Question: What plants died out along with the dinosaurs?

Alison Tidy answered on 30 Mar 2023:

Despite extinction events that wiped out the dinosaurs a lot of plants survived and still found today or went extinct only in the last century. Lack of fossil records or interest (e.g amber plant samples were ignored) may mean that lots of plants did go extinct as well but we are simply unaware of them.

One plant that did go extinct probably due to change of climate as it lived in swampy areas was the Lepidodendron treelike plant as was found around 300 million years ago. Interestingly it was originally thought to be lizard skin with its scaly bark and probably why it wasn’t ignored. The trees were tall and thin like telephone poles with grass like leaves at the top and the scaly bark gave it its structure unlike today where tree bark is more for protection.