Complex sentence: The two species are very similar, and recent genetic evidence strongly suggests they should be merged into one species; with "C. lanceolata" being the first name published, this name takes priority when the two are combined.
Split into simpler sentences: The two species are very similar, and recent genetic evidence strongly suggests they should be merged into one species. As "C. lanceolata" was the first name published, this name takes priority when the two are combined.