Houstonia acerosa (A.Gray) Benth. & Hook.f. species accepted

Houstonia caerulea L. species accepted

Houstonia canadensis Willd. species accepted

Houstonia croftiae Britton & Rusby species accepted

Houstonia humifusa (Engelm. ex A.Gray) A.Gray species accepted

Houstonia longifolia Gaertn. species accepted

Houstonia macvaughii (Terrell) Govaerts ex Borhidi species accepted

Houstonia micrantha (Shinners) Terrell species accepted

Houstonia ouachitana (E.B.Sm.) Terrell species accepted

Houstonia palmeri A.Gray species accepted

Houstonia parviflora Holz. ex Greenm. species accepted

Houstonia procumbens (Walter ex J.F.Gmel.) Standl. species accepted

Houstonia prostrata Brandegee species accepted

Houstonia purpurea L. species accepted

Houstonia pusilla Schoepf species accepted

Houstonia rosea (Raf.) Terrell species accepted

Houstonia rubra Cav. species accepted

Houstonia serpyllifolia Michx. species accepted

Houstonia sharpii Terrell species accepted

Houstonia spellenbergii (G.L.Nesom & Vorobik) Terrell species accepted

Houstonia subviscosa (C.Wright ex A.Gray) A.Gray species accepted

Houstonia teretifolia Terrell species accepted

Houstonia correllii (W.H.Lewis) Terrell species accepted

Houstonia wrightii A.Gray species accepted

Houstonia chlorantha Bertol. species provisionally accepted