| Houstonia acerosa (A.Gray) Benth. & Hook.f. |
Accepted |
 |
WCSP |
|
| Houstonia acerosa var. acerosa |
Synonym |
 |
WCSP |
|
| Houstonia acerosa var. polypremoides (A.Gray) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia acerosa subsp. polypremoides (A.Gray) Terrell |
Synonym |
 |
WCSP |
|
| Houstonia acerosa var. tamaulipana (B.L.Turner) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia angustifolia Pursh [Illegitimate] |
Synonym |
 |
WCSP |
|
| Houstonia angustifolia Michx. |
Synonym |
 |
WCSP |
|
| Houstonia angustifolia var. filifolia (Chapm.) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia angustifolia var. rigidiuscula A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia angustifolia var. scabra S.Watson |
Synonym |
 |
WCSP |
|
| Houstonia arenaria Rose |
Synonym |
 |
WCSP |
|
| Houstonia asperuloides (Benth.) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia asperuloides f. brandegeeana (Rose) W.H.Lewis |
Synonym |
 |
WCSP |
|
| Houstonia asperuloides var. brandegeeana (Rose) Wiggins |
Synonym |
 |
WCSP |
|
| Houstonia australis I.M.Johnst. |
Synonym |
 |
WCSP |
|
| Houstonia biloba Raf. [Unplaced] |
Unresolved |
 |
WCSP |
|
| Houstonia bouvardioides (Seem.) Benth. & Hook.f. |
Synonym |
 |
WCSP |
|
| Houstonia brandegeeana Rose |
Synonym |
 |
WCSP |
|
| Houstonia brevipes Rose |
Synonym |
 |
WCSP |
|
| Houstonia bryoides Roem. & Schult. |
Synonym |
 |
WCSP |
|
| Houstonia butterwickiae Terrell |
Synonym |
 |
WCSP |
|
| Houstonia caerulea L. |
Accepted |
 |
WCSP |
|
| Houstonia caerulea f. albiflora Millsp. |
Synonym |
 |
WCSP |
|
| Houstonia caerulea f. caerulea |
Synonym |
 |
TRO |
|
| Houstonia caerulea var. caerulea |
Synonym |
 |
TRO |
|
| Houstonia caerulea var. elatior (Michx.) Pursh |
Synonym |
 |
WCSP |
|
| Houstonia caerulea var. faxonorum Pease & A.H.Moore |
Synonym |
 |
WCSP |
|
| Houstonia caerulea var. minor (Michx.) Pursh |
Synonym |
 |
WCSP |
|
| Houstonia caerulea var. piersii Barbour |
Synonym |
 |
WCSP |
|
| Houstonia caerulea var. toxonorum Stevens |
Synonym |
 |
WCSP |
|
| Houstonia calycosa (A.Gray) Mohr |
Synonym |
 |
WCSP |
|
| Houstonia canadensis Willd. ex Roem. & Schult. |
Accepted |
 |
WCSP |
|
| Houstonia canadensis var. setiscaphia (L.G.Carr) C.F.Reed |
Synonym |
 |
WCSP |
|
| Houstonia cervantesii Terrell |
Unresolved |
 |
TRO |
|
| Houstonia chlorantha Bertol. [Unplaced] |
Unresolved |
 |
WCSP |
|
| Houstonia ciliolata Torr. |
Synonym |
 |
WCSP |
|
| Houstonia coccinea Andrews |
Synonym |
 |
WCSP |
|
| Houstonia correllii (W.H.Lewis) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia croftiae Britton & Rusby |
Accepted |
 |
WCSP |
|
| Houstonia drymarioides Standl. |
Synonym |
 |
WCSP |
|
| Houstonia fasciculata A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia faxonorum (Pease & A.H.Moore) Fernald |
Synonym |
 |
WCSP |
|
| Houstonia filifolia (Chapm.) Small |
Synonym |
 |
WCSP |
|
| Houstonia floridana Standl. |
Synonym |
 |
WCSP |
|
| Houstonia fruticosa Raf. ex A.Gray [Illegitimate] |
Synonym |
 |
WCSP |
|
| Houstonia fruticosa Rose [Illegitimate] |
Synonym |
 |
WCSP |
|
| Houstonia fruticosa Willd. ex Roem. & Schult. |
Synonym |
 |
WCSP |
|
| Houstonia geniculata Raf. |
Synonym |
 |
WCSP |
|
| Houstonia × gracilenta I.M.Johnst. |
Synonym |
 |
WCSP |
|
| Houstonia gracilis Brandegee |
Synonym |
