Carex lenticularis Michx. - Lakeshore Sedge


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Carex lenticularis - (image 1 of 6)



Family: Cyperaceae


Section Phacocystis


Wet shores of lakes, rivers, ponds, and streams.




Labrador to AK, south to MA, NY, WI, MN, and CA; also in east Asia.


Tufted perennial with very short or no rhizomes; culms 8-60 cm; leaf blades 1.5-3.5 mm wide, V-shaped in cross-section, with papillae and stomata on both sides, lacking palisades tissue; spikes 3-6, mostly (1-)1.5-5 cm long and rarely much more than 5 mm thick; terminal spike staminate, less often gynaecandrous or with a few basal perigynia; lateral spikes generally pistillate; pistillate scales red-brown to blackish or dark brown, with a broad pale midstrip, often shorter than the perigynia; perigynia 1.7-3.2 mm, somewhat compressed, lanceolate to ovate or broadly elliptic, 2-ribbed and 3-7-nerved on each face, short-stipitate and with a green or pale brown beak 0.1-0.3 mm long, the body typically greenish distally, papillate on the upper third; achene lenticular, whitish-iridescent.


Fruiting July to August

Wetland indicator: OBL

Eastern plants are var. lenticularis; several other varieties occur in the west.


Ball, P.W. and A.A. Reznicek. 2002. Carex, In: Flora of North America Editorial Committee, Eds. Flora of North America North of Mexico. Volume 23. Oxford University Press, New York.


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY




Michael Hough 2018