Arisaema triphyllum (Jack-in-the-pulpit) is a distinctively shaped plant native to the eastern half of the United States.

A. triphyllum grows well in wet, shady areas. It blooms in the spring and grows one to two feet tall. Plants initially produce only male flowers but as they mature they become hermaphroditic. Once mature A. triphyllum will produce a cluster of bright red berries in summer. All parts of this plant are considered toxic to ingest raw, especially its roots which contain calcium oxalate crystals. 

Botanical Name Arisaema triphyllum
Common Name Jack-in-the-pulpit
Family Araceae
USDA Zone 4 thru 9
Light Requirement Part Shade to Full Shade
Season(s) of interest spring, summer
Height and Spread 1-2ft x 1-1.5ft (30-60cm x 30-45cm)
Flower Color Green/Purple
Attracts Wildlife Provides Food for Birds, Rarely Browsed by Mammalian Herbivores
Additional Information Native to Chicago Region.
Location in Lurie Garden Southeast Dark Plate, Southwest Dark Plate, East Dark Plate