A rare Amazonian cactus that blooms only once a year for just 12 hours has successfully flowered in the U.K. for the first time, capturing the attention of hundreds of thousands of people around the world who watched the event online. 

The moonflower (Selenicereus wittii) is a rather unusual cactus with a flattened stem that spirals around other trees like ribbons. It grows deep inside a single patch of rainforest in Brazil and flowers for a single night every year, so only a handful of people have witnessed the blooming process in the wild.