It looks like Selaginella. I see two called "peacock fern" (though it's not a fern): Selaginella uncinata - peacock moss, peacock spikemoss, blue spikemoss (from Wikipedia) Selaginella wildenowii I don't know how one would distinguish those.
Thank you again, Wendy. It was in a humid tropical conservatory, so I suspect it might be willdenovii. However, the SFBG plant list doesn't have it, though it does list uncinata (outdoors). Looking up this stuff, I just ran across this site: www.centrallakesclinic.biz/garden-ferns/shorter-notes-rsh.html - very informative.