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A heap of leaves. Some leaves evoke a dihedral symmetry of type D1.
Section of the trunk of wistaria (Wisteria sisensis), an ornamental exotic plant. This se...
The leaf of a fern-tree evokes the sensation of symmetry: every leaf is obtained from the ...
Suggestions of radial symmetry in this sunflower. Helianthus annuus is an annual plant bel...
