Complex sentence: In the United States, "Cynanchum louiseae" has no natural enemies but in its native Europe, "Cynanchum louiseae" has natural enemies such as certain caterpillars, beetles, and diseases.
Split into simpler sentences: In the United States, "Cynanchum louiseae" has no natural enemies. In its native European regions, "Cynanchum louiseae" has natural enemies, such as certain caterpillars, beetles, and diseases.