| MEN | perennial plant of Europe and America having racemes of white or purplish flowers and intensely bitter trifoliate leaves |
|---|---|
| MEN | deciduous shrubs of North America and eastern Asia |
| MEN | straggling shrub of northwestern North America having foliage with a bluish tinge and umbels of small bell-shaped flowers |
| MEN | low shrub of the eastern United States with downy twigs |