1. Botany Division, Research Center for Biology, Indonesian Institute of Sciences, Cibinong Science Center, Cibinong, Indonesia
2. Research Center for Plant Conservation and Botanic Gardens, Indonesian Institute of Sciences, Bogor, Indonesia
3. Tambora National Park, Directorate General of Natural Resources and Ecosystem Conservation, Ministry of Environment and Forestry of Indonesia, Dompu, Indonesia
4. Purwodadi Botanical Gardens, Indonesian Institute of Sciences, Pasuruan, Indonesia
5. Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK