| Xyris aberdarica Malme |
| Xyris acrophila Malme |
| Xyris affinis Welw. ex Rendle |
| Xyris albescens Steyerm. |
| Xyris almae Kral & Wand. |
| Xyris ambigua Beyr. ex Kunth |
| Xyris amorimii Kral |
| Xyris anceps Lam. |
| Xyris anceps var. anceps |
| Xyris anceps var. minima (Steud.) Lock |
| Xyris andina Malme |
| Xyris angularis N.E.Br. |
| Xyris angustifolia De Wild. & T.Durand |
| Xyris anisophylla Welw. ex Rendle |
| Xyris apureana Kral & L.B.Sm. |
| Xyris aquatica Idrobo & L.B.Sm. |
| Xyris aracamunae Kral |
| Xyris arachnoidea Maguire & L.B.Sm. |
| Xyris araracuarae Maguire & L.B.Sm. |
| Xyris archeri L.B.Sm. & Downs |
| Xyris aristata N.E.Br. |
| Xyris asperula Mart. |
| Xyris asterotricha Lock |
| Xyris atrata Malme |
| Xyris atriceps Malme |
| Xyris atrovirida Doust & B.J.Conn |
| Xyris augusto-coburgii Szyszyl. ex Beck |
| Xyris aurea L.B.Sm. & Downs |
| Xyris bahiana Malme |
| Xyris baldwiniana Schult. |
| Xyris bampsii Lisowski |
| Xyris bancana Miq. |
| Xyris barteri N.E.Br. |
| Xyris bialata Malme |
| Xyris bicarinata Griseb. |
| Xyris bicephala Gleason |
| Xyris bicostata Maguire & L.B.Sm. |
| Xyris bicostata var. tillettii (L.B.Sm.) Kral |
| Xyris bissei Urquiola & Kral |
| Xyris blanchetiana Malme |
| Xyris blepharophylla Mart. |
| Xyris boliviana Kral |
| Xyris brachyfolia Kral & Wand. |
| Xyris brachysepala Kral |
| Xyris bracteata R.Br. |
| Xyris brevifolia Michx. |
| Xyris byssacea Kral |
| Xyris cachimbensis L.B.Sm. & Downs |
| Xyris calcicola E.L.Bridges & Orzell |
| Xyris calderonii Kral, L.B.Sm. & Wand. |
| Xyris calostachys Paulsen ex Warm. |
| Xyris caparaoensis Wand. |
| Xyris capensis Thunb. |
| Xyris capensis var. capensis |
| Xyris capensis var. medullosa N.E.Br. |
| Xyris capillaris Malme |
| Xyris capnoides Malme |
| Xyris carinata Maguire & L.B.Sm. |
| Xyris caroliniana Walter |
| Xyris celiae L.B.Sm. & Downs |
| Xyris cheumatophila Doust & B.J.Conn |
| Xyris chimantae Kral & L.B.Sm. |
| Xyris ciliata Thunb. |
| Xyris cipoensis L.B.Sm. & Downs |
| Xyris columbiana Malme |
| Xyris complanata R.Br. |
| Xyris concinna N.E.Br. |
| Xyris confusa L.B.Sm. & Downs |
| Xyris congensis Büttner |
| Xyris connosepala Lanj. & Lindeman |
| Xyris consanguinea Kunth |
| Xyris consolida Kral & L.B.Sm. |
| Xyris contracta Maguire & L.B.Sm. |
| Xyris coronata Haines |
| Xyris correlliorum E.L.Bridges & Orzell |
| Xyris coutensis Wand. & Cerati |
| Xyris cryptantha Maguire & L.B.Sm. |
| Xyris cuatrecasana Idrobo & L.B.Sm. |
| Xyris culmenicola Steyerm. |
| Xyris curassavica Kral & Urquiola |
| Xyris cylindrostachya Kral & Wand. |
| Xyris cyperoides Gleason |
| Xyris dardanoi Wand. |
| Xyris dawsonii L.B.Sm. & Downs |
| Xyris decipiens N.E.Br. |
| Xyris decussata Gleason |
| Xyris delicatula Maguire & L.B.Sm. |
| Xyris densa Malme |
| Xyris diamantinae Malme |
| Xyris diaphanobracteata Kral & Wand. |
| Xyris difformis Chapm. |
| Xyris difformis var. curtissii (Malme) Kral |
| Xyris difformis var. difformis |
| Xyris dilatatiscapa Kral & Jans.-Jac. |
| Xyris dilungensis Brylska |
| Xyris dissimilis Malme |
| Xyris dissitifolia Kral & Wand. |
| Xyris disticha L.B.Sm. & Downs |
| Xyris downsiana L.B.Sm. |
| Xyris drummondii Malme |
| Xyris ednae Lock |
| Xyris egleri L.B.Sm. & Downs |
| Xyris ekmanii Malme |
| Xyris elegantula Malme |
| Xyris eleocharoides Kral & L.B.Sm. |
| Xyris elliottii Chapm. |
| Xyris erosa Lock |
| Xyris erubescens Rendle |
| Xyris esmeraldae Steyerm. |
