Complex sentence: In these works Linnaeus used a third name as a variety within a species and this was sometimes a "cultivated" variety, still written in Latin, and some of these Latin cultigen variety names have persisted to this day.
Split into simpler sentences: In these works Linnaeus used a third name as a variety within a species and this was sometimes a "cultivated" variety, still written in Latin. Some of these Latin cultigen variety names have persisted to this day.