Section of the trunk of wistaria (Wisteria sisensis), an ornamental exotic plant. This se...
The beautiful geometry of this tree at the Royal Botanic Garden in Sydney (Australia).
View of branches of Picea excelsa, a conifer that lives in high altitude woods.
The problem of the wrapping of circumferences shown in a stack of wood.
La geometria dei fasci di curve ("quasi" circolari) nella sezione di questo tronco.
