Calamus vs Rafflesia

Acorus calamus compared with Rafflesia arnoldii

Key Differences

• Calamus is Least Concern while Rafflesia is Endangered.

Taxonomic Classification

Rank	Calamus	Rafflesia
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Liliopsida (Monocots)	Magnoliopsida (Dicots)
Order	Acorales (Acorales)	Rosales (Roses & Allies)
Family	Acoraceae	Rosaceae (Rose Family)
Genus	Acorus	Rosa (Roses)
Species	Acorus calamus	Rafflesia arnoldii

Evolutionary Relationship

Calamus and Rafflesia share a common ancestor at the Phylum level: Magnoliophyta. (Flowering Plants)

Conservation Status

Calamus

LC — Least Concern

Rafflesia

EN — Endangered

Trend: Decreasing ↓

Physical Characteristics

Attribute	Calamus	Rafflesia
Diet	—	Parasite
Average Lifespan	—	5 years
Average Length	—	1.0 m
Average Weight	—	11.0 kg

Habitat & Geographic Range

Calamus

Habitat

Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical coniferous forests within the Indomalayan biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (South Africa), Asia (5 countries), Europe (30 countries), and North America (Canada, United States).

Rafflesia

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 5 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Indonesia and Malaysia. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Calamus

The Calamus (Acorus calamus) is a species in the genus Acorus. It is currently classified as Least Concern on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical coniferous forests within the Indomalayan biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Rafflesia

Rafflesia arnoldii produces the world's largest individual flower, up to 1 meter in diameter. It is a parasitic plant with no roots, stems, or leaves.