And, as the response to your comment notes, grass evolved only very late in the age of the dinosaurs. When you think of the most prevalent varieties of terrest

And, as the response to your comment notes, grass evolved only very late in the age of the dinosaurs. When you think of the most prevalent varieties of terrestrial plant life on Earth today, particularly agricultural crops (wheat, rice, maize, all grasses), much of it is very recent evolutionary developments, and of that, vastly further developed by artificial selection and hybridisation by humans. Legumes are also flowering plants, and seem to date back roughly 79--74 mya: <https://en.wikipedia.org/wiki/Fabaceae#Evolution,_phylogeny_and_taxonomy https://en.wikipedia.org/wiki/Fabaceae#Evolution,_phylogeny_...>