Brook Flatsedge vs coast amaranth

Cyperus bipartitus compared with Amaranthus pumilus

Key Differences

• Brook Flatsedge is Not Evaluated while coast amaranth is Extinct.

Taxonomic Classification

Rank	Brook Flatsedge	coast amaranth
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Liliopsida (Monocots)	Magnoliopsida (Dicots)
Order	Poales (Grasses)	Caryophyllales (Caryophyllales)
Family	Cyperaceae	Amaranthaceae
Genus	Cyperus	Amaranthus
Species	Cyperus bipartitus	Amaranthus pumilus

Evolutionary Relationship

Brook Flatsedge and coast amaranth share a common ancestor at the Phylum level: Magnoliophyta. (Flowering Plants)

Conservation Status

Brook Flatsedge

NE — Not Evaluated

coast amaranth

EX — Extinct

Physical Characteristics

Attribute	Brook Flatsedge	coast amaranth
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Flatsedge

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Distributed across Canada, Colombia, and United States.

coast amaranth

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found in Japan.

Brook Flatsedge

The Brook Flatsedge (Cyperus bipartitus) is a species in the genus Cyperus. Typically found in grasslands, wetlands, forests, and cultivated landscapes. Distributed across Canada, Colombia, and United States.

coast amaranth

Coast amaranth (Amaranthus pumilus) is an annual herb in the family Amaranthaceae, native to the Atlantic and Gulf coasts of the eastern United States, where it once grew on coastal foredunes, beach strand, and shell-hash substrates above the high tide line from New York south to South Carolina. It is a low-growing, fleshy plant with small, rounded leaves and inconspicuous green flowers typical of the genus. Coast amaranth is assessed as Extinct in the Wild by the IUCN, as it has not been reliably documented from wild populations since the mid-20th century; the last confirmed collections date to the 1960s. The species' decline and likely extinction resulted from intense human pressure on Atlantic coastal habitats through shoreline development, beach stabilisation, vehicular traffic on beaches, and increased storm frequency disrupting pioneer dune vegetation. It is federally listed as Threatened in the United States, though this listing predates confirmed extinction in the wild. A small number of ex-situ accessions may exist in botanical garden collections. Genetic material and seed banking efforts represent the only remaining conservation options for this critically reduced species.