"Sniffing" the air, [dodder] seedlings can even identify preferred tomato-plant hosts over less desirable ones such as wheat, researchers from Pennsylvania State University in University Park report in today's issue of the journal Science. (Related:"Weird Plants Taking Root in Everyday Gardens" [August 2003].)

"This is a pretty cool example of plants behaving in a way that people think only animals behave," ecologist Richard Karban told the journal. Karban, of the University of California, Davis, was not involved in the study.

Link.

Link to a gallery of "weird looking" plants.

'Weird' according to Nat'l Geographic.