Blue star vs Red-knotgrass

Amsonia orientalis compared with Polygonum patulum

Key Differences

• Blue star is Critically Endangered while Red-knotgrass is Not Evaluated.

Taxonomic Classification

Rank	Blue star	Red-knotgrass
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Gentianales (Gentianales)	Caryophyllales (Caryophyllales)
Family	Apocynaceae	Polygonaceae
Genus	Amsonia	Polygonum
Species	Amsonia orientalis	Polygonum patulum

Evolutionary Relationship

Blue star and Red-knotgrass share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Blue star

CR — Critically Endangered

Red-knotgrass

NE — Not Evaluated

Physical Characteristics

Attribute	Blue star	Red-knotgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blue star

Habitat

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

Red-knotgrass

Habitat

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

Range

Widely distributed across Europe (16 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Colombia).

Blue star

The Blue star (Amsonia orientalis) is a species in the genus Amsonia. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.