arrowhead vs coast amaranth

Sagittaria sagittifolia compared with Amaranthus pumilus

Key Differences

• arrowhead is Least Concern while coast amaranth is Extinct.

Taxonomic Classification

Rank	arrowhead	coast amaranth
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Liliopsida (Monocots)	Magnoliopsida (Dicots)
Order	Alismatales (Alismatales)	Caryophyllales (Caryophyllales)
Family	Alismataceae	Amaranthaceae
Genus	Sagittaria	Amaranthus
Species	Sagittaria sagittifolia	Amaranthus pumilus

Evolutionary Relationship

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

Conservation Status

arrowhead

LC — Least Concern

coast amaranth

EX — Extinct

Physical Characteristics

Attribute	arrowhead	coast amaranth
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

arrowhead

Habitat

Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

Range

Widely distributed across Asia (India), Europe (7 countries), North America (Mexico), and Oceania and the Pacific (Australia, Fiji).

coast amaranth

Habitat

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

Range

Found in Japan.

arrowhead

The Arrowhead, Sagittaria sagittifolia, is a species. It is currently assessed as least concern on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

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.