@johncarlosbaez What!? I had no idea, that's fascinating.

I have a running joke about ferns with my son (which he found exciting when younger, now just embarrassing) having watched lots of TV shows about dinosaurs, especially huge sauropods who ate tons of ferns.

"Uh oh, I see some ferns over there. Better watch out for dinosaurs!"

Now we'd better keep an eye out for gametophytes as well.