Dalbergia ecastophyllum, commonly known as coinvine or ossa-de-porco, is a sprawling, salt-tolerant leguminous shrub or vine native to coastal regions of the Caribbean, Central America, and northern South America, where it thrives in mangrove margins, brackish swamps, and sandy maritime soils. This species is characterized by its thick, leathery, elliptic leaves that often appear stiff and eucalyptoid—an adaptation to harsh, sun-drenched coastal conditions—along with its tough, woody stems that may form dense, tangled thickets or climb over nearby vegetation. In summer, it produces small, fragrant white to pale cream flowers arranged in short clusters, attracting bees and other pollinators; these develop into distinctive flattened, coin-like pods that inspire its common name and can persist on the plant for long periods. Its extensive root system helps stabilize shorelines, making it ecologically important in protecting coasts from erosion while providing habitat and shelter for wildlife in transitional mangrove ecosystems. Though slow-growing, Dalbergia ecastophyllum is valued for its resilience, its role in ecological restoration, and its production of braziline dye in some regions, reflecting the broader economic importance of the Dalbergia genus.