 |
WCSP |
|
| Houstonia grandiflora Raf. |
Synonym |
 |
WCSP |
|
| Houstonia greenei (A.Gray) Terrell |
Synonym |
 |
WCSP |
|
| Houstonia heterophylla Raf. |
Synonym |
 |
WCSP |
|
| Houstonia humifusa Hemsl. [Illegitimate] |
Synonym |
 |
WCSP |
|
| Houstonia humifusa (Engelm. ex A.Gray) A.Gray |
Accepted |
 |
WCSP |
|
| Houstonia kingii Terrell |
Synonym |
 |
WCSP |
|
| Houstonia lanceolata (Poir.) Britton |
Synonym |
 |
WCSP |
|
| Houstonia lanceolata f. albiflora Standl. |
Synonym |
 |
WCSP |
|
| Houstonia latifolia Willd. ex Roem. & Schult. |
Synonym |
 |
WCSP |
|
| Houstonia linnaei Michx. |
Synonym |
 |
WCSP |
|
| Houstonia linnaei var. elatior Michx. |
Synonym |
 |
WCSP |
|
| Houstonia linnaei var. minor Michx. |
Synonym |
 |
WCSP |
|
| Houstonia longiflora (Cav.) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia longifolia Gaertn. |
Accepted |
 |
WCSP |
|
| Houstonia longifolia var. ciliolata (Torr.) Alph.Wood |
Synonym |
 |
WCSP |
|
| Houstonia longifolia var. compacta Terrell |
Synonym |
 |
WCSP |
|
| Houstonia longifolia var. glabra Terrell |
Synonym |
 |
WCSP |
|
| Houstonia longifolia var. longifolia |
Synonym |
 |
WCSP |
|
| Houstonia longifolia var. musci B.Boivin |
Synonym |
 |
WCSP |
|
| Houstonia longifolia var. soperi B.Boivin |
Synonym |
 |
WCSP |
|
| Houstonia longifolia var. tenuifolia (Nutt.) Alph.Wood |
Accepted |
 |
WCSP |
|
| Houstonia longipes S.Watson |
Synonym |
 |
WCSP |
|
| Houstonia macrosepala Nutt. |
Synonym |
 |
WCSP |
|
| Houstonia micrantha (Shinners) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia microphylla Willd. ex Roem. & Schult. |
Unresolved |
 |
WCSP |
|
| Houstonia minima Beck |
Synonym |
 |
WCSP |
|
| Houstonia minor Britton |
Synonym |
 |
WCSP |
|
| Houstonia minor var. pusilla (A.Gray) Small |
Synonym |
 |
WCSP |
|
| Houstonia montana Small |
Synonym |
 |
WCSP |
|
| Houstonia mucronata (Benth.) B.L.Rob. |
Synonym |
 |
WCSP |
|
| Houstonia mullerae (Fosberg) Terrell |
Synonym |
 |
WCSP |
|
| Houstonia nigricans (Lam.) Fernald |
Synonym |
 |
WCSP |
|
| Houstonia nigricans var. angulata (Fosberg ex Shinners) W.H.Lewis |
Synonym |
 |
WCSP |
|
| Houstonia nigricans var. floridana (Standl.) Terrell |
Synonym |
 |
WCSP |
|
| Houstonia nigricans var. nigricans |
Synonym |
 |
WCSP |
|
| Houstonia nigricans var. pulvinata (Small) Terrell |
Synonym |
 |
WCSP |
|
| Houstonia nuttalliana Fosberg |
Unresolved |
 |
TRO |
|
| Houstonia oblongifolia Raf. |
Synonym |
 |
WCSP |
|
| Houstonia obtusifolia Raf. |
Synonym |
 |
WCSP |
|
| Houstonia ochroleuca Raf. |
Unresolved |
 |
TRO |
|
| Houstonia ouachitana (E.B.Sm.) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia palmeri A.Gray |
Accepted |
 |
WCSP |
|
| Houstonia palmeri var. muzquizana (B.L.Turner) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia palmeri var. palmeri |
Synonym |
 |
WCSP |
|
| Houstonia parviflora Holz. ex Greenm. |
Accepted |
 |
WCSP |
|
| Houstonia parvula Brandegee |
Synonym |
 |
WCSP |
|
| Houstonia patens Elliott |
Synonym |
 |
WCSP |
|
| Houstonia patens var. pusilla A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia peninsularis Brandegee |
Synonym |
 |
WCSP |
|
| Houstonia polypremoides A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia polypremoides var. bigelovii Greenm. |
Synonym |
 |
WCSP |
|
| Houstonia procumbens (Walter ex J.F.Gmel.) Standl. |
