Aggressive, thorny shrubs that produce edible berries. Black raspberry (Rubus occidentalis) has blue-green stems, long, arching canes and dark purple berries. Dried blackberry leaves used for tea. Note: This resource on this edible plant is intended as general information only. As with any foods, there is a potential for allergic reactions when consuming native edibles. Always seek the advice of a health professional with any questions about touching or eating any plant matter.