Eleocharis flavescens  (E. olivacea) bright green spikerush Cyperaceae ELFL; R;

Eleocharis flavescens plant. By Donald Cameron. Copyright © 2018 Donald Cameron. New England Wild Flower Society. gobotany.newenglandwild.org

Eleocharis flavescens plant. By Donald Cameron. Copyright © 2018 Donald Cameron. New England Wild Flower Society. gobotany.newenglandwild.org (Accessed 4/2018).

Eleocharis flavescens is a perennial spike rush, tufted, 30 cm to 1.5 m tall, sheaths white, membranous at top; 

Leaves bladeless, sheaths only. 

Eleocharis flavescens flower spikes. Photo by Max Licher. Consortium of Intermountain Heerbaria. intermountainbiota.org

Eleocharis flavescens flower spikes. Photo by Max Licher. Consortium of Intermountain Heerbaria. intermountainbiota.org (Accessed 4/2018).

Flower spikelets egg-shaped, 0.2-0.7 cm, fewer than 20 scales, scales with brown margins. 

Fruit a dry achene, red-brown to blackish, lens-shaped, 0.1 cm, tubercle pale, cone-shaped, base swollen much smaller than top of achene; May-Sept. 

Wetland status: OBL. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Wet sand of coastal plain, soil pH 4.5-7 (USDA, NRCS 2010).