According to wikipedia, grass is now believed to be a bit older: > Before 2005, fossil findings indicated that grasses evolved around 55 million years ago. Fin

According to wikipedia, grass is now believed to be a bit older: > Before 2005, fossil findings indicated that grasses evolved around 55 million years ago. Findings of grass-like phytoliths in Cretaceous dinosaur coprolites from the latest Cretaceous (Maastrichtian) aged Lameta Formation of India have pushed this date back to 66 million years ago.[11][12] In 2011, revised dating of the origins of the rice tribe Oryzeae due to findings from the same deposit suggested a date as early as 107 to 129 Mya.[13] Still, that seems surprisingly recent. Ginkgo trees are almost 3x older.