No, nectarines and peaches do not grow on the same tree. Nectarines and peaches are two different fruits that come from different varieties of trees, even though they are closely related.
No, nectarines are not citrus. Perhaps you are confusing nectarine with tangerine? Citrus fruit include tangerine, citrange, tangelo, orange, pomelo, grapefruit, lemon, lime, citron, and kumquat. Nectarines are just peaches that don't have fuzzy skins. They can even grow on the same tree as regular peaches.
Nectarines are not a product of cross pollination. They are peaches that do not have fuzz. Some peach seeds produce trees that bear fruit that is not fuzzy. Sometimes a peach tree will bear both nectarines and peaches. Growers commonly graft branches from nectarine trees onto peach trees in order to produce nectarines.
Nectarines are a genetic mutation of peaches, in fact growing from genetically mutated peach trees. They are virtually identical fruits except that nectarines are smooth skinned, and peaches are fuzzy.
A nectarine has been selectively bred to have a slick skin with none of the fuzz of a peach. Other than that it's hard to tell the difference. Nectarines are a little more tart, but they taste very similar to a peach. You can use them just like peaches in baking or in making jams and preserves.
to grow peaches
Peaches grow from the flowers on the peach tree.
Peaches grow on trees called Prunus persica, which are known as peach trees. These trees produce juicy, sweet fruits known as peaches, which are popular in many cuisines around the world.
Georgia is not the peach tree state. It's the "Peach State".
Nectarines
The major fruit crop in Mississippi is blueberries. To a lesser extent muscadine grapes, tree fruits (apples, peaches, pears, plums, and nectarines), citrus (kumquat, satsuma, Meyer lemon), blackberries and strawberries are grown in Mississippi.
They each take the same peach?
No. For examples, peaches have large round pits but apple seeds are flatter and more ovoid.