tiny bluet
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Gentianales
- family: Rubiaceae
- genus: Houstonia
- species: Houstonia pusilla
Cullman- Dauphin Island
- Mobile
- Tuscaloosa
- Tuscumbia
Alabama- Emporia
Kansas- Aberdeen
- Federalsburg
Maryland- Fairland
Oklahoma
United States