Phyllotaxis
（重定向自Leaf arrangement）
![Crisscrossing spirals of Aloe polyphylla](/Images/godic/202501/23/Aloe_polyphylla_10531.jpg")
![](/Images/godic/202501/23/Whorled0531.png")
![](/Images/godic/202501/23/Spiral_phyllotaxis0531.png")
![Veronicastrum virginicum has whorls of leaves separated by long internodes.](/Images/godic/202501/23/Veronicastrum_virg_album_C0531.jpg")
In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem (from Ancient Greek phýllon "leaf" and táxis "arrangement"). Phyllotactic spirals form a distinctive class of patterns in nature.