Arisaema sikokianum

About

Arisaema sikokianum, the 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 on the Island of Shikoku in Japan, it is closely related to Arisaema triphyllum, which is common to the eastern United States. In home gardens, it is a springtime planting and is often placed with shade-loving hostas and bleeding hearts.

Summary from Wikipedia