This cactus has been with me for over thirty years since our first apartment in West LA. We called it a penthouse but it was more like a trailer on the roof of an apartment building. My cactuses clustered near the slider that was the entrance because it was southfacing. They came with us as we moved to the beach, the peninsula and now to the foothills.
I repotted and broke apart a large plant this spring. This is the piece that is on the back patio. The two pots in the courtyard won't be blooming for a while yet.
I love the ethereal quality of these flowers. I don't like the fact that they only last one day.
This one only has the two buds so after this weekend, no more flowers.