This morning seven had opened (the most I'd had simultaneously before had been 3). Here are two photos from 7 AM and 10.30 AM. When I was in Apulia last September, I saw this plant growing robustly from the gaps between the leaf stumps of palm-trees. My palms already have various self-sown ferns, wild violets, and even a few oaks growing in these cracks. I think I'll try stuffing a few epiphyllum leaves there....
