This study started out at the suggestion of David Liddle of Mareeba, Queensland, Australia. David called and encouraged me to write up the “Section Acanthostemma” since so many of its species were found in the Philippines where I have concentrated my studies. Many species have, over time, been placed in the incorrect section. It has been stated that the sections were useless and that few people understood them. Moreover, they were not being used as study tools in understanding this complex genus. My study of one section soon expanded to the study of all sections and their origin and organization.
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