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.
Pittosporum tenuifolium Pittosporum tenuifolium is a small evergreen tree, up to 10 m , native to New Zealand, commonly known as kōhūhū and black matipo, and by other Māori names "kohukohu" and "tawhiwhi". It is sometimes grown under the cultivar name 'Nigricans', so called because of its black stems. In horticulture it is valued for its coloured foliage (cultivated variations include purple, "silver" and variegated leaves), and for its tolerance of some horticulturally difficult growing conditions, including dry soils and shade (although in northwest Europe, cold and exposed situations do not suit it). The flowers generally go unnoticed because of their colour, a very dark reddish-purple, and are scented only at night. It is found growing wild in coastal and lower mountain forest areas up to an altitude of 900m.