Accepted |
 |
WCSP |
|
| Houstonia procumbens var. hirsuta (W.H.Lewis) D.B.Ward |
Synonym |
 |
WCSP |
|
| Houstonia prostrata Brandegee |
Accepted |
 |
WCSP |
|
| Houstonia prostrata var. parvula (Brandegee) Wiggins |
Synonym |
 |
WCSP |
|
| Houstonia prostrata var. prostrata |
Synonym |
 |
TRO |
|
| Houstonia pubescens Raf. |
Synonym |
 |
WCSP |
|
| Houstonia pulvinata Small |
Synonym |
 |
WCSP |
|
| Houstonia purpurea L. |
Accepted |
 |
WCSP |
|
| Houstonia purpurea var. calycosa A.Gray |
Accepted |
 |
WCSP |
|
| Houstonia purpurea var. ciliolata (Torr.) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia purpurea var. longifolia (Gaertn.) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia purpurea var. montana (Small) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia purpurea var. pubescens Britton |
Synonym |
 |
WCSP |
|
| Houstonia purpurea f. pubescens (Britton) Fernald |
Synonym |
 |
WCSP |
|
| Houstonia purpurea var. purpurea |
Synonym |
 |
WCSP |
|
| Houstonia purpurea f. purpurea |
Synonym |
 |
TRO |
|
| Houstonia purpurea var. tenuifolia (Nutt.) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia pusilla Schoepf |
Accepted |
 |
WCSP |
|
| Houstonia pusilla J.F.Gmel. [Illegitimate] |
Synonym |
 |
WCSP |
|
| Houstonia pusilla f. albiflora Standl. |
Synonym |
 |
WCSP |
|
| Houstonia pusilla f. rosea Steyerm. |
Synonym |
 |
WCSP |
|
| Houstonia pygmaea C.H.Müll. & M.T.Mull. |
Synonym |
 |
WCSP |
|
| Houstonia reticulata Raf. [Unplaced] |
Unresolved |
 |
WCSP |
|
| Houstonia rigidiuscula (A.Gray) Wooton & Standl. |
Synonym |
 |
WCSP |
|
| Houstonia rosea (Raf.) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia rotundifolia Michx. |
Synonym |
 |
WCSP |
|
| Houstonia rubra Cav. |
Accepted |
 |
WCSP |
|
| Houstonia rupestris Raf. |
Synonym |
 |
WCSP |
|
| Houstonia rupicola Greenm. |
Synonym |
 |
WCSP |
|
| Houstonia salina A.Heller |
Synonym |
 |
WCSP |
|
| Houstonia saxicola Eastw. |
Synonym |
 |
WCSP |
|
| Houstonia serpens Kunth |
Synonym |
 |
WCSP |
|
| Houstonia serpyllacea (Schltdl.) C.L.Sm. ex Greenm. |
Synonym |
 |
WCSP |
|
| Houstonia serpyllifolia Michx. |
Accepted |
 |
WCSP |
|
| Houstonia serpyllifolia Graham [Illegitimate] |
Synonym |
 |
WCSP |
|
| Houstonia serpyllifolia f. alba Alexander |
Synonym |
 |
WCSP |
|
| Houstonia setiscaphia L.G.Carr |
Synonym |
 |
WCSP |
|
| Houstonia sharpii Terrell |
Accepted |
 |
WCSP |
|
| Houstonia spellenbergii (G.L.Nesom & Vorobik) Terrell |
Accepted |
 |
WCSP |
|
| Houstonia subviscosa (C.Wright ex A.Gray) A.Gray |
Accepted |
 |
WCSP |
|
| Houstonia tenella Pursh |
Synonym |
 |
WCSP |
|
| Houstonia tenuifolia Nutt. |
Synonym |
 |
WCSP |
|
| Houstonia tenuifolia f. leucantha Standl. |
Synonym |
 |
WCSP |
|
| Houstonia tenuis Small |
Synonym |
 |
WCSP |
|
| Houstonia teretifolia Terrell |
Accepted |
 |
WCSP |
|
| Houstonia terrellii (Lorence) Terrell & H.Rob. |
Synonym |
 |
WCSP |
|
| Houstonia trichotoma (Schinz) Bär |
Synonym |
 |
WCSP |
|
| Houstonia triflora (Kunth) A.Gray |
Synonym |
 |
WCSP |
|
| Houstonia umbellata Walp. [Invalid] |
Synonym |
 |
WCSP |
|
| Houstonia umbratilis B.L.Rob. |
Synonym |
 |
WCSP |
|
| Houstonia varians Michx. |
Synonym |
 |
WCSP |
|
| Houstonia wrightii A.Gray |
Accepted |
 |
WCSP |
|
| Houstonia xestosperma (B.L.Rob. & Greenm.) Terrell |
Synonym |
 |
WCSP |
|