Juncus filicaulis

{{Short description|Species of plant}}

{{Speciesbox

|image=

|genus=Juncus

|species=filicaulis

|authority=Buchenau

|synonyms_ref=

|synonyms=

• Juncus pauciflorus var. cheesemanii {{small|Buchenau}}
• Juncus polyanthemus var. cheesemanii {{small|(Buchenau) Buchenau}}

}}

Juncus filicaulis, the thread rush, is a species of flowering plant in the family Juncaceae.{{cite web |url=https://www.yarraranges.vic.gov.au/PlantDirectory/Grasses-Rushes-Sedges/Juncus-filicaulis |title=Juncus filicaulis Thread Rush |author= |date=2023 |website=yarraranges.vic.gov.au |publisher=Yarra Ranges Shire Council |access-date=9 March 2023 }} It is native to southeastern Australia, and it has been introduced to New Zealand.{{cite POWO |id=51633-3 |title=Juncus filicaulis Buchenau |access-date=9 March 2023 }} A perennial reaching {{cvt|45|cm}}, it forms dense tufts.