Spiraea

·noun A genus of shrubs or perennial herbs including the meadowsweet and the hardhack.

spiraea
spīraea, ae, f., = σπειραία, the herb meadowsweet : Spiraea, Linn.; Plin. 21, 9, 29, § 53. ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.