Stock photo Handling Arisaema serratum in the forest. Commonly known as the Cobra Lily or Jack in the Pulpit. In this macro image we have a sense of scale with hand touching the Cobra Lily hood. The Arisaema serratum or Arisaemas on the whole are unusual plants and consist of around 250 herbaceous species widely distributed throughout the world. From the tropics to temperate regions. This particular Arisaema serratum was growing at high altitude (1200 metres) in the mountain forests of Japan around Togakushi.