Juncus interior Wiegand. Subgenus: Agathryon. Section: Steirochloa. Common name: Inland Rush. Phenology: Late Apr-Oct. Habitat: Calcareous prairies, disturbed sites. Distribution: 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
Links to other floras: = Juncus interior - FNA22
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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