Genus: HOUSTONIA  Family: RUBIACEAE Source: USDA, NRCS. 2009. The PLANTS Database (http://plants.usda.gov, 24 June 2009). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Genera of RUBIACEAE Select a genus and click on Ok 1) Aidia 2) Antirhea 3) Stenostomum 4) Laugeria 5) Asperula 6) Bikkia 7) Bobea 8) Bouvardia 9) Calycophyllum 10) Macrocnemum 11) Casasia 12) Genipa 13) Randia 14) Catesbaea 15) Cephaelis 16) Psychotria 17) Cephalanthus 18) Chiococca 19) Lonicera 20) Chione 21) Cinchona 22) Coccocypselum 23) Tontanea 24) Coffea 25) Coprosma 26) Gomozia 27) Nertera 28) Crucianella 29) Cruciata 30) Galium 31) Vaillantia 32) Crusea 33) Damnacanthus 34) Dentella 35) Diodia 36) Diodella 37) Hemidiodia 38) Spermacoce 39) Erithalis 40) Ernodea 41) Exostema 42) Faramea 43) Ixora 44) Bataprine 45) Rubia 46) Valantia 47) Relbunium 48) Gardenia 49) Geophila 50) Rondeletia 51) Gonzalagunia 52) Duggena 53) Gouldia 54) Guettarda 55) Matthiola 56) Hamelia 57) Hedyotis 58) Kadua 59) Houstonia 60) Oldenlandia 61) Hillia 62) Hydnophytum 63) Hydrophylax 64) Kelloggia 65) Lasianthus 66) Hoffmania 67) Hoffmannia 68) Luculia 69) Lucya 70) Clavenna 71) Machaonia 72) Mitchella 73) Mitracarpus 74) Morinda 75) Mussaenda 76) Neolamarckia 77) Anthocephalus 78) Neolaugeria 79) Terebraria 80) Neonauclea 81) Oldenlandiopsis 82) Paederia 83) Palicourea 84) Pentanisia 85) Pentas 86) Pentodon 87) Phialanthus 88) Pinckneya 89) Myrstiphyllum 90) Psydrax 91) Canthium 92) Putoria 93) Richardia 94) Sabicea 95) Sarcopygme 96) Schradera 97) Urceolaria 98) Scolosanthus 99) Scyphiphora 100) Serissa 101) Sherardia 102) Borreria 103) Stenaria 104) Chamisme 105) Gentiana 106) Strumpfia 107) Tarenna 108) Timonius 109) Uncaria 110) Vangueria

TAXON	DISTRIB.	IMAGES
Houstonia greenei (A. Gray) Terrell Views: 278.339 - Synonyms: = Hedyotis greenei (A. Gray) W.H. Lewis = Oldenlandia greenei A. Gray
Houstonia acerosa (A. Gray) A. Gray ex Benth. & Hook. f. Views: 202.032 Subshrub, Forb/herb - Perennial needleleaf bluet
Houstonia acerosa (A. Gray) A. Gray ex Benth. & Hook. f. var. acerosa Views: 248.278 Forb/herb, Subshrub - Perennial needleleaf bluet Synonyms: = Hedyotis acerosa A. Gray = Oldenlandia acerosa (A. Gray) A. Gray
Houstonia acerosa (A. Gray) A. Gray ex Benth. & Hook. f. var. polypremoides (A. Gray) Terrell Views: 215.241 Forb/herb, Subshrub - Perennial Synonyms: = Hedyotis acerosa A. Gray var. bigelovii (Greenm.) W.H. Lewis = Hedyotis acerosa A. Gray var. polypremoides (A. Gray) W.H. Lewis = Hedyotis polypremoides (A. Gray) Shinners = Houstonia acerosa (A. Gray) A. Gray ex Benth. & Hook. f. ssp. polypremoides (A. Gray) Terrell = Houstonia polypremoides A. Gray = Houstonia polypremoides A. Gray var. bigelovii Greenm.
