| Houstonia caerulea L. |
Accepted |
16 |
| Houstonia canadensis Willd. ex Roem. & Schult. |
Accepted |
9 |
| Houstonia longifolia Gaertn. |
Accepted |
6 |
| Houstonia purpurea L. |
Accepted |
10 |
| Houstonia purpurea var. calycosa A. Gray |
Accepted |
9 |
| Houstonia pusilla Schoepf |
Accepted |
8 |
| Houstonia serpyllifolia Michx. |
Accepted |
16 |
| Hedyotis acerosa A. Gray |
Synonym of Houstonia acerosa (A. Gray) Benth. & Hook. |
11 |
| Hedyotis polypremoides (A. Gray) Shinners |
Synonym of Houstonia acerosa var. polypremoides (A. Gray) Terrell |
11 |
| Hedyotis caerulea (L.) Hook. |
Synonym of Houstonia caerulea L. |
16 |
| Hedyotis caerulea var. faxonorum (Pease & A. H. Moore) Fosberg |
Synonym of Houstonia caerulea L. |
16 |
| Houstonia caerulea var. caerulea |
Synonym of Houstonia caerulea L. |
16 |
| Hedyotis canadensis (Willd.) Fosberg |
Synonym of Houstonia canadensis Willd. ex Roem. & Schult. |
9 |
| Hedyotis croftiae (Britton & Rusby) Shinners |
Synonym of Houstonia croftiae Britton & Rusby |
11 |
| Hedyotis humifusa Engelm. ex A. Gray |
Synonym of Houstonia humifusa (Engelm.) A. Gray |
11 |
| Hedyotis longifolia (Gaertn.) Hook. |
Synonym of Houstonia longifolia Gaertn. |
6 |
| Hedyotis longifolia var. tenuifolia (Nutt.) Torr. & A. Gray |
Synonym of Houstonia longifolia var. tenuifolia (Nutt.) A. Wood |
6 |
| Hedyotis nuttalliana Fosberg |
Synonym of Houstonia longifolia var. tenuifolia (Nutt.) A. Wood |
6 |
| Hedyotis australis W. H. Lewis & D. W. Moore |
Synonym of Houstonia micrantha (Shinners) Terrell |
16 |
| Hedyotis australis W. H. Lewis & D. W. Moore |
Synonym of Houstonia micrantha (Shinners) Terrell |
16 |
| Hedyotis longipes (S. Watson) W. H. Lewis |
Synonym of Houstonia palmeri A. Gray |
11 |
| Hedyotis greenmanii Fosberg ex Shinners |
Synonym of Houstonia parviflora Holz. ex Greenm. |
11 |
| Hedyotis procumbens (Walter) Fosberg |
Synonym of Houstonia procumbens (Walter) Standl. |
14 |
| Hedyotis nigricans var. rigidiuscula (A. Gray) Shinners |
Synonym of Houstonia purpurea L. |
10 |
| Hedyotis purpurea (L.) Torr. & A. Gray |
Synonym of Houstonia purpurea L. |
10 |
| Hedyotis umbellata Walter |
Synonym of Houstonia purpurea L. |
10 |
| Houstonia purpurea |
Synonym of Houstonia purpurea L. |
10 |
| Houstonia purpurea var. purpurea |
Synonym of Houstonia purpurea L. |
10 |
| Hedyotis purpurea var. calycosa (A. Gray) C. Mohr |
Synonym of Houstonia purpurea var. calycosa A. Gray |
9 |
| Hedyotis purpurea var. montana (Small) Fosberg |
Synonym of Houstonia purpurea var. montana (Small) Terrell |
6 |
| Hedyotis crassifolia Raf. |
Synonym of Houstonia pusilla Schoepf |
8 |
| Hedyotis crassifolia Raf. |
Synonym of Houstonia pusilla Schoepf |
8 |
| Hedyotis rosea Raf. |
Synonym of Houstonia rosea (Raf.) Terrell |
7 |
| Hedyotis rubra (Cav.) A. Gray |
Synonym of Houstonia rubra Cav. |
11 |
| Hedyotis michauxii Fosberg |
Synonym of Houstonia serpyllifolia Michx. |
16 |
| Hedyotis subviscosa (C. Wright) Shinners |
Synonym of Houstonia subviscosa (C. Wright) A. Gray |
11 |
| Hedyotis pygmaea Roem. & Schult. |
Synonym of Houstonia wrightii A. Gray |
11 |
| Hedyotis wrightii (A. Gray) Fosberg |
Synonym of Houstonia wrightii A. Gray |
11 |
| Houstonia gracilis Brandegee |
Synonym of Mexotis latifolia (M. Martens & Galeotti) Terrell & H. Rob. |
17 |
| Houstonia nigricans var. pulvinata (Small) Terrell |
Synonym of Stenaria nigricans (Lam.) Terrell |
10 |
| Houstonia nigricans var. floridana (Standl.) Terrell |
Synonym of Stenaria nigricans var. floridana (Standl.) Terrell |
9 |