Frostbite

Deciduous:

American Beech

• Fagus grandifolia
• found in rich woods
• active chemical ingredient is guaiacol
• 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:

Balsam poplar

• Populus balsamifera
• found in moist soils
• active chemical ingredient is Caffeic-acid(Source)
• Caffeic-acid: :  a yellow crystalline acid C₉H₈O₄ obtained by hydrolysis of chlorogenic acid(Source)

(Source)

• Usebuds considered tonic, stimulant
• Folk remedy(balm) used for sores;tincture for toothaches, rheumatism, diarhhea, wounds.
• Tea used as wash for inflammation, frostbite, sprains, and muscle strain