In Mr.Burgevin's paper reference is made to this spiraea, and a suggestion made that it is related to the well-known "Queen of the Prairie" Spiraea lobata. The writer was favored with a plant, through the kindness of Mr. Downing, and it proved to be a case of dimorphism, known in other plants, but not we believe in this genus of plants. One form has long stamens and short styles - the other longer styles and short stamens. They are both dimorphic forms of Spiraea lobata, but well worthy of being kept distinct by cultivators, and for this the specific name in use, venusta, will be as good as any.