Lüdtke, R. and Aguiar, A. C. A. de (2008) “A note about the occurrence of reduced petals in species of Polygala L. subgenus Hebeclada (Chodat) Blake (Polygalaceae) from southern Brazil”, Biota Neotropica. Sao Paulo, Brazil, 8(1). Available at: //www.biotaneotropica.org.br/BN/article/view/385 (Accessed: 28 June 2025).