Merriam-Webster Collegiate Dictionary - rauwolfia

 noun  Etymology: New Latin, from Leonhard Rauwolf died 1596 German botanist  Date: 1752  1. any of a genus (Rauvolfia syn. Rauwolfia) of pantropical trees and shrubs of the dogbane family that yield medicinal alkaloids (as reserpine)  2. the dried root or an extract from the root of a ~ (especially Rauvolfia serpentina of Asia) used chiefly in the treatment of hypertension