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Sium suave Walter
Hemlock waterparsnip, Water Parsnip
Synonym(s): Sium cicutifolium, Sium floridanum, Sium suave var. floridanum
USDA Symbol: sisu2
Fragrant, sometimes aquatic plant with flat clusters of tiny dull-white flowers and strongly ridged stems.
The roots of this plant can be boiled and eaten as a cooked vegetable, but because of the plants resemblance to the deadly Water Hemlock (Cicuta maculata), they are best left alone.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Bloom InformationBloom Color: White
Bloom Time: Jul , Aug , Sep
, WY Canada: NB
, PE Native Distribution:
Throughout East, except Arctic; also in much of West. Native Habitat:
Wet meadows and thickets, muddy shores.
Growing ConditionsSoil Moisture: Moist , Wet
BenefitUse Other: Some tribes believed that smoke from common water-parsnip seeds could drive away evil spirits trying to steal a hunters luck. (Kershaw)
Water-parsnip is so similar to its highly poisonous relatives (such spotted water-hemlock), it is better left alone. (Kershaw)
Conspicuous Flowers: yes
Fragrant Flowers: yes
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
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Record Last Modified: 2012-06-20
Research By: TWC Staff