Ruellia Plum. ex L., 1753 è un genere di piante angiosperme della famiglia delle Acantacee.
Il genere fu intitolato da Charles Plumier (1646-1704) a Jean Ruel (o de la Ruel, nome latinizzato in Ioannes Ruellius; 1474-1537), autore di una traduzione in latino del Περὶ ὕλης ἰατρικῆς (De materia medica) di Dioscoride Pedanio (I secolo d.C.).
Tassonomia Il genere comprende le seguenti specie:
Ruellia acutangula Nees Ruellia adenocalyx Lindau Ruellia adenostachya Lindau Ruellia affinis (Schrad.) T.Anderson Ruellia albopurpurea Benoist Ruellia alboviolacea Lindau Ruellia altoparadisiensis U.G.Fern., Kameyama & E.A.Tripp Ruellia amabilis S. Moore Ruellia amapensis Wassh. Ruellia amarilla E.A.Tripp & Luján Ruellia amoena Sessé & Moc. Ruellia amplexicaulis (Nees) Lindau Ruellia anamariae A.S.Reis, A.Gil & Kameyama Ruellia anaticollis Benoist Ruellia angolensis I.Darbysh. & E.A.Tripp Ruellia angustiflora (Nees) Lindau ex Rambo Ruellia angustifolia Sw. Ruellia angustior (Nees) Lindau Ruellia ansericollis Benoist Ruellia anthracina Leonard Ruellia antiquorum Wassh. & J.R.I. Wood Ruellia aquatica Leonard Ruellia asperula (Mart. & Nees) Lindau Ruellia aurantiaca Leonard Ruellia bahiensis (Nees) Morong Ruellia baikiei (Hook.) Benth. & Hook.f. ex Salomon Ruellia baurii C.B. Clarke Ruellia beckii Wassh. & J.R.I. Wood Ruellia beddomei C.B.Clarke Ruellia bella Craib Ruellia benedictina Chiov. Ruellia beniana J.R.I.Wood Ruellia beyrichiana Lindau Ruellia bignoniiflora S.Moore Ruellia biolleyi Lindau Ruellia blanchetiana Lindau Ruellia blechioides Sw. Ruellia blechum L. Ruellia blumei Steud. Ruellia bolivarensis Wassh. Ruellia boliviana Govaerts Ruellia boranica Ensermu Ruellia borneensis (S.Moore) E.A.Tripp & I.Darbysh. Ruellia bourgaei Hemsl. Ruellia brachysiphon (Nees) Hiern Ruellia bracteata R.Br. Ruellia brandbergensis Kers Ruellia breedlovei T.F. Daniel Ruellia brevifolia (Pohl) C.Ezcurra Ruellia bulbifera Lindau Ruellia burttii Vollesen Ruellia californica (Rose) I.M. Johnst. Ruellia calimensis Wassh. Ruellia capotyra Braz & I.H.F.Azevedo Ruellia capuronii Benoist Ruellia caracasana (Klotzsch & H.Karst. ex Nees) V.M.Badillo Ruellia carmenaemiliae Llamozas Ruellia carnea Balf. f. Ruellia caroliniensis (J.F. Gmel.) Steud. Ruellia cataractae U.G.Fern., Kameyama & E.A.Tripp Ruellia caucensis Leonard Ruellia cearensis Lindau Ruellia ceciliae U.G.Fern. & Kameyama Ruellia cedilloi Ramamoorthy Ruellia chamaedrys (Nees) Angely Ruellia chapadensis U.G.Fern., Kameyama & E.A.Tripp Ruellia chariessa Leonard Ruellia chartacea (T. Anderson) Wassh. Ruellia ciconiicollis Benoist Ruellia ciliata Hornem. Ruellia ciliatiflora Hook. Ruellia coccinea (L.) Vahl Ruellia colombiana Leonard Ruellia colonensis Wassh. Ruellia comonduensis T.F. Daniel Ruellia congoensis Benoist Ruellia consocialis Lindau Ruellia conzattii Standl. Ruellia cordata Thunb. Ruellia corynotheca F.Muell. ex