A woody plant(Spiraea tomentosa)of eastern North America, having leaves with rusty down on the undersides and spikelike clusters of small, rose - purple flowers.

• 绒毛绣线菊一种产于北美东部生有下侧为铁锈色的叶子和成串的呈玫瑰紫色的穗形小花的木本植物（绒毛绣线菊绣线菊属）