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Ovaries: A1. P. gaudichaudii; A2. P. arenaria. A3. P. vanphongensis; A4. P. phuquocensis; A5. P. chungana; A6. P. lignosa; A7. P. stylosa. Stipules: B1. P. gaudichaudii; B2. P. arenaria; B3. P. phuquocensis; B4. P. vanphongensis; B5. P. chungana; B6. P. lignosa; B7. P. stylosa. Photographs by V.T. Tran, T.T. Vinh.
