Dermatitis from poison sumac is less common. It is also home to speckled alder and poison sumac. Typical plants include pitcher plants, sundew, cotton grass, and poison sumac. It produces the irritant urushiol much like its close relatives poison sumac and poison oak. Poison sumac grows in the sphagnum bog. Poison sumac fruit are creamy white and part of a cluster. Rhamnose can be isolated from Buckthorn ("Rhamnus"), poison sumac, and plants in the genus "Uncaria". Poison sumac is a shrub or small tree, growing up to nearly in height. Poison sumac is prevalent in the bog area, particularly around the outer edge, the '"moat".