U, V, W, X, Y, and Z
Ulmus fulva Michx. (slippery elm)
The bark was mixed with water and gargled and the root could be dried and chewed to relieve a sore throat.
Ulmas rubra Muhl. (slippery elm; red elm)
The inner bark was boiled and drunk as a laxative.
Urtica gracilis Ait. (nettle)
The root was steeped in water and drank to relieve dysentery. The root was mixed with water and drank to stop urine.
Verbena hastata L. (wild verbena; vervain)
The leaves were boiled and drunk for stomach ache. The flowers were dried and snuffed to stop nosebleeds.
Viburnum acerifolium L. (white oak; arrowwood)
The inner bark was mixed with water and drank to relieve cramps. The inner bark was broken up and put in a cloth in hot water, and squeezed until the water turned green. The water was cooled and then drank as an emetic.
Zanthoxylum americanum Mill. (prickley ash)
The root was mixed with water and either drank or gargled for swelled or ulcerated throat.