I have a confession to make. Occasionally, some of my plants get a bit neglected. One of those plants is my Epiphyllum 'David W. Grant.' During the fall/winter, it hangs in the spare room where we keep our cats' litter boxes, a room where I am disinclined to spend a lot of extra time. So I occasionally forget to water it. Not only that, the room has only a north window, which is not an ideal situation for an Epi. It is a bright room though, and it does get additional light reflected off of the off-white siding of the house next-door.
And how does Mr. Grant reward me for the neglect and less than ideal conditions? Like this: