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Juncus tenuis Willdenow. Subgenus: Agathryon. Section: Steirochloa. Path Rush, Slender Rush, Poverty Rush. Phen: Jun-Sep. Hab: Dry or moist soil along roadsides and paths, fields. Dist: NL (Labrador) west to AK, south to FL, TX, CA, and n. Mexico; Central and South America; introduced widely around the world.

ID notes: Similar to J. anthelatus but the heads are more congested on shorter inflorescence branches. Distinguished from J. dichotomus, J. dudleyi, and J. interior by the long membranous auricle.

Origin/Endemic status: Native

Taxonomy Comments: J. tenuis as it is here treated includes J. tenuis var. williamsii Fernald, which has a more congested inflorescence with arched to recurved inflorescence branches.

Synonymy ⓘ: = AqW, Ar, ETx1, FNA22, Il, K3, K4, Mi, NcTx, NE, NY, Tn, Va, Kirschner (2002b), Kirschner (2002c); = Agathryon tenue (Willd.) Záv.Drábk. & Proćków – Proćków & Záveská Drábková (2023); < Juncus tenuis Willd. – G, GrPl, GW1, K1, RAB, S, Tat, Tx, W, WH3; < Juncus tenuis Willd. var. tenuis – C, Meso6, Mo1, Pa, WV; > Juncus tenuis Willd. var. tenuis – F; > Juncus tenuis Willd. var. williamsii Fernald – F

Links to other floras: = Juncus tenuis - FNA22

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC
  • Eastern Mountains and Piedmont: FAC
  • Great Plains: FAC
  • Midwest: FAC
  • Northcentral & Northeast: FAC

Heliophily ⓘ: 6

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image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Keith Bradley | Original Image ⭷
image of plant© Thomas Gyselinck, some rights reserved (CC BY), uploaded by Thomas Gyselinck source CC-BY | Original Image ⭷
image of plant© Thomas Gyselinck, some rights reserved (CC BY), uploaded by Thomas Gyselinck source CC-BY | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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