Juncus gymnocarpus Coville. Subgenus: Agathryon. Section: Juncotypus. Seep Rush. Phen: Jul-Sep. Hab: Bogs, seeps, streambanks and riverbanks (especially just below waterfalls). Dist: Local, distributed in four disjunct area: mountains of e. PA; southern Blue Ridge of w. NC, e. TN, nw. SC and ne. GA; southern end of the Ridge and Valley in Bibb County, AL; and Coastal Plain of sw. GA, s. AL, s. MS (Sorrie & Leonard 1999), and w. Panhandle FL. In the Appalachians, J. gymnocarpus is scattered in mountain bogs and seeps throughout the mountain region of nw. NC, ne. TN south to nw. SC and n. GA; it reaches its most general occurrence in the escarpment gorge region of Transylvania, Macon, and Jackson counties, NC, where it also occurs along streambanks, especially just below waterfalls.

ID notes: Among all species with a lateral inflorescence, J. gymnocarpus is easily distinguished by the short tepals at the base of the mature capsules.

Origin/Endemic status: Endemic

Synonymy: = AqW, C, F, FNA22, G, GW1, K1, K3, K4, Pa, RAB, S, Tn, W, WH3, Kirschner (2002b), Zika (2013); = Agathryon gymnocarpum (Coville) Záv.Drábk. & Proćków – Proćków & Záveská Drábková (2023)

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Wetland Indicator Status:

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

Heliophily ?: 6