Citrus | Lime
Citrus aurantiifolia
 
A lime is a citrus fruit, which is typically round, green in color, 3–6 centimetres in diameter, and contains acidic juice vesicles. There are several species of citrus trees whose fruits are called limes, including the Key lime, Persian lime, kaffir lime, and desert lime.
 
All grafted, (nb: images are mature fruit trees).