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Phenological observations at the Botanical Garden of the Adam Mickiewicz University in Poznań were conducted on Syringa komarowii, S. meyeri, S. microphylla, S. oblata, S. reticulata, S. tomentella and S. wolfii. These observations showed the longest foliation phase in the case of S. oblata and S. meyeri, while the longest flowering phase was recorded in S. reticulata, S. microphylla and S. wolfii...
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