A rare Amazonian cactus called the moonflower has bloomed for what botanists believe is the first time in the UK. Experts at Cambridge University’s Botanic Garden kept a night watch throughout the week so that they did not miss the flowering of Selenicereus wittii – an event which usually begins at sunset and is over by sunrise. The moonflower actually bloomed earlier on Saturday afternoon at around 3pm, and the garden said it was 28cm (11.