Benth. Ruellia corzoi Tharp & F.A. Barkley Ruellia costaricensis (Oerst.) E.A.Tripp & McDade Ruellia costata Lindau Ruellia cuatrecasasii Wassh. Ruellia currorii T.Anderson Ruellia curupira E.C.O.Chagas & Costa-Lima Ruellia curviflora Nees & Mart. Ruellia cuyabensis Wassh. Ruellia cyanea (Nees) T. Anderson Ruellia decaryi Benoist Ruellia decipiens Nees Ruellia delascioi Wassh. Ruellia densa Hieron. Ruellia densiflora Hemsl. Ruellia dequairei Benoist Ruellia detonsa Benoist Ruellia devosiana Jacob-Makoy ex É.Morren Ruellia dielsii Mildbr. Ruellia dioscoridis Napper Ruellia discifolia Oliv. Ruellia discolor Lecchi ex Colla Ruellia dissidens Benoist Ruellia dissimilis J.B.Imlay Ruellia dissitifolia (Nees) Lindau Ruellia dissoluta Lindau Ruellia dolichosiphon Wassh. & J.R.I. Wood Ruellia domatiata I.Darbysh. & E.A.Tripp Ruellia domingensis (Nees) Lindau Ruellia donnell-smithii Leonard Ruellia drummondiana (Nees) A. Gray Ruellia drushelii Tharp & F.A. Barkley Ruellia edwardsae Tharp & F.A.Barkley Ruellia elegans Poir. Ruellia epallocaulos Leonard ex C. Ezcurra & Wassh. Ruellia eriocalyx Glaz. ex T.F.Daniel, E.A.Tripp & C.Ezcurra Ruellia erythropus (Nees) Lindau Ruellia eumorphantha Lindau Ruellia eurycodon Lindau Ruellia exilis McDade & E. Tripp Ruellia exostemma Lindau Ruellia exserta Wassh. & J.R.I. Wood Ruellia fiherenensis Benoist Ruellia filicalyx Lindau Ruellia fiorii Chiov. Ruellia floribunda Hook. Ruellia foetida Willd. Ruellia foliosepala T.F. Daniel Ruellia forsskaolii Thulin Ruellia fruticosa Sessé & Moc. ex DC. Ruellia fulgens (Bremek.) E. Tripp Ruellia fulgida Andrews Ruellia fulozinha E.C.O.Chagas & Costa-Lima Ruellia furcata (Nees) Lindau Ruellia galactophylla Chiov. Ruellia galeottii Leonard Ruellia geayi (Benoist) E.A.Tripp Ruellia geminiflora Kunth Ruellia gilva Wassh. Ruellia glandulifolia U.G.Fern., Kameyama & E.A.Tripp Ruellia glischrocalyx Lindau Ruellia golfodulcensis Durkee Ruellia gorgonensis Leonard Ruellia gracilis Rusby Ruellia grantii Leonard Ruellia grisea Leonard Ruellia gruicollis Benoist Ruellia guerrerensis T.F.Daniel Ruellia haematantha Lindau Ruellia haenkeana (Nees) Wassh. Ruellia hapalotricha Lindau Ruellia harveyana Stapf Ruellia hatschbachii U.G.Fern. & Kameyama Ruellia haughtii (Leonard) E.A.Tripp Ruellia helianthema (Nees) Profice Ruellia herbstii (Hook.) Hiern Ruellia heterosepala Benoist Ruellia heterotricha Deflers Ruellia hirsutissima (Nees) E.A.Tripp Ruellia hirsutoglandulosa (Oerst.) Hemsl. Ruellia holm-nielsenii Wassh. Ruellia hookeriana (Nees) Hemsl. Ruellia humboldtiana (Nees) Lindau Ruellia humilis Nutt. Ruellia hygrophila Mart. Ruellia hygrophiloides (Nees) Hemsl. Ruellia hypericoides (Nees) Lindau Ruellia incomta (Nees) Lindau Ruellia indecora Benoist Ruellia inflata Rich. Ruellia insignis Balf.f. Ruellia insurrecta E.C.O.Chagas & Costa-Lima Ruellia intermedia Leonard Ruellia inundata Kunth Ruellia