The leaves give it the name fishbone cactus or zig-zag cactus but it is the flower that is the prize. It is not really a cactus but a type of epiphyllum. Disocactus (Epiphyllum) anguliger is native to the forests of Mexico and the flowers only come on mature plants, typically in early summer. This plant was started as a single cut frond given to me by R. Gale three years ago. This is its first ever flower and it has arrived in winter. It will only last 1 day.