[2] It is a member of the Arisaema triphyllum complex, a group of closely related taxa in eastern North America.

Arisaema stewardsonii is a herbaceous, perennial, flowering plant growing from a corm.

Its spathe tube is strongly fluted (ridged), the only member of the complex with this distinctive character.

[1] Earlier that year, its type specimen was collected in Tannersville, Pennsylvania by Stewardson Brown, Eugene Pintard Bicknell, and Britton.

[3][9][10][11] Arisaema stewardsonii was originally found in eastern Pennsylvania growing in wet woods among Sphagnum mosses,[5] hence the name bog Jack-in-the-pulpit.