From the CO2Science Archive: Solanum dulcamara L. is an invasive vine that seems to grow everywhere. It apparently doesn’t have any fans in the plant naming world since it has been variously called bittersweet, bitter nightshade, felonwort, poisonberry, snakeberry, and blue bindweed. All parts of it are poisonous although Wikipedia reports that incidents of poisoning are rare because the stuff is too bitter to ingest. Which isn’t exactly extravagant praise. But whether we like it or not, we are likely to be seeing more of it. In 2005 and 2006 there were 10 experiments showing that an additional 300 ppm in the air yielded a 46.5% boost in the plant’s growth.