Salix viminalis
The garden was established circa 1999 for experimental studies in phenology, and named in honor of Venetian botanist Alessandro Marcello. Its mission is to study the influence of various environmental factors on plant growth. To reduce the number of experimental variables, the garden contains 2-4 identical clones of the species "Cornus mas", "Cornus sanguinea", "Ligustrum vulgare", "Robinia pseudoacacia", "Salix acutifolia", "Salix smithiana", "Salix viminalis", and "Sambucus nigra".