The name Lac qui Parle is given to a new county. The name, French for "lake that talks," likely refers to echoes among the bluffs surrounding the lake of the same name and comes from the Dakota place name (Mde Iaúdaŋ, Small Lake That Speaks) that predates it. Yellow Medicine County is also formed, named for the root of the moonseed, called pejuta zi (yellow medicine) by Dakota people and used as a medicinal herb.