| any of several shrubs belonging to the genus Spiraea, of the rose family, esp. S. prunifolia, having finely toothed ovate leaves and sprays of small white flowers. |
| bridal wreath or bri·dal-wreath (brīd'l-rēth) n. Any of various shrubs of the genus Spiraea, such as S. prunifolia, having arching branches covered with white bloom. Bridal wreath is popular as an ornamental and in flower arrangements. |