Lathyrus palustris is a species of wild pea known by the common name marsh pea. It is native to Europe, Asia, and North America. It is a perennial herb with leaves made up of oval-shaped or oblong leaflets a few centimeters long. It has branched, coiled tendrils. The plant bears an inflorescence of two to eight pinkish purple pea flowers each up to two centimeters wide. The fruit is a dehiscent legume pod. Lathyrus linifolius is native to Europe, parts of Asia and North America. Its typical habitat is in rich ground and this plant is found in damp meadows, on river banks, on the margins of ponds, by lakes and near the sea, and occasionally in coastal hedgerows. It often seems to grow among reeds.