Juncus ranarius Songeon & E.P. Perrier. Subgenus: Agathryon. Section: Tenageia. Common name: Frog Rush. Phenology: Jun-Nov. Habitat: Coastal sands and salt marshes. Distribution: NF (Labrador) south to ME, MA, and DE; Europe. The American distribution is sometimes considered to be as an introduction from Europe.
ID notes: J. ranarius can only be mistaken for J. bufonius or depauperate J. tenuis. J. ranarius can be distinguished from J. tenuis by its small stature and inflorescence beginning just a few inches above the ground. Very similar to J. bufonus (see key).
Origin/Endemic status: Native
Synonymy ⓘ: = Can, K4, NY, Kirschner (2002b); = Agathryon ranarium (Songeon & E.P.Perrier) Záv.Drábk. & Proćków — Proćków & Záveská Drábková (2023); = Juncus bufonius L. var. halophilus Buchenau & Fernald — C, F, G, Mo1; = n/a — Tat; < Juncus ambiguus Guss. — AqW; < Juncus bufonius L. — FNA22, Pa, Kirschner (2002b)
Links to other floras: < Juncus bufonius - FNA22
Wetland Indicator Status:
- Great Plains: OBL (taxonomic split from wetland indicator species)
- Midwest: FACW (taxonomic split from wetland indicator species)
- Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)
Heliophily ⓘ: 9
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