Certain kinds of plants, like sagebrush and lima beans, are able to pick up on those airborne messages and adjust their own internal chemistry accordingly.
" Oh my, no, " replied the kind old woman. " There's no such thing. These are just plain old lima beans. I bet you'd like some, wouldn't you? " she asked Camilla.
Camilla wanted a big heaping plate full of lima beans more than just about anything, but she was still afraid to admit it. " Yuck, " she said, " no one likes lima beans, especially me."
The other newly mercantar had a different one Colorblindness has thus evolved twice in this group meaning it is probably no accident, but if it is not an accident then how does it help a lima to have?