Diarrhea

Deciduous and Tall Grass Prairie

Coreopsis

• Coreopsis tinctoria
• Found in moist fields 
• active chemical ingredient is alkaloids
• any of a large class of organic, nitrogen-containing ring compounds of vegetable origin and sometimes synthesized, some of which are liquid but most of which are solid, that have a bitter taste, that are usually water-insoluble and alcohol-soluble, that combine with acids without the loss of a water molecule to form water-soluble hydrochlorides, hydrobromides, or the like, and that usually exhibit pharmacological action, as nicotine, morphine, or quinine.(Source)

(Source)

• Root tea for diarrhea and as an emetic(Petersons Field Guide)

Prairie and deciduous:

Cinquefoil

• Potentilla anserina(Source)
• found in dry fields, wet meadows and banks and pastures along with damp marshy fields
• active chemical ingredint is loperamide(Source)
• This medication is used to treat sudden diarrhea(Source)

(Pic Source)

• tea and tincture used for diarrhea

Deciduous:

Ironweed

• Vernonia cinerea(all sources but labeled)
• found in north america
• active chemical ingredient is Palmitic-acid
• Palmitic-acid: a white, crystalline, water-insoluble solid, C 1 6 H 3 2 O 2,obtained by hydrolysis from palm oil and natural fats, in which it occurs as the glyceride, and from spermaceti: used in the manufacture of soap.(Source)

(Source)

• Used for diarrhea, cough, colic, labor pain, ringworm and vermifuge