coast amaranth vs lizard crystalwort

Amaranthus pumilus compared with Riccia bifurca

Key Differences

• coast amaranth is Extinct while lizard crystalwort is Endangered.

Taxonomic Classification

Rank	coast amaranth	lizard crystalwort
Kingdom same	Plantae (พืช)	Plantae (พืช)
Phylum	Magnoliophyta (Flowering Plants)	Marchantiophyta (ลิเวอร์เวิร์ต)
Class	Magnoliopsida (พืชใบเลี้ยงคู่)	Marchantiopsida (Marchantiopsida)
Order	Caryophyllales (อันดับคาร์เนชัน)	Marchantiales (Marchantiales)
Family	Amaranthaceae	Ricciaceae
Genus	Amaranthus	Riccia
Species	Amaranthus pumilus	Riccia bifurca

Evolutionary Relationship

coast amaranth and lizard crystalwort share a common ancestor at the Kingdom level: Plantae. (พืช)

Conservation Status

coast amaranth

EX — Extinct

lizard crystalwort

EN — Endangered

Physical Characteristics

Attribute	coast amaranth	lizard crystalwort
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.

lizard crystalwort

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

Range

Widely distributed across Europe (5 countries), North America (United States), and Oceania and the Pacific (New Zealand). Currently classified as 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.