Prunus apricots, of cherries, and of plums, all of which have cultivars developed for commercial fruit and nut production. The almond is not a true nut, the edible part is the seed. Other species are occasionally cultivated or used for their seed and fruit. A number of species, hybrids, and cultivars are grown as ornamental plants, usually for their profusion of flowers, sometimes for ornamental foliage and shape, and occasionally for their bark. The Tree of 40 Fruit has forty varieties grafted on to one rootstock. Species such as blackthorn ("Prunus spinosa"), are grown for hedging, game cover, and other utilitarian
Prunus speciosa Prunus speciosa Prunus speciosa, the Oshima cherry, Japanese オオシマザクラ (Oshima zakura), is native to Izu Ōshima island and the Izu Peninsula on Honshū near Tokyo, Japan. "Prunus speciosa" is a deciduous tree typically high. The leaves are 5–10 cm long and 3–6 cm broad, with a double-toothed margin, and an acuminate apex. The flowers are 2.5–4 cm diameter, with five white petals, gold stamens and brown sepals; they grow in clusters in the spring, and are hermaphroditic. The fruit is a small black cherry about 1 cm diameter. A tree 8 m in circumference and 800 years old is known