Poison Ivy

Deciduous:

American Beech

• Fagus grandifolia
• found in rich woods
• active chemical ingredient is guaiacol(Source)
• Guaiacol: a slightly yellowish, aromatic, crystalline substance, C 7 H 8 O 2,resembling creosote and usually obtained from guaiacum resin: used in medicine chiefly as an expectorant and local anesthetic.(Source)
  (Source)

• Chewed nuts as worm expellent. Bark tea used for lung ailment. Leaf tea wash for burns, frostbite, poison ivy rash.(Peterson Field Guide)

Prairie:

Sweetfern

• Comptonia peregrina
• found in dry soil, common weedy shrub
• active chemical ingredient is Betulin(Source)
• Betulin: (biochemistry) A naturally abundant triterpene, commonly isolatedfrom the bark of birch trees, that can be converted to betulinic acid.(Source)

(Source)

• Cherokee used tea of leaves for roundworms; delaware used a wash to treat blisters; also to purify blood
• use leaf tea as tonic beverage or wash for poison ivy rash
• use for sprains, swelling,a nd tuberculosis(Peterson Field Guide)