[], (Noun)

Definitions:
- A shrub of eastern North America, Spiraea tomentosa (family Rosaceae), having woolly stems and tall spires of pink flowers and sometimes an invasive weed of pastures (also called steeplebush); any of several other plants of this genus, especially the similar S. douglasii of western North America.


Phrases:

Origin:
early 19th century; earliest use found in Jacob Bigelow (1786–1879). Probably from hard + hack, the shrub probably being so named on account of the difficulty of clearing it