Tree Architecture Models of the Syzigium Genus Collection at the Purwodadi Botanical Gardens

There are many species of plants in the genus Syzygium. This genus is distinguished by its strong root system, evergreen, sprawling and complex tree crowns and a powerful branching system on the trunk. The vertical structure of Syzygium trees is distinguished by branching a large crown. Based on its characteristics, the genus Syzygium has a great potential in supporting the sustainability of ecosystem balance. The diversity of tree architecture possessed by the genus Syzygium allows Syzygium species to play an active role in soil and water conservation efforts. The aim of this study is to identify various architectural models of trees Syzygium species in the collection of Purwodadi Botanical Garden in order to assess their role in the ecosystem. The method used in this study was to measure the physical characteristics of trees, such as tree height, trunk diameter, and crown area, and to observe the shape of trees, such as stem growth patterns, branching patterns, and direction of branch development. As the result, of the 17 Syzygium tree species selected and in accordance with the research criteria, 7 of them have the Stone model, 3 species have the Scarrone model, 2 species have the Attims model, 2 species have the Petit model, and 1 species each has the Koriba, Massart, and Troll models. Each variation of tree architecture model has different functions to the ecosystem.