Prunus persica, peach tree, produce juicy peaches and nectarines. Peaches, closely related to almonds, have stones used for marzipan. Nectarines, a genetic mutation, are smooth-skinned peaches. They grow to 3-4 meters, with pink flowers before leaves. Cultivated peaches come as clingstone and freestone varieties. White-fleshed peaches are sweet, while yellow-fleshed ones have tangy sweetness. Peach trees live 8 to 25 years, influenced by disease resistance and winter damage.