| Hi There I will list some makes/models ;) and a description for you Citrus Aurantium - The Seville or bitter orange is a recognised variety, not just a seedling grown from any orange pip (which normally also produces bitter fruit). The orange red fruit makes excellent marmalade and liqueurs such as Curaçao. The Seville can also be grown as a fine ornamental tree, or can be clipped to form a hedge or tall screen if plants are spaced at intervals of two thirds of the height you want them to achieve, Citrofortunella Microcarpa - The calamondin is said to be the hardiest citrus and is certainly one of the most attractive. The orange or pale pink fruits can be made into marmalade and the flowers are very fragrant. It is a good citrus for pot cultivation and is the one most frequently sold in Europe as an ornamental shrub. Citrus Reticulata - The mandarin is early maturing and the small, sweet, easily peeled fruits are often ready for the picking in early winter. It makes a small round tree, rather densely clad in small dark leaves, that flowers in late spring. Citrus Sinesis - This is the tree that produces the sweet orange and, because of its economic importance, dozens of different varieties have been bred, each with its own particular requirements. Specialist producers in orange growing parts of the world will advise that mature at different dates, and are best suited to the local soils and climate. The two most commonly grown varieties are the Washington Navel and the Valencia, ripening in midwinter and the late spring respectively. All the best and enjoy choosing your tree, I have 4 orange trees in my garden along with lemon, grape, pomegranate, pear, plum, grapefruit, peach and fig :) | 
