Variety confirmed (probably var. fissa, as I recall) by specimen in the 1990s (MICH, UARK). Found at the intersection of Tenn. Highway 96 and Natchez Trace Parkway, NW corner at end of walkway overlook from parking area. The general area was not searched further for additional plants. Obviously dominant in understory over at least 1/4 acre.

Longest blades more than 2.5 times as long as the average culm length. Largest blades up to 1.9 mm wide. All culms upright, ranging 5-10 cm long (avg. 8 cm long). Lowest internode of inflorescence 3-4 mm long. Staminate spikes up to 7 mm long by 1.4 mm wide, exceeding the nearest pistillate spikes by up to 3.5 mm. Staminate scales with a narrow white band between the reddish color on margins and the green midribs.

Found along the Ozark Highlands Trail (here known as David's Trail) near the eagle nest. This species is easy to tell from C. umbellata once you see the difference. In short, this species has all spikelets on separate stalks. In C. umbellata, the spikelets are "sessile" in the sense that all originate without separate stalks clustered at the tip of one stalk. Compare it to a closed fist (C. umbellata) and an open fist (C. reznicekii) with fingers sticking out and it is easy to remember. I have spread the inflorescence to make this easier to see.

ELC1123 Carex lurida x Carex lupulina
Perigynia less than 2% with a developed achene. Perigynia on the right, compared with those of nearby Carex lurida. Growing alongside Carex lupulina. With @elbourret and Eran Kilpatrick. Specimen vouchered, deposited at herbarium MT.