Syringa reticulata subsp. pekinensis Syringa reticulata subsp. pekinensis Syringa reticulata subsp. pekinensis (formerly known as "Syringa pekinensis"), also known as the Pekin lilac or the Chinese tree lilac, grows in an open, multi-stemmed form to a height of , with a spread of . They are native to northern China but grow in USDA hardiness zones 3 through 7. It is grown as an ornamental tree in Europe and North America. Pekin lilacs have arching branches and ovate dark green leaves that are long. They have yellowish-white flowers that bloom in panicles up to long. The panicles change over to loose clusters of brown
Yerevan Botanical Garden that almost every plant species native to Armenia was represented in an area of approximately 16 hectares. At the same time, large rose and lily gardens were also created. In addition, there were more regions represented: the Caucasus, North America, Europe, Siberia and East Asia. The majority of the species in the collection belong to the plant families Cupressaceae, Pinaceae, Fabaceae, Caprifoliaceae, Oleaceae and Rosaceae, and the genera Juniperus, Quercus, Syringa and Clematis are particularly well represented. Plants grown in the park which are typical of the Caucasus include Quercus castaneifolia, Hedera helix, Corylus colurna, Juniperus sabina, Parrotia persica, and