Taxonomy Browser

Concept:    details
Higher Taxa class: Equisetopsida C. Agardh
subclass: Magnoliidae Novák ex Takht.
superorder: Asteranae Takht.
order: Gentianales Juss. ex Bercht. & J. Presl
family: !Rubiaceae Juss.

  genus: Houstonia L.   Go to name

Lower Taxa section: Houstonia sect. Amphiotis (DC.) Terrell
subgeneric unranked: Houstonia [ unranked ] Angustifoliae Small
subgenus: Houstonia subgen. Chamisme Raf.
subgenus: Houstonia subgen. Edrisia Raf.
section: Houstonia sect. Ericotis (Terrell) Terrell
subgenus: Houstonia subgen. Ericotis Terrell
subgenus: Houstonia subgen. Houstonia
section: Houstonia sect. Mullerae Terrell
subgenus: Houstonia subgen. Stenaria Raf.
species: Houstonia acerosa (A. Gray) Benth. & Hook. f.
species: Houstonia angustifolia Michx.
species: *Houstonia angustifolia Pursh
species: Houstonia arenaria Rose
species: Houstonia asperuloides (Benth.) A. Gray
species: Houstonia australis I.M. Johnst.
species: Houstonia biloba Raf.
species: Houstonia bouvardioides (Seem.) Benth. & Hook. f.
species: Houstonia brandegeeana Rose
species: Houstonia brevipes Rose
species: Houstonia bryoides Willd. ex Roem. & Schult.
species: Houstonia butterwickiae Terrell
species: Houstonia caerulea L.
species: Houstonia calycosa (A. Gray) C. Mohr
species: Houstonia canadensis Willd. ex Roem. & Schult.
species: Houstonia cervantesii (Kunth) Terrell
species: Houstonia chlorantha Bertol.
species: Houstonia ciliata Raf.
species: Houstonia ciliolata Torr.
species: Houstonia coccinea Andrews
species: Houstonia correllii (W.H. Lewis) Terrell
species: Houstonia croftiae Britton & Rusby
species: Houstonia drymarioides Standl.
species: Houstonia fasciculata A. Gray
species: Houstonia faxonorum (Pease & A.H. Moore) Fernald
species: Houstonia filifolia (Chapm.) Small
species: Houstonia floridana Standl.
species: !Houstonia fruticosa Willd. ex Roem. & Schult.
species: *Houstonia fruticosa Raf. ex A. Gray
species: *Houstonia fruticosa Rose
species: Houstonia galeottii (M. Martens & Galeotti) ined.
species: Houstonia geniculata Raf.
species: Houstonia gracilenta I.M. Johnst.
species: Houstonia gracilis Brandegee
species: Houstonia grandiflora Raf.
species: Houstonia greenei (A. Gray) Terrell
species: Houstonia heterophylla Raf.
species: !Houstonia humifusa (A. Gray) A. Gray
species: **Houstonia humifusa (A. Gray) Hemsl.
species: Houstonia kingii Terrell
species: Houstonia lanceolata (Poir.) Britton
species: Houstonia latifolia Willd. ex Roem. & Schult.
species: Houstonia linnaei Michx.
species: Houstonia longiflora (Cav.) A. Gray
species: Houstonia longifolia Gaertn.
species: Houstonia longipes S. Watson
species: Houstonia macrosepala Nutt.
species: Houstonia macvaughii (Terrell) ined.
species: Houstonia micrantha (Shinners) Terrell
species: Houstonia microphylla Willd. ex Roem. & Schult.
species: Houstonia minima L.C. Beck
species: Houstonia minor (Michx.) Britton
species: Houstonia montana Small
species: Houstonia mucronata (Benth.) B.L. Rob.
species: Houstonia mullerae (Fosberg) Terrell
species: Houstonia nigricans (Lam.) Fernald
species: Houstonia nuttalliana Fosberg
species: Houstonia oblongifolia Raf.
species: Houstonia obtusifolia Raf.
species: Houstonia ochroleuca Raf.
species: Houstonia ouachitana (E.B. Sm.) Terrell
species: Houstonia palmeri A. Gray
species: Houstonia parviflora Holz. ex Greenm.
species: Houstonia parvula Brandegee
species: Houstonia patens Elliott
species: Houstonia peninsularis Brandegee
species: Houstonia polypremoides A. Gray
species: Houstonia procumbens (J.F. Gmel.) Standl.
species: Houstonia prostrata Brandegee
species: Houstonia pubescens Raf.
species: Houstonia pulvinata Small
species: Houstonia purpurea L.
species: !Houstonia pusilla Schöpf
species: *Houstonia pusilla J.F. Gmel.
species: Houstonia pygmaea C.H. Mull. & M.T. Mull.
species: Houstonia reticulata Raf.
species: Houstonia rigidiuscula (A. Gray) Wooton & Standl.
species: Houstonia rosea (Raf.) Terrell
species: Houstonia rotundifolia Michx.
species: Houstonia rubra Cav.
species: Houstonia rupestris Raf.
species: Houstonia rupicola Greenm.
species: Houstonia salina A. Heller
species: Houstonia saxicola Eastw.
species: Houstonia serpens Kunth
species: Houstonia serpyllacea (Schltdl.) C.L. Sm. ex Greenm.
species: Houstonia serpyllifolia Michx.
species: *Houstonia serpyllifolia Graham
species: Houstonia setiscaphia L.G. Carr
species: Houstonia sharpii Terrell
species: Houstonia spellenbergii (G.L. Nesom & Vorobik) Terrell
variety: Houstonia stenophylla var. parviflora A. Gray
species: Houstonia subviscosa (Wright ex A. Gray) A. Gray
species: Houstonia tenella Pursh
species: Houstonia tenuifolia Nutt.
species: Houstonia tenuis Small
species: Houstonia teretifolia Terrell
species: Houstonia terrellii (Lorence) ined.
species: Houstonia trichotoma (Schinz) Bär
species: Houstonia triflora (Kunth) A. Gray
species: **Houstonia umbellata Walp.
species: Houstonia umbratilis B.L. Rob.
species: Houstonia varians Michx.
species: Houstonia wrightii A. Gray
species: Houstonia xestosperma (B.L. Rob. & Greenm.) Terrell