Meadow rue Meaning, Definition & Usage

  1. noun any of various herbs of the genus Thalictrum; sometimes rhizomatous or tuberous perennials found in damp shady places and meadows or stream banks; have lacy foliage and clouds of small purple or yellow flowers

WordNet

Definitions
  1. (Bot.), a delicate early plant, of the genus Thalictrum, having compound leaves and numerous white flowers. There are many species.

Webster 1913