View photos of the edible and medicinal plant Nuphar polysepala (Yellow pond lily), profiled in Medicinal Plants of the Western Mountain States.

A passage from Medicinal Plants of the Western Mountain States:

The tea makes a soothing and antimicrobial gargle for sore throats. As a sitz bath, use it as an antiinflammatory astringent for cervical and vaginal irritations. If there is a bacterial or fungal element (Candidiasis) consider Yellow pond lily a specific treatment. Here it is best used both internally and externally.