Corolla-lobes and stamens, 3 or more. Styles 2. Flowers, solitary or, when they terminate the branches, in threes. Variable. July to September.

The fruit, as in all the galiums, is a pair of dry seed-vessels, joined at first, separating when ripe into distinct carpels. The square stems are weak, 5 to 20 inches high. They are covered with bristles turning downward, and by this means the plant attaches itself to and lifts itself over other vegetation, often forming dense tangles. A persistent grower, and a plant that may be met with in almost any swampy ground.