Data mode


Sign up

Copy permalink to share

Juncus longii Fernald. Subgenus: Juncus. Section: Graminifolii. Long’s Rush. Phen: Jun-Aug. Hab: Usually in very wet, often inundated sites, bogs, ditches, rooting in clay or peat. Dist: MD south through VA, NC, SC to s. MS and se. LA (Urbatsch 2013), mainly in the Coastal Plain; disjunct inland in boggy sites, as in w. NC, nc. GA, TN, and n. AL (Knapp & Naczi 2008, more extensive distributions are based on misattribution).

ID notes:Among section Graminifolii, which is recognizable by the flat leaves lacking septae and rounded capsules in heads (glomerules), J. longii has a very dense and congested inflorescence. The rhizomes are long with well-spaced rhizome scales.

Origin/Endemic status: Endemic

Taxonomy Comments: See Knapp & Naczi (2008) for clarification of the Juncus marginatus complex.

Synonymy: = AqW, F, K1, K3, K4, RAB, Tn, Va, Knapp & Naczi (2008); = Juncus aristulatus Michx. var. aristulatus – S; = n/a – Tat; < Boreojuncus marginatus (Rostk.) Záv.Drábk. & Proćków – Proćków & Záveská Drábková (2023); < Juncus biflorus Elliott – C, G; < Juncus marginatus Rostk. – FNA22, GW1, WH3, Kirschner (2002b)

Show in key(s)

Show parent genus

Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL

Heliophily: 9

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷


See something wrong or missing on about Juncus longii? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.)

Cite as...