Complex sentence: By 1968, Fernandes had accepted 63 species, and by 1990 Blanchard listed 65 species and in 2006 the International Daffodil Register listed 87 species.
Split into simpler sentences: By 1968, Fernandes had accepted 63 species, and by 1990 Blanchard listed 65 species. In 2006 the International Daffodil Register listed 87 species.