Problematic Polypodium / Murky Microsorum for ID

This is really annoying, because I know I've seen this before… These are horribly overgrown in 3 gallon pots. Standard Polypodium exposed rhizomes, typical sori, etc, but, of course, the overall form is very different. I don't think I've ever seen a fern this erect before, nor with such oddly twisted pinnae. Did a search through Google and HEAR.org, but still couldn't turn anything up. I want to say I've seen a reference to Florida, maybe? The fern in question is in the first five photos here:

http://s160.photobucket.com/albums/t195/DGuertin/Ferns/

Thanks much all!

Best,

Darryl