Galium buxifolium is a rare species of flowering plant in the coffee family known by the common names box bedstraw and island bedstraw. It is endemic to the Channel Islands of California, where it is known from about 26 populations on two of the islands. It is a federally listed endangered species of the United States. This is a small shrub reaching one half to 1. 2 meters in maximum height. It has leathery rounded leaves in whorls of four about its stems and white flowers. The floral biology of the plant is unusual. It is generally dioecious, but it may have unisexual and bisexual flowers on one plant, or all female or all bisexual flowers on a single plant. It can reproduce sexually or vegetatively by sprouting new plants from its root crown. The fruit is a hairy nutlet.