Fr: jonc grêle, jonc ténu
Provincial Status: LN
Range: Temp.-Boreal eNA; sw/w/nw/ne/c/eNfld., disj. in cLab.
[=Juncus bicornis Michx.]
[=Juncus bicornis Michx. var. williamsii (Fernald) Vict.]
[=Juncus chlorotichus Schult. & Schult.f.]
[=Juncus germanorum Steud.]
[=Juncus gesneri Sm., nom. illeg. superfl.]
[=Juncus gracilis Sm. 1800, nom. illeg. hom., non Roth 1788]
[=Juncus involucratus Kirk, nom. illeg.]
[=Juncus lucidus Hochst.]
[=Juncus macer Gray]
[=Juncus macer Gray forma williamsii (Fernald) F.J.Herm.]
[=Juncus macer Gray var. williamsii (Fernald) Fernald]
[=Juncus smithii Kunth, nom. illeg. superfl.]
[=Juncus subtenuis Herter]
[=Juncus tenuis Willd. forma williamsii (Fernald) F.J.Herm.]
[=Juncus tenuis Willd. subsp. bicornis (Michx.) P.Fourn.]
[=Juncus tenuis Willd. var. bicornis (Michx.) E.Mey.]
[=Juncus tenuis Willd. var. germanorum (Steud.) Rouy]
[=Juncus tenuis Willd. var. laxiflorus Fiek]
[=Juncus tenuis Willd. var. multicornis E.Mey.]
[=Juncus tenuis Willd. var. nakai Satake]
[=Juncus tenuis Willd. var. tenuis]
[=Juncus tenuis Willd. var. williamsii Fernald]
[=Juncus tristanianus Hemsl.]
[Juncus tenuis is native to eNA, but is an aggressive weed in SA and Eurasia. (T. Ahti, pers. comm., Apr. 2015).]