KRACHAI, P., CHANTARANOTHAI, P. and PIWPUAN, N. 2009. Pollen Characteristics of Polygala, Salomonia and Xanthophyllum (Polygalaceae) in Thailand. Tropical Natural History. 9, 1 (Apr. 2009), 27–34. DOI:https://doi.org/10.58837/tnh.9.1.102959.