Tropicals & Tender Perennials: Can someone identify this mystery Epiphyllum?, 1 by Careywood360

Careywood360 wrote:
Good morning! I am hoping that an epiphyllum expert on this forum can give me some help identifying my mystery epi. This plant was given to me by a dear lady who has since passed on. She thought it was a Christmas cactus and had given up on it ever blooming. So had I and was about to send it to the compost heap when it first bloomed for me about two years ago. I've been enchanted ever since. I now have a second one and fear that I've fallen prey to another gardening addiction! Anyway, if someone recognizes this beauty and can give me her name, I'd be most appreciative.

Thanks very much!