Color, pale yellow. Sepals and petals, 5, pointed, the sepals reflexed, longer than the petals. Fruit, a cluster of achenes armed with a long, recurved hook, whence the common name. Stem, hairy, 1 to 2 feet long, strong, woody. Flowers, panicked in the leaf-axils. Leaves, with long petioles, the lower ones large, all 3-cleft, more or less toothed toward the apex. May and June.

Open woods, common in New England States and southward. Not especially pretty.