Complex sentence: He did considerable fieldwork on Australia's ethnobotany, concentrating on plants that had either a medicinal function or toxic effects.and his papers on these topics are to this day cited by specialists as key works.
Split into simpler sentences: He did considerable fieldwork on Australia's ethnobotany, concentrating on plants that had either a medicinal function or toxic effects. His papers on these topics are to this day cited by specialists as key works.