Rhynchospora perplexa Britton. Phen: Jul-Sep. Hab: Pine savannas, sandhill seepage bogs, inland in seepage bogs and acidic flatwoods. Dist: E. NC south to ne. FL, FL Panhandle, and west to TX, and north in the interior to ec. TN; West Indies.
Origin/Endemic status: Native
Taxonomy Comments: Var. virginiana Fernald, alleged to be endemic to se. VA, is alleged to differ in several characters, including larger spikelets (2.5-3.0 mm long vs. 2.0-2.5), the achene tubercles broadly rounded at the tip (rather than deltoid and acute). Also see note under R. microcarpa.
Synonymy: = C, ETx1, FNA23, G, GW1, K1, K3, K4, RAB, Tn, Tx, Va, WH3, Bridges & Orzell (2023) in Weakley et al. (2023, in press), Gale (1944), McMillan (2007); = Rynchospora perplexa – S; < Rhynchospora microcarpa Baldwin ex A.Gray – Bah; > Rhynchospora perplexa Britton var. perplexa – F; > Rhynchospora perplexa Britton var. virginiana Fernald – F