Geum rivale is commonly known as water avens. It is native to North America where it thrives on wet, boggy soils or swamps. It does well in in cool, wet areas where little else will thrive. It grows to 18 to 28 inches tall and blooms from late May to early August with 2 – 5 flowers per stem. The small, half inch flowers are reddish or orangey pink, nodding and bell shaped. It is hardy in zones 3 to 7. The specific epithet means “growing by streams”. If plant rhizomes are boiled in water, the resulting liquid has a faint taste of chocolate, hence the common name of chocolate root.