Carex tetanica rigid sedge Cyperaceae CATE; Q, cu;

 

Carex tetanica young plant. ~ By Arthur Haines. ~ Copyright © 2017. ~ arthurhaines@wildblue.net

Carex tetanica young plant. ~ By Arthur Haines. ~ Copyright © 2017. ~ arthurhaines@wildblue.net (Accessed 12/2017).

Carex tetanica is a perennial sedge, colonial from rhizomes, tufted, stems often brownish near base, ca 50 ca tall, stem bases leafy and fibrous from old leaf bases. 

Leaves flat, about 0.3 cm wide; thin, green, edges curling backwards in age, shorter than fertile stems; leafy basal bract of inflorescence with well developed sheath. 

Carex tetanica inflorescences. A. A. Reznicek. Herbarium of the University of Michigan. michiganflora.net

Carex tetanica inflorescences. A. A. Reznicek. Herbarium of the University of Michigan. michiganflora.net (Accessed 12/2017).

Flowers: male spikes at top of inflorescence stalk, about 3 cm long; female spikes 1-3, widely separated, erect, about 1-4 cm long, 0.4 cm wide, densely flowered above, more sparse near base, flowers (perigynia) about 0.3 cm long, 0.2 cm wide, angular, tapered at both ends, flower scales brownish, 3-veined with green center, about as long as perigynia, spike not appearing bristly, stalk rough; blooms and fruits May-July. 

Wetland status: FACW. 

Carex tetnica perigynia. L. Curtis. Herbarium of the University of Michigan. michiganflora.net

Carex tetnica perigynia. L. Curtis. Herbarium of the University of Michigan. michiganflora.net (Accessed 12/2017).

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Wet open or part shaded areas.