Some Vitis hybrids and cultivars were reported to show disruption in the regularity of the modular, three-node order of two successive tendrils followed by a skip. The V. vinifera var. ‘Grenache’ and ...

Phyllotaxy describes the geometric pattern of leaves and flowers, and has intrigued botanists and mathematicians for centuries1,2. How these patterns are initiated is poorly understood, and this is ...