ischnopoda Leonard Ruellia jaliscana Standl. Ruellia japurensis Mart. Ruellia jeddahica Hemaid Ruellia jiboia E.C.O.Chagas & Costa-Lima Ruellia jimulcensis Villarreal Ruellia jussieuoides Schltdl. & Cham. Ruellia kalungae G.V.R.Mendonça & M.J.Silva Ruellia kerrii Craib Ruellia kleinii C.Ezcurra & Wassh. Ruellia kuriensis Vierh. Ruellia lactea Cav. Ruellia lanatoglandulosa (Nees) Lindau Ruellia lasiostachya Leonard Ruellia laslobasensis E.A.Tripp Ruellia latibracteata D.N.Gibson Ruellia latisepala Benoist Ruellia laxa (Nees) Lindau Ruellia leonardiana Hammel Ruellia lepidota Urb. Ruellia leptosepala Benoist Ruellia leucantha Brandegee Ruellia leucobracteatus Durkee Ruellia liesneri Wassh. Ruellia linearibracteolata Lindau Ruellia lindaviana Taub. Ruellia linifolia Benoist Ruellia lithophila Lindau Ruellia longepetiolata (Oerst.) Hemsl. Ruellia longifilamentosa Lindau Ruellia longifolia (Stocks) T. Anderson Ruellia longipedunculata Lindau Ruellia lucindae U.G.Fern., Kameyama & E.A.Tripp Ruellia lutea (Leonard) E.A.Tripp & Luján Ruellia luzona Nees Ruellia luzoniensis Merr. Ruellia macarenensis Leonard Ruellia macrantha Lindau Ruellia macrophylla Vahl Ruellia macrosiphon Kurz Ruellia macrosolen Lillo ex C.Ezcurra Ruellia magniflora C.Ezcurra Ruellia makoyana Closon Ruellia malaca Leonard Ruellia malacophylla C.B. Clarke Ruellia malasica (C.B.Clarke) J.B.Imlay Ruellia matagalpae Lindau Ruellia matudae Leonard Ruellia maya T.F. Daniel Ruellia mcvaughii T.F. Daniel Ruellia megasphaera Lindau Ruellia mellosilvae U.G.Fern., Kameyama & E.A.Tripp Ruellia menthoides (Nees) Hiern Ruellia metziae Tharp Ruellia microcalyx (Nees) Lindau Ruellia mira McDade & E. Tripp Ruellia misera Benoist Ruellia mollis (Nees) Lindau Ruellia monanthos (Nees) Bojer ex T. Anderson Ruellia morongii Britton Ruellia muelleri Tharp & F.A.Barkley Ruellia multifolia (Nees) Lindau Ruellia napoensis Wassh. Ruellia neoneesiana Wassh. Ruellia neowedia (Schrad.) Lindau Ruellia nitens Lindau Ruellia nitida (Nees) Wassh. & J.R.I. Wood Ruellia nobilis (S. Moore) Lindau Ruellia noctiflora (Nees) A. Gray Ruellia nocturna Hedrén Ruellia norvegigratiosa McDade & E. Tripp Ruellia novogaliciana T.F. Daniel Ruellia nudiflora (Engelm. & A. Gray) Urb. Ruellia nummularia Benoist Ruellia oaxacana Leonard Ruellia obliqua Pers. Ruellia obtusa Nees Ruellia ochroleuca Mart. ex Nees Ruellia odorata E. Tripp & McDade Ruellia ovalifolia (Oerst.) Hemsl. Ruellia palustris Durkee Ruellia panamensis (Lindau) E.A.Tripp Ruellia paniculata L. Ruellia panucana Lindau Ruellia parryi A. Gray Ruellia parva Lindau Ruellia parvifolia Urb. Ruellia patula Jacq. Ruellia pauciovulata Benoist Ruellia paulayana Vierh. Ruellia pedunculata Torr. ex A. Gray Ruellia pedunculosa (Nees) Lindau Ruellia pereducta Standl. Ruellia perrieri Benoist Ruellia petiolaris (Nees) T.F. Daniel Ruellia philippinensis Elmer Ruellia phyllocalyx