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Sensitive joint-vetch (Aeschynomene virginica) is named as such because its leaves fold slightly when touched. It inhabits freshwater tidal marshes along the mid-Atlantic coast. It is a robust, annual herb in the pea family and grows up to 6 feet (2 meters) in height. 30-56 slightly hairy leaflets are placed alternately along the stem. Flowers are yellow with prominent red veins and appear in late July flowering into autumn.
They produce fruit, which are segmented pods 2.3 inches (6 cm) long.