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..2 Perigynia 3.2-4.8 mm long, abruptly narrowed to a short stipe; [native, of northern hardwoods forests in the Mountains of NC and VA]
..2 Perigynia 5-6 mm long, sessile; [alien, rarely naturalized in our area]
......4 Perigynia glabrous, (5.2-) avg. 6.2 (-7.7) mm long
......4 Perigynia puberulent, (6.4-) avg. 7.2 (-8.1) mm long
........5 Perigynia puberulent, (5-) avg. 7 (-9) mm long; pistillate scales usually with the midrib excurrent as a short awn
..........6 Perigynia (6-) avg. 7.0 (-10) mm long, broadest below the middle, tapering with straight or slightly convex sides to a conspicuous beak with a hyaline tip; pistillate scales obtuse; [of swamps, bogs, and other moist to wet habitats, nearly throughout our area]
..........6 Perigynia (4.5-) avg. 5.6 (-7) mm long, broadest near the middle, tapering with concave sides to a short beak lacking a hyaline tip; pistillate scales acute to acuminate (the lowest sometimes aristate); [of dry to moist upland forests and openings in the Mountains]