Carex bicknellii perennial 30 cm to 1.2 m tall, tufted.
Leaves: basal leaves bladeless, sheaths membranous above. Leaves of flowering stems with blades 0.2-0.4 cm wide, shorter than inflorescence.
Flower spikes 3-7, egg-shaped, base tapered, stalkless, 0.8-1.8 cm long, silvery-brown or greenish, male flowers at base; perigynia pale tan, about 1 cm long, 0.6 cm wide, very flat, thin, translucent, broadly winged, beak finely toothed, achene lens-shaped; spikes clustered at top of stem; blooming and fruiting May-July.
Wetland status: FACU.
Frequency in NYC: Rare (NYS S2S3, R).
Habitat: Dry fields, thickets, open woods, soil pH 4.5-6.6 (USDA, NRCS 2010).