How to Grow a Planet- Growing Confusion?

The 'How to Grow a Planet' series on BBC TV is visually impressive and entertaining but it does not deal especially well with the concept of co-evolution (http://www.bbc.co.uk/iplayer/episode/b01c8b5t/How_to_Grow_a_Planet_The_Power_of_Flowers/). The second episode suggested that flowers had driven the development of colour vision in primates, by using colour to signify ripe fruit. One should note, additionally, that some uses of red mean poisonous rather than ready to eat. Even so, it is extremely unlikely that cones in the retina came about solely as a result of manipulation by flowers. Colour vision is important in other sets of circumstances (finding a mate and locating animal prey) and it is much more likely that the plant's signals and the primate detector systems drove each other in evolutionary terms.