Houstonia caerulea L. Views: 449.343 Forb/herb - Perennial azure bluet Synonyms: = Hedyotis caerulea (L.) Hook. = Houstonia caerulea L. var. faxonorum Pease & A.H. Moore
Houstonia canadensis Willd. ex Roem. & Schult. Views: 262.543 Forb/herb - Perennial Canadian summer bluet Synonyms: = Hedyotis canadensis (Willd. ex Roem. & Schult.) Fosberg = Hedyotis longifolia (Gaertn.) Hook. var. ciliolata (Torr.) Mohlenbr. = Hedyotis purpurea (L.) Torr. & A. Gray var. ciliolata (Torr.) Fosberg = Hedyotis purpurea (L.) Torr. & A. Gray var. setiscaphia (L.G. Carr) Fosberg = Houstonia canadensis Willd. ex Roem. & Schult. var. setiscaphia (L.G. Carr) C.F. Reed = Houstonia ciliolata Torr. = Houstonia setiscaphia L.G. Carr
Houstonia correllii (W.H. Lewis) Terrell Views: 234.944 Forb/herb - Annual Correll's bluet Synonyms: = Hedyotis correllii W.H. Lewis
Houstonia croftiae Britton & Rusby Views: 231.969 Forb/herb - Annual Croft's bluet Synonyms: = Hedyotis croftiae (Britton & Rusby) Shinners
Houstonia humifusa (A. Gray) A. Gray Views: 212.908 Forb/herb - Annual matted bluet Synonyms: = Hedyotis humifusa A. Gray = Oldenlandia humifusa (A. Gray) A. Gray
Houstonia longifolia Gaertn. Views: 328.54 Forb/herb - Perennial longleaf summer bluet Synonyms: = Hedyotis longifolia (Gaertn.) Hook. = Hedyotis longifolia (Gaertn.) Hook. var. tenuifolia (Nutt.) Torr. & A. Gray = Hedyotis nuttalliana Fosberg = Hedyotis purpurea (L.) Torr. & A. Gray var. longifolia (Gaertn.) Fosberg = Hedyotis purpurea (L.) Torr. & A. Gray var. tenuifolia (Nutt.) Fosberg = Houstonia longifolia Gaertn. var. compacta Terrell = Houstonia longifolia Gaertn. var. glabra Terrell = Houstonia longifolia Gaertn. var. tenuifolia (Nutt.) Alph. Wood = Houstonia purpurea L. var. tenuifolia (Nutt.) A. Gray = Houstonia tenuifolia Nutt. = Oldenlandia purpurea (L.) A. Gray var. tenuifolia (Nutt.) A. Gray ex Chapm.
Houstonia micrantha (Shinners) Terrell Views: 254.527 Forb/herb - Annual southern bluet Synonyms: = Hedyotis australis W.H. Lewis & D.M. Moore = Hedyotis crassifolia Raf. var. micrantha Shinners
Houstonia ouachitana (E.B. Sm.) Terrell Views: 183.793 Forb/herb - Perennial Ouachita bluet Synonyms: = Hedyotis ouachitana E.B. Sm.
Houstonia parviflora Holz. ex Greenm. Views: 207.516 Forb/herb - Annual Greenman's bluet Synonyms: = Hedyotis greenmanii Fosberg
Houstonia procumbens (Walter ex J.F. Gmel.) Standl. Views: 180.669 Forb/herb - Perennial roundleaf bluet Synonyms: = Hedyotis procumbens (Walter ex J.F. Gmel.) Fosberg = Hedyotis procumbens (Walter ex J.F. Gmel.) Fosberg var. hirsuta W.H. Lewis = Houstonia rotundifolia Michx.
Houstonia purpurea L. Views: 280.37 Forb/herb - Perennial Venus' pride
Houstonia purpurea L. var. calycosa A. Gray Views: 333.297 Forb/herb - Perennial Venus' pride Synonyms: = Hedyotis lanceolata Poir. = Hedyotis purpurea (L.) Torr. & A. Gray var. calycosa (A. Gray) Fosberg = Houstonia calycosa (A. Gray) C. Mohr = Houstonia lanceolata (Poir.) Britton
Houstonia purpurea L. var. montana (Small) Terrell Views: 276.209 Forb/herb - Perennial Venus' pride Synonyms: = Hedyotis purpurea (L.) Torr. & A. Gray var. montana (Small) Fosberg = Houstonia montana Small
Houstonia purpurea L. var. purpurea Views: 210.312 Forb/herb - Perennial Venus' pride Synonyms: = Hedyotis purpurea (L.) Torr. & A. Gray = Houstonia purpurea L. var. pubescens Britton
Houstonia pusilla Schoepf Views: 421.311 Forb/herb - Annual tiny bluet Synonyms: = Hedyotis caerulea (L.) Hook. var. minima (Beck) Fosberg = Hedyotis caerulea (L.) Hook. var. minor (Michx.) Torr. & A. Gray = Hedyotis crassifolia Raf. = Hedyotis minima (Beck) Torr. & A. Gray = Houstonia minima Beck = Houstonia patens Elliot
Houstonia rosea (Raf.) Terrell Views: 202.246 Forb/herb - Annual rose bluet Synonyms: = Hedyotis rosea Raf. = Hedyotis tayloriae Fosberg = Houstonia pygmaea C.H. Mull. & M.T. Mull.
Houstonia rubra Cav. Views: 250.543 Forb/herb - Perennial red bluet Synonyms: = Hedyotis rubra (Cav.) A. Gray = Oldenlandia rubra (Cav.) A. Gray
Houstonia serpyllifolia Michx. Views: 326.69 Forb/herb - Perennial thymeleaf bluet Synonyms: = Hedyotis michauxii Fosberg
Houstonia subviscosa (C. Wright ex A. Gray) A. Gray Views: 217.183 Forb/herb - Annual nodding bluet Synonyms: = Hedyotis subviscosa (C. Wright ex A. Gray) Shinners = Oldenlandia subviscosa C. Wright ex A. Gray
Houstonia wrightii A. Gray Views: 230.647 Forb/herb - Perennial pygmy bluet Synonyms: = Hedyotis cervantesii Kunth = Hedyotis pygmaea Roem. & Schult. = Hedyotis wrightii (A. Gray) Fosberg

More genera: Houttuynia Hovenia Howeia Howellia Howelliella Hoya Hudsonia Hulsea Hulteniella Humulus Hunnemannia Hunzikeria