Re-Inventory of plant collection: original source and potency of phytoacumulator in Purwodadi Botanical Garden

Abstract

The Purwodadi Botanical Garden is one of Indonesia's most important ex situ conservation centers, preserving the diversity of tropical lowland dry-area plants. A reinventory of collections was carried out to update biodiversity data and assess species' potential to support further research programs, particularly the development of local phytoaccumulator plants. This study aims to analyze changes in collection composition between 2024 and 2025, examine the geographical distribution of collection origins across Indonesia, and identify plant species with potential as phytoaccumulators . Data analysis revealed an increase in the number of species from 1,833 in 2024 to 2,623 in 2025, while the number of specimens decreased from 11,061 to 10,195. Family-level diversity showed several dominant families that contributed substantially to the rise in species numbers. The geographical distribution of collections was visualized on a map of Indonesia to illustrate the regional origins of the collected species. In addition, six local plant species with potential as phytoaccumulator were identified, namely Pterocarpus indicus, Cerbera manghas, Spathodea campanulata, Mimusops elengi, Albizia saman, and Polyalthia longifolia, which can be utilized in phytoremediation and environmental conservation programs. The results of this study represent an initial step toward creating a database of local phytoaccumulator species in Indonesia and providing a foundation for further research and collection management focused on ecological function and sustainability.