Science News

This talented plant is commonly known as the dodder vine. It's a parasite; tomato gardeners know it and hate it. Here it is at Penn State University — look for the stringy, wiggly thing on the left — sniffing. Notice as it grows from a seedling, it moves in small, lazy circles, like hands groping in the dark, and then, gradually, it leans toward the stalk of the tomato plant — which it then entwines, gouges, sucks and strangles.

http://www.npr.org/blogs/krulwich/2012/05/24/153583873/do-plants-smell-other-plants-this-one-does-then-strangles-what-it-smells