Common Water-Parsnip vs greater water-parsnip

Sium suave compared with Sium latifolium

Key Differences

• Common Water-Parsnip is Least Concern while greater water-parsnip is Vulnerable.

Taxonomic Classification

Rank	Common Water-Parsnip	greater water-parsnip
Kingdom same	Plantae (tumbuhan)	Plantae (tumbuhan)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order same	Apiales (Apiales)	Apiales (Apiales)
Family same	Apiaceae	Apiaceae
Genus same	Sium	Sium
Species	Sium suave	Sium latifolium

Evolutionary Relationship

Common Water-Parsnip and greater water-parsnip share a common ancestor at the Genus level: Sium.

Conservation Status

Common Water-Parsnip

LC — Least Concern

greater water-parsnip

VU — Vulnerable

Physical Characteristics

Attribute	Common Water-Parsnip	greater water-parsnip
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Water-Parsnip

Habitat

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

Range

Distributed across Canada, Mexico, Norway, Taiwan, and United States.

greater water-parsnip

Habitat

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

Range

Distributed across Belgium, Chile, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Water-Parsnip

<em>Sium suave</em>, commonly known as the common water parsnip or hemlock water parsnip, is a perennial wetland herb in the family Apiaceae. It is classified as Least Concern by the IUCN and is distributed across a wide geographic range that includes Canada, the United States, Mexico, Norway, and Taiwan, reflecting its adaptability to temperate and subtropical freshwater margins. The species typically grows in marshes, wet meadows, stream banks, and shallow water, rooting in saturated soils with stems partially submerged. It produces pinnately compound leaves with serrated leaflets and bears flat-topped white flower clusters called umbels in mid to late summer. <em>Sium suave</em> can reach heights of one to two meters and is often found in dense stands along slow-moving waterways. Despite its common name suggesting edibility, the plant contains toxic alkaloids and should not be consumed. The roots are particularly toxic and have been historically confused with edible water parsnip, posing a risk to foragers. Biological traits including average lifespan, stem height details, and mass remain poorly documented in standardized databases. Ecologically, common water parsnip provides nesting and foraging cover for wetland birds and mammals, and its umbel flowers attract a diversity of pollinators. The plant plays a structural role in freshwater riparian plant communities across its broad North American and Eurasian distribution.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway