Orchid flowers (Coelogyne pandurata). The black and green petal on each flower is a specialised petal called a lip. This attracts pollinators and provides them with a landing platform. This is an epiphytic orchid (one that grows in trees). It is found on the islands of Malaysia and Indonesia. This specimen is from Sarawek. There are more than 30,000 species of orchids worldwide, many of which are grown as ornamental flowers.