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black flatsedge
Scientific Name: Cyperus niger
Family: Cyperaceae
Category: Monocot
Growth: Graminoid
Duration: Annual, Perennial
Other Names:
Cyperus niger: Black Flatsedge
Cyperus niger, commonly known as black flatsedge, is a sedge species found throughout the Americas.
Considerations for Pets
- This plant produces small, dark brown to black achenes (nutlets) which could present a potential choking hazard if ingested.
Considerations for Children
- This plant produces small, dark brown to black achenes (nutlets) which could present a potential choking hazard if ingested.
Taxonomy and Nomenclature
- Scientific Name: Cyperus niger Ruiz & Pav.
- Family: Cyperaceae (Sedge family)
- Rank: Species
- Synonyms: Mentions *Cyperus niger* var. *castaneus* (Pursh) Kk.,
Common Names
- Black flatsedge
Distribution and Habitat
- Native to the Americas.
- Found in wet areas.
- Present in Orange County, California.
- Not found in Idaho.
Morphological Characteristics
- Fruit/Seed: Dark brown to black achene, broadly ellipsoid, 1.2–1.4 mm long.
- Achene: Dark brown or black, narrowly oblong, .09 to .09 inch, sharply 3-angled, shiny.
- Scales purplish, 2–2.5 mm long with rounded, minutely apiculate tips and obscure veins.
- Flowers: stamens 2 or 3 style 2-branched. Achene obovate, black.
- The fruit is a small achene (nutlet), 1.0-1.5 mm long, 0.6-0.7 mm wide, obovate, triangular in cross section, dark-brown to almost black the surface is almost