Houstonia caerulea (azure bluet or Quaker ladies) is a perennial species in the Rubiaceae family. It is native to eastern Canada (Ontario to Newfoundland) and the eastern United States (Maine to Wisconsin, south to Florida and Louisiana, with scattered populations in Oklahoma).
Houstonia caerulea (azure bluet or Quaker ladies) is a perennial species in the Rubiaceae family. It is native to eastern Canada (Ontario to Newfoundland) and the eastern United States (Maine to Wisconsin, south to Florida and Louisiana, with scattered populations in Oklahoma).