Juncus biglumis

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

{{Speciesbox

|image=Two-flower_Rush_iNaturalist.jpg

|image_caption=

|genus=Juncus

|species=biglumis

|authority=L.Sp. Pl.: 328 (1753)

|synonyms_ref=

|synonyms=Juncus biglumis var. ajonskensis Novikov

}}

Juncus biglumis, called the two-flowered rush, is a species of flowering plant in the family Juncaceae, native to the subarctic and subalpine Northern Hemisphere.{{cite web |url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:442732-1 |title=Juncus biglumis L. |author= |date=2017 |website=Plants of the World Online |publisher=Board of Trustees of the Royal Botanic Gardens, Kew |access-date=4 February 2021 }}{{cite web |title=Juncus biglumis two-flowered rush |url=https://www.rhs.org.uk/Plants/159440/i-Juncus-biglumis-i/Details |publisher=The Royal Horticultural Society |access-date=4 February 2021 }} It has three divergent genetic lineages that may represent cryptic species.{{cite journal |title=Circumpolar phylogeography of Juncus biglumis (Juncaceae) inferred from AFLP fingerprints, cpDNA sequences, nuclear DNA content and chromosome numbers |year=2007 |last1=Schönswetter |first1=Peter |last2=Suda |first2=Jan |last3=Popp |first3=Magnus |last4=Weiss-Schneeweiss |first4=Hanna |last5=Brochmann |first5=Christian |journal=Molecular Phylogenetics and Evolution |volume=42 |issue=1 |pages=92–103 |doi=10.1016/j.ympev.2006.06.016 |pmid=16905337 }}