Orchid flower (Paphiopedilum venustum). The Paphiopedilum orchids are also called the Venus slipper orchids. Their flowers have a distinctive anatomy: there are two lateral petals sticking out to either side, a pouch-shaped lower petal (called the lip), and a large upwards pointing sepal. The lip attracts and can trap pollinators. This orchid is found in the Himalayas. There are more than 30,000 species of orchids worldwide, many of which are grown as ornamental flowers.