I just found your blog today off Plants are the Strangest People Blog.
I had stopped at a garage sale one day looking for pots. I saw an unusual plant and asked the lady if I could have a cutting. She couldn’t find the cutting she thought she had, so she ended up giving me a pot of the plant. She said she did not know the name of it but it has a red flower when it blooms.
So, I have looked thru books and on the internet. I think it is a Epephyllum, but I cannot find one that has a red flower. It looks like Epiphyllum anguliger, but the book says that has a white flower.
Can you tell me what it is? I have attached pics of it.
Thanks for any help you can give me. I looked through your blog all the way back to last May in hopes of finding my plant posted.
What you have there is a Cryptocereus anthonyanus, which is an epiphytic cactus from Mexico, much as the Epiphyllums are, however unlike the Epi’s, there are not 100s of cultivated varieties.
It looks like you have a beautiful specimen with lots of healthy green growth. In general you can treat it like an orchid. They prefer bright indirect light, and we would grow them indoors here in Northern California. Water about once per week, no more than that, and add bloom food in the spring to get those big red flowers.