Hmm, it sure looks a lot like the one in your picture, Lin but the ones in your links have wavy leaflets, and coppery color on the new growth, and mine doesn't.
Leaflets are straight as an arrow.
It's been growing and the clump increasing all summer, but the longest frond is still under 2ft. as well. Of course it maybe a bit stunted given it's growing between stones on a wall of the waterfall.
