I ran into Daniel Mosquin, who suggested that I might want to see the Woodwardia in the Rainforest Garden. He showed me a beautiful photo, which was not able to remember long enough to decide which fern that was. Here are some I found. This is the one I think might be Woodwardia fimbriata, giant chain fern. Could someone confirm that? Of course, I didn't know to look at the back of the leaves for the giant chains. And are these leaves considered double-pinnate? See below; it's Athyrium felix-femina What confused me is this fern that is once-more pinnate than the one above, so 3-pinnate? And what is the name of this? See below; it's Pteridium aquilinum I found a sign near this one, but I'd already twice photographed handy labels that were clearly for the wrong plant. So I'm not trusting labels for plants I can't figure out. But it might be the right one - Matteuccia struthiopteris? Ostrich fern. This ID is right.