American Senna vs Coiled Cassia

Senna marilandica compared with Senna circinnata

Key Differences

• American Senna is Not Evaluated while Coiled Cassia is Least Concern.

Taxonomic Classification

Rank	American Senna	Coiled Cassia
Kingdom same	Plantae (植物)	Plantae (植物)
Phylum same	Magnoliophyta (被子植物門)	Magnoliophyta (被子植物門)
Class same	Magnoliopsida (モクレン綱)	Magnoliopsida (モクレン綱)
Order same	Fabales (マメ目)	Fabales (マメ目)
Family same	Fabaceae	Fabaceae
Genus same	Senna	Senna
Species	Senna marilandica	Senna circinnata

Evolutionary Relationship

American Senna and Coiled Cassia share a common ancestor at the Genus level: Senna.

Conservation Status

American Senna

NE — Not Evaluated

Coiled Cassia

LC — Least Concern

Physical Characteristics

Attribute	American Senna	Coiled Cassia
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

American Senna

Habitat

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

Range

Distributed across Norway, Sweden, and United States.

Coiled Cassia

Habitat

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

American Senna

The American Senna (Senna marilandica) is a species in the genus Senna. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Coiled Cassia

The Coiled Cassia (Senna circinnata) is a shrubby legume in the family Fabaceae, native to inland arid and semi-arid regions of Australia, particularly the mulga woodlands and shrublands of Queensland, New South Wales, South Australia, and the Northern Territory. The common name 'coiled cassia' refers to the distinctive spirally coiled seed pods that develop after flowering—a morphological feature unique among Australian Senna species and immediately recognisable in the field. Plants typically grow 0.5–2 metres tall, with pinnate leaves and bright yellow flowers characteristic of the genus Senna. Like other acacias and legumes in arid Australian landscapes, Senna circinnata contributes to nitrogen fixation in nutrient-poor desert soils through root nodule symbiosis with rhizobia bacteria, benefiting the broader plant community. The species is drought-tolerant and well-adapted to the seasonal rainfall and thin soils of inland Australia, regenerating vigorously after fire and disturbance. It is assessed as Least Concern by the IUCN given its stable populations across a wide extent of occurrence within Australia's arid interior. Coiled Cassia provides browse for kangaroos and other herbivores and cover for small reptiles and birds in shrubland habitats.