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Published In: Memoirs of the Torrey Botanical Club 1(1): 6. 1889. (Mem. Torrey Bot. Club) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 9/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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21. Carex eleocharis L.H. Bailey (needleleaf sedge)

Pl. 34 a–d; Map 134

Plants mostly monoecious, with slender, light brown to brown rhizomes. Flowering stems 5–20 cm long, bluntly trigonous, smooth. Leaf blades 3–15 cm long, 0.3–1.5 mm wide, thick, stiffly straight and spreading to ascending or somewhat arching. Leaf sheaths thin at the tip. Heads 5–20 mm long, irregularly ovate to elliptic in outline, the 3–7 spikes 4–9 mm long, 2–6 mm wide, with numerous conspicuous staminate flowers toward the tip and 1–8 perigynia toward the base, the uppermost spikes sometimes entirely staminate. Staminate scales 3.0–3.5 mm long. Perigynia 2.6–3.1 mm long, including the 0.5–1.0 mm long beak, lacking nerves or with several nerves in the basal half on one or both sides, straw-colored, turning dark brown to nearly black at maturity. Fruits 1.6–1.8 mm long. May–June.

Introduced, known only from the city of St. Louis (western U.S. from Iowa west to Oregon and New Mexico; disjunct in northern Illinois and Michigan; Canada; introduced in central Illinois and Missouri). Adventive along railroads.

The American C. eleocharis is often combined taxonomically with the closely related Eurasian species, C. stenophylla Wahlenb., which differs in having somewhat larger perigynia with the ventral surface finely many-nerved.

 
 


 

 
 
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