Columnar fruit trees represent a specific group of cultivars defined by genetically fixed habit (especially in apple trees due to the dominant Co gene from the 'Wijcik' mutation) or targeted selection. Botanically, they are characterized by strong apical dominance, extremely short internodes, and the absence of long lateral branches. Fruiting occurs on short brachyblasts directly on the terminal (trunk), creating a compact shape. In stone fruits, these are often varieties with naturally narrow growth (spur types) rather than true genetic columnarity. Nutritionally and phytochemically, the fruits are qualitatively identical to the common forms of the species.
