Does anyone know what this is? The darkest leave in the pot "fell" into my hands at an event over a year ago. As you can see, it has finally rooted and grown. The tip of the leaves grow a tiny leaf that shows that it separates and becomes a new plant. I pulled it off of the first leaf and planted it and it rooted also. In the last few months it has really taken off. You can tell by the shiny green.
It would really be nice to know what it was. It was growing in a huge hanging basket hung on a tree. Sandy

Queen of the Night (Selenicereus grandiflorus) or something related.

(Edited: SongofJoy below is correct.)

Or perhaps Epiphyllum oxypetalum.

Yes, that's the one I was looking for, actually. Thanks.

Queen of the Night (Epiphyllum oxypetalum)

athenssandy!
Yup! That's it! E. oxypetalum
A pretty one too! Looks very happy!

Oh my gosh! It's beautiful in bloom. What can I do to speed up the growth. Is it sorta like an orchid?

Beautiful, yes...but has an incredible scent also. Are you growing it inside? I'm wondering if its scent is as strong indoors.....?

I'm not sure about 'speeding up' growth, but from what I have heard is that they really prefer to be under potted or root bound, and it can be years before they will bloom. I have 2 that were started as cuttings. I've had them about 3 years now…They have been growing really well, but I haven't seen a bloom yet.

but well worth the wait...BTW to ATP