Carex fissa Mackenzie var. fissa . Section: [26c] Section 3 Multiflorae. Phen: May-Jun. Hab: Prairie depressions, eastwards introduced in disturbed areas, including roadside ditches, sediment control ponds, and old railroad stockyards (well-established). Dist: S. IL, MO, se. KS, and OK south to AR, se. TX, and TAM. See Simmons, Strong, & Parrish (2008) for additional information about the VA occurrence, and Knapp et al. (2011) and Longbottom, Naczi, & Knapp (2016) about the MD and DE occurrences. McKenzie & Nelson (2022) discussed occurrences in MO.
Origin/Endemic status: Native
Synonymy: = Ar, FNA23, K1, K3, K4, Mo1; = n/a – C; < Carex fissa Mack. – ETx1, GrPl, Il, Mex, NcTx, Mackenzie (1931-1935)