The first time I saw this amazing spider it was late morning, but I have been back a couple of times and she hasn't moved much (if at all.) In fact, she seems utterly imperturbable, and doesn't respond to having her leaf moved around. I say "she" because this appears to be a female bolas spider of some kind. Since there aren't any matching photos here on BugGuide, I submitted these images to www.whatsthatbug.com. The kind folks who wrote in to that site were inclined to believe this is in the Mastophora genus, but no one knew the species.