coast amaranth vs Flat-Leaved Bladderwort

Amaranthus pumilus compared with Utricularia intermedia

Key Differences

• coast amaranth is Extinct while Flat-Leaved Bladderwort is Critically Endangered.

Taxonomic Classification

Rank	coast amaranth	Flat-Leaved Bladderwort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Caryophyllales (Caryophyllales)	Lamiales (Lamiales)
Family	Amaranthaceae	Lentibulariaceae
Genus	Amaranthus	Utricularia
Species	Amaranthus pumilus	Utricularia intermedia

Evolutionary Relationship

coast amaranth and Flat-Leaved Bladderwort share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

coast amaranth

EX — Extinct

Flat-Leaved Bladderwort

CR — Critically Endangered

Physical Characteristics

Attribute	coast amaranth	Flat-Leaved Bladderwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

coast amaranth

Habitat

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

Range

Found in Japan.

Flat-Leaved Bladderwort

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (5 countries) and North America (Canada, United States). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.