11.   Two-thirds of its imports of medicinal plants are taken from the wild.

12.   But how much are undiscovered medicinal plants worth?

13.   Europeans used galangal in the Middle Ages, both as a spice and a medicinal plant to aid digestion, banish nausea and minimize flatulence.

14.   For his doctoral research, Plotkin cataloged the medicinal plants of the Tirio tribe in Suriname.

15.   H is for hawthorn and horse chestnut, two medicinal plants poised to be the next best-sellers.

16.   He had no intention of practicing medicine after his residency, and set off on a four-year journey in search of medicinal plants and alternative healing practices.

17.   Here are the ABCs on the ABC and some of the herbs and medicinal plants it champions.

18.   In addition to nature walks, activities include classes on nature photography, medicinal plants, edible plants, organic gardens, insects, butterflies and ecosystems.

19.   In one study, University of Houston researchers are testing medicinal plants from the rain forest for their curative effects.

20.   In Tucson, he joined the faculty of the University of Arizona, continued to study medicinal plants and wrote six books and hundreds of articles about natural medicine.