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Thammarong, W., Rakarcha, S. and Rodda, M. 2020. Heterostemma brownii (Apocynaceae), a new record for Laos and Thailand. Thai Forest Bulletin (Botany). 48, 2 (Jul. 2020), 114–117. DOI:https://doi.org/10.20531/tfb.2020.48.2.05.