Comments: This species has historically been collected from the wild and used for medicinal purposes. Some experts in the medicinal plant industry have suggested that trade is medium to large and demand has increased over the past ten years (Robbins 1999). According to Michael McGuffin, president of the American Herbal Products Association, use of this herb is marginal (pers. comm., January 2001); however it is commercially available and information about efficacy and use is widely available. Sources of commercial products should be monitored to determine whether potential increased demand would affect wild populations.