All Species in Houstonia
- Azure Bluet (Houstonia caerulea)
- Canadian Summer Bluet (Houstonia canadensis)
- Correll's Bluet (Houstonia correllii)
- Croft's Bluet (Houstonia croftiae)
- Greenman's Bluet (Houstonia parviflora)
- Longleaf Summer Bluet (Houstonia longifolia)
- Matted Bluet (Houstonia humifusa)
- Needleleaf Bluet (Houstonia acerosa)
- New Mexico Starviolet (Houstonia prostrata)
- Nodding Bluet (Houstonia subviscosa)
- Ouachita Bluet (Houstonia ouachitana)
- Pygmy Bluet (Houstonia wrightii)
- Red Bluet (Houstonia rubra)
- Roundleaf Bluet (Houstonia procumbens)
- Southern Bluet (Houstonia micrantha)
- Thymeleaf Bluet (Houstonia serpyllifolia)
- Tiny Bluet (Houstonia pusilla)
- Venus' Pride (Houstonia purpurea)