From Simple English Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Crisscrossing spirals of Aloe polyphylla

Phylotaxy or phylotaxis is the mode of arrangement of leaves on the stem of a plant (from Ancient Greek phýllon "leaf" and táxis "arrangement").

Phyllotaxy has a function: it avoids over-crowding of leaves, and exposes the leaves to the most sunlight for photosynthesis. The four main types of phyllotaxy are alternate, opposite, ternate and whorled.