Microsteris is a monotypic genus of flowering plants in the phlox family containing the single species Microsteris gracilis, known by the common name slender phlox. The segregation of this species into a genus of its own is controversial, and many botanists continue to include the plant in genus Phlox. Genetic analysis is continuing. The plant is native to western North America from northwestern Canada to the American Midwest to Mexico, as well as parts of South...
