Ontario Wildflowers website

Water Parsnip
Sium suave

Other common names: Fragrant Water Parsnip, Hemlock Water Parsnip

Other scientific names: Sium cicutaefolium, Sium latifolium, Sium lineare

French names: Berle douce

Family: Parsley Family (Apiaceae)

Similar species:
  •   Water Hemlock (Cicuta maculata) - very similar; leaves haphazardly-compound; deadly poisonous.

  •   Wild Carrot (Daucus carota) - grows in dry areas; smells like carrot.

  •   Bulb-bearing Water Hemlock (Cicuta bulbifera) - fine feathery leaves.


Flowers: Summer;  White;  5 parts (petals)

Leaves: Alternate, Compound, Toothed

Habitat: Wet Areas

Edible: Edible, but best avoided due to its similarity to the deadly piosonous Water Hemlock (Cicuta maculata).

Books: Newcomb's Wildflower Guide: 222    Peterson's Field Guide to Wildflowers: 52    ROM Field Guide to Wildflowers of Ontario: 132   

Native/Non-native: Native

Status: Common.

Notes: This plant is edible. However it is best avoided due to its similarity in overall appearance, flowers, leaves, and habitat to the deadly poisonous Water Hemlock (Cicuta maculata)!

Origin and Meaning of Names:
 Scientific Name: suave: fragrant


Photographs: 165 photographs available, of which 16 are featured on this page. SCROLL DOWN FOR PHOTOGRAPHS.

Range Map is at the bottom of the page

Water Parsnip (Sium suave)

Overall view of a flowering plant.

Water Parsnip (Sium suave)

Overall view of a non-flowering Water Parsnip. Note the once-compound leaves. Those of the deadly poisonous Water Hemlock (Cicuta maculata) are usually doubly-compound.

Water Parsnip (Sium suave)

A nice view of a whole plant, showing the leaves.

Water Parsnip (Sium suave)

The leaves that are nearest the water take on this form.

Water Parsnip (Sium suave)

Flower umbel. This closely resembles that of the deadly poisonous Water Hemlock (Cicuta maculata)!

Water Parsnip (Sium suave)

Closeup view of some individual flowers, both open and those that are about to open.

Water Parsnip (Sium suave)

Another closeup view, of a flower cluster that is farther along.

Water Parsnip (Sium suave)

Water Parsnip (Sium suave)

Side view of flower umbel.

Water Parsnip (Sium suave)

Closeup of the base of the flower unbel. Note the bracts that curve downwards.

Water Parsnip (Sium suave)

Flower buds.

Water Parsnip (Sium suave)

Base of Water Parsnip and root.

Water Parsnip (Sium suave)

Herbarium specimen showing entire plant, bent over.

(From the collection of the Royal Botanical Gardens Herbarium,Burlington,Ontario).

Water Parsnip (Sium suave)

This herbarium specimen shows the three types of leaves that are found on Water Parsnips. The very fine feathery leaves are those that grow fully underwater. The partially feathery ones grow at the surface. And the "plain" leaves grow above the water's surface.

(From the collection of the Royal Botanical Gardens Herbarium,Burlington,Ontario).

Water Parsnip (Sium suave)

Herbarium specimen showing the entire Water Parsnip plant.

(From the collection of the Royal Botanical Gardens Herbarium,Burlington,Ontario).

Water Parsnip (Sium suave)

Herbarium specimen showing the chambered root stalk.

(From the collection of the Royal Botanical Gardens Herbarium,Burlington,Ontario).


Range map for Water Parsnip (Sium suave)

PLEASE NOTE: A coloured Province or State means this species occurs somewhere in that Province/State.
The entire Province/State is coloured, regardless of where in that Province/State it occurs.

(Range map provided courtesy of the USDA website and is displayed here in accordance with their Policies)