Eleocharis acicularis least spikerush Cyperaceae ELAC; Q, cu; R, bm, k;

Eleocharis acicularis plants. By Glen Mittelhauser. Copyright © 2018 Glen Mittelhauser. New England Wild Flower Society. gobotany.newenglandwild.org

Eleocharis acicularis plants in bloom. By Glen Mittelhauser. Copyright © 2018 Glen Mittelhauser. New England Wild Flower Society. gobotany.newenglandwild.org (Accessed 4/2018).

Eleocharis acicularis is a perennial C3 spikerush (Pascal-Antoine 2008), tufted, very small, slender, colonial from rhizomes and stolons, forming carpets, stems filament-like, about 3-12 cm tall, angular, furrowed. 

Leaves bladeless, sheaths only. 

Eleocharis acicularis flower spike. By Marilee Lovit. Copyright © 2018 Marilee Lovit. New England Wild Flower Society. gobotany.newenglandwild.org (Accessed 4/2018).

Flower spike terminal, about 0.5 cm, flattened 3-15 flowers, scales 0.2 cm, midrib papery with greenish, often reddish along margins. 

Fruit a dry achene, pale, 0.1 cm, 3-sided, tipped with hat-shaped tubercle, July-Sept. 

Eleocharis acicularis scales and achenes (fruit). © 2016 MinnesotaWildflowers.info (Accessed 4/2018).

Wetland status: OBL. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Wet, open soil, shores.