the ecology here is based on one of the Ultrascenery swamps - though Alienator pro was used to swap Pamawo hammock palms for another tree type so after the dinosaur renaissance spent all that effort persuading us that sauropods were warm blooded, and suited to dry land habitats why back to the swamps? When flowering plants first evolved they did so as water living plants like water lillies (and a fair few million years went by before land based flowering plants evolved). Compared to the calorific values from eating conifers or cycadoids these easy to digest plants must have had at least some species of dinosaur deliberately seeking them out