High Quality Content by WIKIPEDIA articles! Arisaema sikokianum (Japanese Jack-in-the-Pulpit) is a herbaceous perennial plant. An unusual woodland plant noted for its unmistakable smoky-purple base, snow-white cup and large hood with purple, green and white stripes. Found only in moist, shaded areas in Japan. It is distantly related to Arisaema triphyllum which is common to eastern United States. In home gardens, it is a springtime planting and is often placed with shade-loving hostas and Bleeding hearts.