Encephalartos horridus:

Few plants have inspired the same amount of frenzy as cycads, particularly Encephalartos. These plants, reminiscent of palms but in no way related, are among the world’s oldest living beings and existed when dinosaurs roamed the earth. Grown to specimen size, the blue-leaved Encephalartos can attain ungodly sums of money with some rarer species said to be worth hundreds of thousands, if not millions of dollars.