertile, am Grund beblättert. Blütenstand endständig, locker, mit wenigen bis vielen, 3–10blütigen Köpfen, 5–2

  • Provided by: [B].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 4
    • ]. 


    6–8. Nasse, kiesige bis schlammige Böden, Flachmoore, kollin-subalpin(-alpin). CH.

  • Provided by: [B].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 4
    • ]. 

    Distribution Map

    • Native distribution
    Found in
    • Europe Northern Europe Ireland


    Nationally Preferred Names

    Lachán na ndamhIrishIE
    Jointed rushEnglishIE

    Other Local Names

    Jonc articuléFrenchCH
    Giunschla articuladaRaeto-RomanceCH
    Giunco nodosoItalianCH
    Jointed rush

     Information From

    Flora Of CHina @ efloras.org
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • A Missouri Botanical Garden
    Flora Helvetica – Illustrierte Flora der Schweiz
    Flora Helvetica – Illustrierte Flora der Schweiz, Konrad Lauber, Gerhart Wagner, Andreas Gygax. Haupt Verlag 2018.
    • B All Rights Reserved
    Flora of North America @ efloras.org
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Flora of North America Association
    Flora of Pakistan
    Flora of Pakistan. Missouri Botanical Garden. Accessed on Jun. 2020.
    • D Missouri Botanical Garden
    Irish Vernacular Names
    • E All Rights Reserved
    International Union for Conservation of Nature
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • F All Rights Reserved
    International Union for Conservation of Nature v.3
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • G See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    World Flora Online Data. 2017.
    • H CC0 1.0 Universal (CC0 1.0).
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • I Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    World Flora Online consortium
    World Flora Online Data. 2018.
    • J CC0 1.0 Universal (CC0 1.0).