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La forma degli acini d`uva e delle gocce di rugiada può illustrare la proprietà isoperim...
A seed of pea (Pisum sativum), a plant belonging to the family of the Papilionaceae. If we...
A compound leaf of Laburnum anagyroides, a wide-spread plant in parks and gardens with poi...
A fig-tree leaf (Ficus carica), this plant has been cultivated in Italy since long time an...
Saxifraga rotundifolia, known as Lady's mantle. If the flower has a three-dimensional pris...
A flower of Plumbago coerulea, a creeper used as an ornamental plant. From the point of vi...
Section of an orange fruit (Citrus sinensis). This photo seems to evoke a dihedral symmetr...
