Flat, open flowers may be accessible to just about any kind of visitor, but those with more complex shapes have co-evolved with their pollinators, and don’t welcome others. This is the case of kudzu, that formidable Asiatic invader. In North America, it propagates mostly through runners and rhizomes because native pollinators can’t handle its flowers, so seeds are seldom produced. In recent years, a large black bee from Asia, the giant resin bee (Megachile sculpturalis), arrived in North America by accident and started spreading across the landscape. Guess what: This bee is a very efficient pollinator of kudzu’s flowers. So, now this invasive can also propagate by seed. Oh, joy!