Dermatitis

Dermatitis 

                                                                                                    Eastern Deciduous Forest 

Wild Yam 
Dioscorea villosa L.

Habitat: Wet woods. 

Seasons: May - August 

Uses: Used for contact dermatitis, brown recluse spider bites, and insect stings. 

Preparation: Poultice. 

Active Chemical Ingredient: Progesterone 

Chemical Structure: 

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

Resources: Foster, Steven, (2014). Field Guide to Medicinal Plants and Herbs of Eastern and Central North America. New York, New York: Houghton Mifflin Harcourt.