Stem. - Weak and reclining, bristly. Leaves. - Lance-shaped, about eight in a whorl. Flowers. - White, small, growing from the axils of the leaves. Calyx-teeth. - Obsolete. Corolla. - Usually four-parted, wheel-shaped. Stamens. - Usually four. Pistil. - One with two styles. Fruit. - Globular, bristly, with hooked prickles.

This plant may be found in wooded or shady places throughout the continent. Its flowers, which appear in summer, are rather inconspicuous, one's attention being chiefly attracted by its many whorls of slender leaves.