The oldest orchid cactus that we have and it seems like the easiest to grow and bloom every year. The large red flowers have shimmering purplish hue inside The large stigma is long and the white stamens look fluffy. This jungle cactus is also known as Epiphyllum ackermannii, Nopalxochia ackermannii. once open, the bloom will last around three days. It can develop fruits as big as marbles, but I tend to pluck the wilted blooms off the stems.