Common brassbuttons vs Delicate Pygmy Rice Rat

Cotula coronopifolia compared with Oligoryzomys delicatus

Key Differences

Common brassbuttons is Not Evaluated while Delicate Pygmy Rice Rat is Data Deficient.

Taxonomic Classification

Rank	Common brassbuttons	Delicate Pygmy Rice Rat
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Asterales (Daisies & Sunflowers)	Rodentia (Rodents)
Family	Asteraceae (Daisy Family)	Cricetidae
Genus	Cotula	Oligoryzomys
Species	Cotula coronopifolia	Oligoryzomys delicatus

Conservation Status

Common brassbuttons

NE — Not Evaluated

Delicate Pygmy Rice Rat

DD — Data Deficient

Physical Characteristics

Attribute	Common brassbuttons	Delicate Pygmy Rice Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common brassbuttons

Habitat

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

Range

Widely distributed across Africa (Morocco), Asia (Japan), Europe (15 countries), North America (Canada, Mexico, United States), and South America (6 countries).

Delicate Pygmy Rice Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Ecuador.

Common brassbuttons

Common brassbuttons (<em>Cotula coronopifolia</em>) is a small annual or perennial herb with a remarkably broad global distribution, occurring across Africa, Asia, Europe, North America, and South America. This species typically inhabits diverse terrestrial environments, often colonizing wet or damp areas such as salt marshes, mudflats, stream margins, and disturbed roadsides. The common brassbuttons has not been formally evaluated on the IUCN Red List. A member of the family Asteraceae, it produces distinctive button-like yellow flowerheads that give the species its common name. Originally native to southern Africa, the species has spread widely and is considered naturalized or invasive in many regions outside its native range. It often thrives in seasonally flooded habitats and tolerates saline soils, demonstrating considerable ecological flexibility. Biological traits of this species remain poorly documented in the scientific literature.