Branching shrub to 1 m; lvs firm, often revolute, articulate at the base, linear to narrowly oblong, 2–4 cm × 3–8 mm; fls 2–3.5 cm wide, in small cymes of 3–7 terminating the branches; stamens very many, distinct; styles (4)5; fr (4)5-locular, narrowly ovoid, 7–10 mm, the style-base persistent as a slender beak; 2n=18. Dunes and rocky shores about Lakes Erie, Huron and Michigan; inland in c. Wis. and along the Ottawa R. in Que. Late June–Aug.