Of course, the stars of the show are the dinosaurs. However, in the first film there is a reference by Laura Dern's character about a plant species having been extinct since the Cretaceous, just at the start of the first Brachiosaurus scene (I think the original novel mentioned extinct vegetation too but it's been a long time since I read it). I'd be interested to know whether there might eventually be some ability to populate enclosures with recreated extinct plant species more contemporary with the dinosaurs and the respective periods they lived in rather than simply rely on modern species.