Arisaema triphyllum (a-RIS-aye-ma try-FY-lum) Jack-in-the-pulpit Our native Jack-in-the-pulpit is hardier and taller than the showy non-native Jack-in-the-pulpit (A. sikokianum). A. triphyllum can be found throughout forests of the North Eastern United States. Look for it emerging in early spring to take advantage of the still