Geum rivale ‘Album’ This is a white form of Geum rivale or Water Avens that grows to 12 - 24 inches high. It blooms in late spring with small nodding greenish white bells held on short wiry stems above a clump of green basal leaves. As the flowers mature, the hanging bells will straighten up. Geum rivale ‘Album’ does best in moist soil and partial shade. It is hardy in zones 3 to 7.