Japanese cobra lily Arisaema sikokianum

Japanese Jack-in-the-pulpit is an herbaceous flowering plant in the aroid family (Araceae) native to the island of Shikoku in Japan and found in shady, moist woodland sites. The species epithet is Latin for "of Shikoku."

This plant grows 1.5 to 2 feet tall and wide in hummus-rich, moist, well-drained soils in partial to full shade. It is best grown from corms, as plants grown from seed can take 3 to 5 years to bloom. Plant corms 3 to 4 inches deep and leave them undisturbed once established.

The inflorescence is comprised of a spathe, which is a sheathing bract that is dark purple on the outside and white on the inside, and a spadix, which is an unbranched spike of tiny flowers. The spadix is swollen and white, surrounded by the spathe. Blooming occurs in spring. It is the showiest of the plants in the group. The flower may be followed by a cone of red berries in summer.

Use Japanese Jack-in-the-pulpit in a woodland garden, in shade to partial shade, along with other shade-loving plants, as it will go dormant in mid- to late-summer. Use in a cottage or Asian garden theme or in a container. Some people may experience a mild dermatitis when handling the plant.

Insects, Diseases, and Other Plant Problems:  No significant problems. Watch for slugs and vine weevils. 

More information on Arisaema.