In our yard, we have lovely purple lilacs and white lilacs growing together between two small elm trees. In spring they are beautiful. In amoungst them is growing the plant from hell… Oriental Bittersweet. Bittersweet (Celastrus orbiculatus) is one of North America’s most invasive plants. It spreads underground via rhizomes. It will wrap itself around most anything, and destroy whatever is in it’s path. (more…)