Life … Plants Vascular Plants Dicots Gentians, Dogbanes, Madders, and Allies Coffees, Bedstraws, and Allies Bedstraws Three-petal Bedstraw Calcareous Three-petalled Bedstraw subspecies Calcareous Three-petalled Bedstraw Galium trifidum subbiflorum Key traits Layer Vines Plant type Perennial Vine Wildflower From USDA PLANTS. Close