Complex sentence: The ivy was originally English ivy but was later changed to primarily "Parthenocissus tricuspidata"--a combination of what's commonly called, Boston Ivy and Japanese Bittersweet, which can endure the harsh Chicago winters better than its English cousin.
Split into simpler sentences: The ivy was originally English ivy but was later changed to "Parthenocissus tricuspidata". A combination of what's commonly called, Boston Ivy and Japanese Bittersweet, which can endure the harsh Chicago winters better than its English cousin.