What plant containing single-seeded, blue-black drupes is part of the Manilkara zapota family?
Sideroxylon celastrinum Sideroxylon celastrinum is a species of flowering plant in the sapodilla family, Sapotaceae, that is native to Texas and Florida in the United States south through Central America to northern Venezuela and Colombia in South America. Common names include saffron plum and coma. It is a spiny shrub or small tree that reaches a height of 2 - . The dark green leaves are alternate or fascicled at the nodes and oblanceolate to obovate. Greenish-white flowers are present from May to November and are followed by single-seeded, blue-black drupes.
Macroptilium atropurpureum Macroptilium atropurpureum, commonly referred to as "purple bush-bean", or "siratro" is a perennial legume recognized by its climbing dense green vines and deep purple flowers. The plant is indigenous to the tropical and subtropical regions of North, Central and South America, as far north as Texas in the USA and as far south as Peru and Brazil, but it can be found in many tropical regions around the world. Rich in protein, "Macroptilium atropurpureum" is commonly used for cattle pastures intercropped with grass, used in hay, or as a ground cover to prevent soil erosion and to improve soil quality.