Tài liệu tham khảo WikiPedia: Prestonia http://zipcodezoo.com/Plants/P/Prestonia_amazonica... http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl... http://apps.kew.org/wcsp/synonomy.do?name_id=16530... http://www.theplantlist.org/browse/A/Apocynaceae/P...