Chipilín

Crotalaria longirostrata, the chipilín, is a perennial legume that is native to Mexico and Central America. Other common names include chepil, chepilin, chipilin and longbeak rattlebox. Chipilín leaves are a common leafy vegetable in the local cuisines of southern Mexico, including Chiapas, Oaxaca, and Tabasco, and Central America, especially El Salvador and Guatemala. The leaves are high in iron, calcium, magnesium, and beta carotene. They can be boiled and served green, dried and used as an herb, or added to tamale doughs for color and flavor.

Source: Wikipedia