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Juncus interior Wiegand. Subgenus: Agathryon. Section: Steirochloa. Inland Rush. Phen: Late Apr-Oct. Hab: Calcareous prairies, disturbed sites. Dist: OH west to SK, south to e. TN, AL (Sorrie & LeBlond 2008), MS (Sorrie & LeBlond 2008), LA, TX, and NM.

ID notes: Distinguished from J. anthelatus and J. tenuis by the shorter, rounded, scarious auricles. Distinguished from J. dudleyi by having brown drab auricles and distinguished from the very similar J. dichotomus by its lighter tan capsules. This is among the most difficult group of species to distinguish.

Origin/Endemic status: Native

Synonymy: = Ar, ETx1, F, FNA22, G, GrPl, Il, K4, NcTx, S, Tn, Tx, W, Kirschner (2002b), Kirschner (2002c); = Agathryon interior (Wiegand) Záv.Drábk. & Proćków – Proćków & Záveská Drábková (2023); > Juncus interior Wiegand var. interior – K1, K3; < Juncus tenuis Willd. – GW1; < Juncus tenuis Willd. var. tenuis – C

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Wetland Indicator Status:

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

Heliophily ?: 9

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image of plant© Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick source CC-BY | Original Image ⭷
image of plant© Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick source CC-BY | Original Image ⭷
image of plant© Nathan Aaron, some rights reserved (CC BY), uploaded by Nathan Aaron source CC-BY | Original Image ⭷
image of plant© Nathan Aaron, some rights reserved (CC BY), uploaded by Nathan Aaron source CC-BY | Original Image ⭷
image of plant© Nathan Aaron, some rights reserved (CC BY), uploaded by Nathan Aaron source CC-BY | Original Image ⭷

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