Juncus filiformis

{{Short description|Species of plant in the genus Juncus}}

{{Speciesbox

|image=Juncus filiformis Sturm8.jpg

|image_caption=Botanical illustration

|image2=Juncus filiformis kz1.JPG

|image2_caption=Habit

|status=LC

|status_system=IUCN3.1

|status_ref={{cite iucn |last1=Lansdown |first1=R.V. |year=2014 |title=Juncus filiformis |volume=2014 |page=e.T19619032A19620896 |doi=10.2305/IUCN.UK.2014-1.RLTS.T19619032A19620896.en |access-date=10 December 2024}}

|status2=G5

|status2_system=TNC

|status2_ref={{cite NatureServe |id=2.140874 |title=Juncus filiformis |access-date=10 December 2024}}

|genus=Juncus

|species=filiformis

|authority=L.Sp. Pl.: 326 (1753)

|synonyms_ref=

|synonyms=

• Juncus transsilvanicus Schur
• Juncus trichodes Steud.

}}

Juncus filiformis, called the thread rush, is a species of flowering plant in the genus Juncus, with a circumboreal distribution.{{cite web |url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:442961-1 |title=Juncus filiformis L. |author= |date=2017 |website=Plants of the World Online |publisher=Board of Trustees of the Royal Botanic Gardens, Kew |access-date=18 January 2021 }}{{cite web |title=Juncus filiformis thread rush |url=https://www.rhs.org.uk/Plants/9519/Juncus-filiformis/Details |publisher=The Royal Horticultural Society |access-date=18 January 2021 }} It has been introduced to South Georgia Island. It is typically found in wetlands, on the borders of lakes and streams.{{cite book |chapter=Stem anatomy in monocotyledonous aquatic and wetland plants |title=Anatomic Atlas of Aquatic and Wetland Plant Stems |year=2020 |last1=Schweingruber |first1=Fritz H. |last2=Kučerová |first2=Andrea |last3=Adamec |first3=Lubomír |last4=Doležal |first4=Jiří |pages=466–478 |doi=10.1007/978-3-030-33420-8_75 |isbn=978-3-030-33419-2 |s2cid=213126379 }}