Juncus coriaceus Mackenzie. Subgenus: Agathryon. Section: Steirochloa. Leathery Rush. Phen: Jun-Sep. Hab: Stream and pond margins, swamps, flatwoods depressions, roadside ditches. Dist: S. NJ to c. peninsular FL, west to e. TX, north in the interior to KY, AR, and OK.

ID notes:When immature, J. coriaceus is distinguished from other species by the appearance of a lateral inflorescence, but with an additional bract at the base of the flowers in addition to the continuation of the stem, which is the true bract. When mature, J. coriaceus is sometimes confused with members of section Genuini (species with lateral inflorescence) but distinguished the presence of cauline leaf blades.

Origin/Endemic status: Endemic

Synonymy: = AqW, Ar, C, ETx1, F, FNA22, G, GW1, K1, K3, K4, NcTx, RAB, Tat, Tn, Va, W, WH3, Kirschner (2002b), Kirschner (2002c); = Agathryon coriaceum (Mack.) Záv.Drábk. & Proćków – Proćków & Záveská Drábková (2023); = Juncus setaceus Rostk. – S, misapplied

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACW
• Eastern Mountains and Piedmont: FACW
• Great Plains: OBL
• Midwest: FACW

Heliophily: 7