America Bittersweet

Celastrus scandens

Habitat: Tall Grass Prairie, Eastern Deciduous Forest

Seasons: Late spring through early fall

Active Chemical Ingredient

Atropine

https://en.wikipedia.org/wiki/Atropine

Use of specimen: A tea made from the bark when applied topically is used to soothe irritated skin

Source: http://www.bio.brandeis.edu/fieldbio/medicinal_plants/pages/American_Bittersweet.htm