Juncus pylaei Laharpe. Subgenus: Agathryon. Section: Juncotypus. Common name: Common Rush. Phenology: Jun-Sep. Habitat: Moist soil, bogs, marshes, swamp forests, margin of streams, ponds, lakes and swamps, low meadows; overlooked and probably more widespread and common than shown. Distribution: Throughout eastern North America, south at least to NC and SC. The mapped distribution is unusually speculative, owing to past lumping with Juncus effusus.

ID notes: Similar to J. effusus but with the stems being coarsely and conspicuously ridged much like a fluted column.

Origin/Endemic status: Native

Synonymy ⓘ: = AqW, C, Can, K4, Mi, NE, NY, Hämet-Ahti (1980), Kirschner (2002b), Zika (2003), Zika (2013); = Agathryon pylaei (Laharpe) Záv.Drábk. & Proćków — Proćków & Záveská Drábková (2023); = Juncus effusus L. var. pylaei (Laharpe) Fernald & Wiegand — Pa; = n/a — Il; < Juncus effusus L. — FNA22, GW1, RAB, S, Va, W; > Juncus effusus L. var. costulatus H.St.John — F, Tat; > Juncus effusus L. var. pylaei (Laharpe) Fernald & Wiegand — F; < Juncus effusus L. var. solutus Fernald & Wiegand — G. Basionym: Juncus pylaei Laharpe 1827

Links to other floras: < Juncus effusus - FNA22

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Wetland Indicator Status:

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

Heliophily ⓘ: 9