Stem glabrous, rarely or pubescent proximal to nodes. Leaf blades 6-17(-20) × 2-8 cm, margins glabrous or ciliate, faces glabrous. 2n = 20. Flowering Jun-Aug. Moist hillsides, waste places, streambanks, sandy lake shores, talus slopes above treeline; 300-1700 m; N.W.T, Yukon; Alaska.