Atlantic Pouncewort vs coast amaranth

Lejeunea mandonii compared with Amaranthus pumilus

Key Differences

• Atlantic Pouncewort is Vulnerable while coast amaranth is Extinct.

Taxonomic Classification

Rank	Atlantic Pouncewort	coast amaranth
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Marchantiophyta (liverwort)	Magnoliophyta (Flowering Plants)
Class	Jungermanniopsida (Jungermanniopsida)	Magnoliopsida (Dicots)
Order	Porellales (Porellales)	Caryophyllales (Caryophyllales)
Family	Lejeuneaceae	Amaranthaceae
Genus	Lejeunea	Amaranthus
Species	Lejeunea mandonii	Amaranthus pumilus

Evolutionary Relationship

Atlantic Pouncewort and coast amaranth share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Atlantic Pouncewort

VU — Vulnerable

coast amaranth

EX — Extinct

Physical Characteristics

Attribute	Atlantic Pouncewort	coast amaranth
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Pouncewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Portugal. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

coast amaranth

Habitat

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

Range

Found in Japan.

Atlantic Pouncewort

The Atlantic Pouncewort (Lejeunea mandonii) is a species in the genus Lejeunea. It is currently classified as Vulnerable on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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.