Night Stalker
Credit: Jaap Vermeulen

A slender night stalker is one way to describe this rare orchid from Papua New Guinea whose flowers open around 10 p.m. at night and close early the next morning, hence it's common name, night-blooming orchid. Bulbophyllum nocturnum, as it is referred to in its Latin name, is thought to be the first night-blooming orchid recorded among the more than 25,000 known species of orchids.