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.
Commelina tuberosa Commelina tuberosa is an herbaceous plant in the dayflower family native to Mexico but grown worldwide as an ornamental plant. It is characterized by its purple-splotched spathes with free margins, its bright blue petals of equal size, its tuberous roots, and its four to ten flowered lower cymes. In the wild, it is encountered in moist fields, open forests, or pine-oak forests. The species is sometimes considered to include the species "Commelina coelestis", "Commelina dianthifolia", and "Commelina elliptica", such as in the Flora Mesoamericana. When these are treated as separate, they are often referred to as the ""Commelina tuberosa" complex". Horticulturally, the species are often treated as separate entities because of their differing habits and leaf shapes. In this sense, "Commelina tuberosa" is a low-growing plant with long narrow leaves.