Carex planispicata

Naczi (1999) describes Carex planispicata as a species, distinct from C. amphibola, which is retained by FNA (2002, vol. 23) and Weakley and the Southeastern Flora Team (2025). Kartesz (1994) treated this taxon as C. amphibola var. rigida, which is equivalent to C. planispicata according to Weakley and the Southeastern Flora Team (2025) and FNA (2002, vol. 23), which notes, "Until its description, Carex planispicata was long treated as C. amphibola or C. amphibola var. rigida (R. F. C. Naczi 1999)." It was questionably synonymized into C. amphibola by Kartesz (1999).

Carex planispicata is relatively wide ranging and frequent throughout most o its range. Occurring in much of the eastern U.S.A. It ranges from central New Jersey southwestward to southern Indiana, southern Indiana, southeastern Missouri, and southeastern Oklahoma south to central Georgia, southern Mississippi and southeastern Texas. Found in mesic deciduous forests, usually on the lower portions of slopes adjacent to streams and on the upper portions floodplains. It usually grows in acidic to nearly neutral loams, silt loams, and sandy loams.

Carex planispicata is relatively wide ranging and frequent throughout most of its range. Occurring in much of the eastern U.S.A. It ranges from central New Jersey southwestward to southern Indiana, southern Indiana, southeastern Missouri, and southeastern Oklahoma south to central Georgia, southern Mississippi and southeastern Texas (Naczi 1999).