CONCORD, N.H. (AP) — Prints from antique botanical textbooks greet visitors as they enter naturopathic doctor Laura Jones's office on Broadway in Concord.

Each colorful 19th century design, framed and mounted on the wall, has a unique meaning and purpose. There's a drawing of the pink and orange flowers of the turmeric plant, an anti-oxidant Jones said is protective against cancer, helpful for increasing circulation and lessening inflammation.

Just a few inches away is the leafy green frankincense, which aids in treating arthritis and asthma. Nearby is licorice root, which is commonly used by...