Aeschynomene virginica

Aeschynomene virginica is a rare species of flowering plant in the legume family known by the common names Virginia jointvetch and sensitive jointvetch. It is native to a small section of the East Coast of the United States, where it has a fluctuating annual global population scattered in about 20 mostly small occurrences. Counts and estimates revealed two populations in New Jersey including several thousand individuals, one population of a few hundred plants in Maryland, several variable and unstable populations in ditches in North Carolina, and several populations including about 5000 individuals in Virginia. Habitat alteration has reduced the number of sites where the plant can grow. The plant became a federally listed threatened species of the United States in 1992. Some confusion has occurred in the literature, specifically that this species is named as a noxious weed of soybean and rice fields. The weedy species in question is actually Aeschynomene indica, not the rare and threa......read more on Wikipedia.