Berberis aquifolium “Tall Oregon Grape” Berberidaceae
Tacoma, WA
May 18, 2013
Robert Niese
The roots of these plants are often used to treat Psoriasis and can be found in topical creams such as Relieva. The stems of most members of this family contain a yellow compound called berberine which is both a strong antimicrobial and an excellent dye. Its berries are sometimes used to make barberry wine and can also produce a pleasant purple dye. Eaten alone however, the fruits of most Berberis are bitter and unpalatable.
Northwest Naturalist 