Native to Europe, you'll find yarrow growing naturally everywhere in North America except the Southwest. Yarrow helps stop bleeding and counters inflammarion and tissue swelling, so it is of some benefit for wounds, especially those that heal slowly. Some of its phytochemicals ease muscle spasms, making it helpful against menstrual cramps, it also stimulates the gallbladder's release of bile.

Yarrow can also help with gastritis, hemorrhage, liver disease, arthritis, backache, fever, infections, stomach disease, thrombosis, colic, high blood pressure, and rashes.

Dock is one of our more common weeds, a perennial herb with most of its strap-shaped leaves concentrated at the plant's base over a stout yellowish root. Though slightly antibacterial against a few microbes, yellow dock is perhaps most frequently considered a bowel aid that works whichever way you need it. The astringent tannins are of some mild help against diarrhea, while the anthraquinones are gentle laxative.

Yellow dock can help with, constipation, dermatitis, gingivitis, hives, anemia, enlarged lymph glands, jaundice, rhinitis, syphilis, and eczema.

Yerba santa grows in clumps, usually on hillsides in California and northern Mexico. Yerba santa once was a popular, bitter-tasting tonic on the West Coast, and people used to smoke its leaves to alleviate asthma. The essential oil in Yerba santa can help break up congestion, it also eases inflammation and aids in eliminating excess fluid, both of which help relieve arthritis pain. It displays a little anti cancer-action, too. Most of its benefits, like those of many others in the citrus family, lie in its aromatic oil.

Yerba santa can also help with, allergies, asthma, cancer, dermatitis, fever, inflammation, poison ivy, respiratory disease, rheumatism, thrush, tuberculosis, and bronchitis.