Far from the unfeeling and dumb organisms that some people once thought plants were, it was recently discovered that a species of Mimosa can actually learn and remember. Add this to the fact that plants not only hear, but also speak to each other, and it demonstrates that plants display a level of consciousness that modern science has only just begun to understand. From Sci-News.com:
By using the same experimental framework normally applied to test learnt behavioral responses in animals, biologists from Australia and Italy have successfully demonstrated that Mimosa pudica – an exotic herb native to South America and Central America – can learn and remember just as well as it would be expected of animals.