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Lathyrus palustris (Marsh pea)
Bruso, George H.

Lathyrus palustris

Lathyrus palustris L.

Marsh Pea, Marsh Vetchling

Fabaceae (Pea Family)

Synonym(s): Lathyrus myrtifolius, Lathyrus palustris ssp. pilosus, Lathyrus palustris var. linearifolius, Lathyrus palustris var. macranthus, Lathyrus palustris var. meridionalis, Lathyrus palustris var. myrtifolius, Lathyrus palustris var. pilosus, Lathyrus palustris var. retusus, Orobus myrtifolius

USDA Symbol: LAPA4

USDA Native Status: L48 (N), AK (N), CAN (N), SPM (N)

Lathyrus palustris has purple flowers and lanceolate stipules and is found in wet meadows and marshes in much of North America, as well as Eurasia.


From the Image Gallery

5 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Vine

Bloom Information

Bloom Color: Red , Pink , Purple


USA: AK , CA , CT , DC , DE , GA , IA , ID , IL , IN , KY , MA , MD , ME , MI , MN , MO , NC , ND , NE , NH , NJ , NY , OH , OK , OR , PA , RI , SD , TN , TX , VA , VT , WA , WI , WV
Canada: NB , NL , NS , PE


Use Food: EDIBLE PARTS: Peas and very young pods. Collect young pods in early summer and peas slightly later. Do not wash with detergent or sanitizer, only water. (Poisonous Plants of N.C.)
Warning: POISONOUS PARTS: Seeds. Toxic if ingested in large quantities. Symptoms include Lathyrism"": paralysis, slow and weak pulse, shallow breathing, convulsions. Toxic Principle: Amine, phenol, and glycoside. (Poisonous Plants of N.C.)
Conspicuous 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.

Additional resources

USDA: Find Lathyrus palustris in USDA Plants
FNA: Find Lathyrus palustris in the Flora of North America (if available)
Google: Search Google for Lathyrus palustris


Record Modified: 2013-12-16
Research By: TWC Staff

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