Lindau Ruellia pilosa (Nees) Pav. ex Nees Ruellia pinetorum Fernald Ruellia pinguicula U.G.Fern., Kameyama & E.A.Tripp Ruellia pittieri Lindau Ruellia placoidea Rendle Ruellia pohlii (Nees) E.A.Tripp & T.F.Daniel Ruellia poissonii Benoist Ruellia potamophila Leonard Ruellia praeclara Standl. Ruellia praetermissa Schweinf. ex Lindau Ruellia primulacea F.Muell. ex Benth. Ruellia primuloides Heine Ruellia pringlei Fernald Ruellia prostrata Poir. Ruellia proxima Lindau Ruellia pseudopatula Ensermu Ruellia pterocaulon Leonard Ruellia puberula (Leonard) Tharp & F.A. Barkley Ruellia pulcherrima T.Anderson ex Hemsl. Ruellia pulverulenta Leonard Ruellia pumila (Nees) Pav. ex B.D.Jacks. Ruellia purshiana Fernald Ruellia putumayensis Leonard Ruellia pygmaea Donn. Sm. Ruellia quartziticola Callm., E.A.Tripp & Phillipson Ruellia quipungoensis I.Darbysh. & E.A.Tripp Ruellia rasa Hieron. Ruellia rauhii Wassh. Ruellia reitzii Wassh. & L.B.Sm. Ruellia repens L. Ruellia resupinata E.A.Tripp & T.F.Daniel Ruellia rheophytica J.R.I.Wood & Hoyos-Gómez Ruellia richardsiae Vollesen Ruellia riedeliana (Nees) Profice Ruellia rosmarinus (Nees) U.G.Fern. & Kameyama Ruellia rubiginosa (Nees) Lindau Ruellia rubra Aubl. Ruellia rufipila Rizzini Ruellia ruiziana (Nees) Lindau Ruellia rusbyi Leonard Ruellia saccata Schmidt-Leb. & E. Tripp Ruellia saccifera Benoist Ruellia saeri Llamozas Ruellia salmeronensis Llamozas Ruellia salviifolius (Nees) Profice Ruellia sanguinea Griseb. Ruellia sarukhaniana Ramamoorthy Ruellia saulensis Wassh. Ruellia scabrifolia Valeton Ruellia scarlatina M.J.Silva Ruellia sceptrum-marianum (Vell.) Stearn Ruellia schlechtendaliana (Nees) Hemsl. Ruellia schnellii Wassh. Ruellia serrana Profice Ruellia sessilifolia Lindau Ruellia shaferiana Urb. Ruellia siamensis J.B.Imlay Ruellia sibua (Nees) I.M.Turner Ruellia silvaccola (Nees) Lindau Ruellia simplex C.Wright Ruellia singularis Benoist Ruellia siraensis Wassh. Ruellia sivarajanii Sreedevi, Remadevi & Binojk. Ruellia solitaria Vell. Ruellia sororia Standl. Ruellia spatulifolia Benoist Ruellia spectabilis (Hook.) G.Nicholson Ruellia spissa Leonard Ruellia splendidula Lindau Ruellia sprucei Lindau Ruellia stelligera Benoist Ruellia stemonacanthoides (Oerst.) Hemsl. Ruellia stenophylla C.B. Clarke Ruellia steyermarkii Wassh. Ruellia strepens L. Ruellia subringens Lindau Ruellia subsessilis (Nees) Lindau Ruellia taboleirana E.C.O.Chagas & Costa-Lima Ruellia tachiadena (Heine & A.Raynal) E.A.Tripp Ruellia tarapotana Lindau Ruellia terminalis (Nees) Wassh. Ruellia tessmannii Mildbr. Ruellia tetragona Link Ruellia tetrastichantha Lindau Ruellia thyrsostachya Lindau Ruellia togoensis (Lindau) Heine Ruellia tolimensis Leonard Ruellia trachyphylla Lindau Ruellia transitoria Benoist Ruellia treubiana Lindau Ruellia tuberosa L. Ruellia tubiflora Kunth Ruellia tubulata (Nees) Pav. ex B.D.Jacks. Ruellia turbinis Benoist