- The commercial harvest of devil's claw (Harpagophytum spp.) in southern Africa: the devil's in the detailsKristine M Stewart
Institute of Applied Ethnobotany, Pompano Beach, FL 33069, USA
J Ethnopharmacol 100:225-36. 2005..The governments of the main range states are working with local communities to develop policies and regulations to protect the species and to determine a sustainable harvest...
- The African cherry (Prunus africana): can lessons be learned from an over-exploited medicinal tree?K M Stewart
Keith and Schnars, P A 6500 North Andrews Avenue, Fort Lauderdale, FL, USA
J Ethnopharmacol 89:3-13. 2003..The species is at the beginning of a transition from an exclusively wild-collected species to that of a cultivated medicinal tree...