I don't think I've ever seen that before on a plumeria!

Well, I've shown it to quite a few experienced Plumeria people and they never have either!

Is it still attached, so the seeds will be viable?

Yes! I am keeping an eye on it; this could ripen any day now.

Really neat!

That's a seed pod? I had no idea WHAT it was.. was trying to figure it out!

It is indeed. The normal seedpods have only two wings, a triple is very rare.

Very interesting. Ive seen lots of plumerias and never once a pod. Just sent this pic to Mom in Hawaii to see what she thinks of this. Thank you for sharing this spectacle.