Arisaema pusillum is a species of flowering plant in the arum family Araceae.

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

The specific name pusillum, which means "very small, slender",[3] describes the overall size of the plant relative to that of the more common Arisaema triphyllum.

[8] Peck's description was based on a specimen collected by Fred Thorne in Millbrook, New York, also in 1897.

[5][12][13][14] Arisaema pusillum is found primarily in the eastern United States, from Louisiana and Mississippi, northward to New York and southern New England.

[6] In the southeastern United States, it is common throughout the Appalachian Mountains, from northern Alabama to West Virginia.