| Xyris exigua Malme |
| Xyris exilis Doust & B.J.Conn |
| Xyris fallax Malme |
| Xyris ferreirae Kral |
| Xyris festucifolia Hepper |
| Xyris fibrosa Kral & Wand. |
| Xyris filifolia L.A.Nilsson |
| Xyris filiformis Lam. |
| Xyris fimbriata Elliott |
| Xyris flabelliformis Chapm. |
| Xyris flexifolia R.Br. |
| Xyris floridana (Kral) E.L.Bridges & Orzell |
| Xyris foliolata L.A.Nilsson |
| Xyris formosana Hayata |
| Xyris frequens Maguire & L.B.Sm. |
| Xyris friesii Malme |
| Xyris frondosa Maguire & L.B.Sm. |
| Xyris fugaciflora Rendle |
| Xyris fuliginea Kral & L.B.Sm. |
| Xyris fusca L.A.Nilsson |
| Xyris gerrardii N.E.Br. |
| Xyris glandacea L.A.Nilsson |
| Xyris globosa L.A.Nilsson |
| Xyris glochidiata Kral & L.B.Sm. |
| Xyris gongylospica Kral |
| Xyris gossweileri Malme |
| Xyris goyazensis Malme |
| Xyris gracilis R.Br. |
| Xyris gracillima F.Muell. |
| Xyris graminosa Pohl ex Mart. |
| Xyris grandiceps Griseb. |
| Xyris grandis Ridl. |
| Xyris graniticola Kral |
| Xyris grisebachii Malme |
| Xyris guaranitica Malme |
| Xyris guianensis Steud. |
| Xyris guillauminii Conert |
| Xyris guillenii Kral |
| Xyris harleyi Kral & L.B.Sm. |
| Xyris hatschbachii L.B. Sm. & Downs |
| Xyris hatschhachii L.B.Sm. & Downs |
| Xyris hilariana Malme |
| Xyris huberi Kral & L.B.Sm. |
| Xyris humpatensis N.E.Br. |
| Xyris hymenachne Mart. |
| Xyris hystrix Seub. |
| Xyris imitatrix Malme |
| Xyris inaequalis N.A.Wakef. |
| Xyris indica L. |
| Xyris indivisa N.A.Wakef. |
| Xyris insignis L.A.Nilsson |
| Xyris intersita Malme |
| Xyris involucrata Nees |
| Xyris isoetifolia Kral |
| Xyris itambensis Kral & Wand. |
| Xyris itatiayensis (Malme) Wand. & Sajo |
| Xyris jataiana Kral & Wand. |
| Xyris jolyi Wand. & Cerati |
| Xyris juncea R.Br. |
| Xyris juncifolia Maguire & L.B.Sm. |
| Xyris jupicai Rich. |
| Xyris kibaraensis Lisowski |
| Xyris kornasiana Brylska & Lisowski |
| Xyris kradungensis B.Hansen |
| Xyris kukenaniana Kral |
| Xyris kundelungensis Brylska |
| Xyris kwangolana P.A.Duvign. & Homes |
| Xyris lacera R.Br. |
| Xyris lacerata Pohl ex Seub. |
| Xyris laevigata L.A.Nilsson |
| Xyris lagoinhae Kral & L.B.Sm. |
| Xyris lanata R.Br. |
| Xyris laniceps Lock |
| Xyris lanuginosa Seub. |
| Xyris lanulobractea Steyerm. |
| Xyris laxiflora F.Muell. |
| Xyris laxifolia Mart. |
| Xyris laxifolia var. iridifolia (Chapm.) Kral |
| Xyris laxifolia var. laxifolia |
| Xyris lejolyanus Lisowski |
| Xyris leonensis Hepper |
| Xyris leptophylla Malme |
| Xyris liesneri Kral |
| Xyris linifolia P.Royen |
| Xyris lithophila Kral & L.B.Sm. |
| Xyris lobbii Rendle |
| Xyris lomatophylla Mart. |
| Xyris longibracteata Britton & P.Wilson |
| Xyris longifolia Mart. |
| Xyris longiscapa L.A.Nilsson |
| Xyris longisepala Kral |
| Xyris lucida Malme |
| Xyris luetzelburgii Malme |
| Xyris lugubris Malme |
| Xyris lutescens Kral & Wand. |
| Xyris macbrideana L.B.Sm. & Downs |
| Xyris machrisiana L.B.Sm. & Downs |
| Xyris madagascariensis Malme |
| Xyris makuensis N.E.Br. |
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| Xyris mallocephala Lock |
| Xyris malmeana L.B.Sm. |
| Xyris mantuensis Urquiola & Kral |
| Xyris marginata Rendle |
| Xyris maxima Doust & B.J.Conn |
| Xyris melanopoda L.B.Sm. & Downs |
| Xyris melanovaginata Kral & L.B.Sm. |
| Xyris mello-barretoi L.B.Sm. & Downs |
| Xyris membranibracteata Kral & L.B.Sm. |
| Xyris mentiens Lock |
| Xyris mertensiana Körn. ex Malme |
| Xyris metallica Klotzsch ex Seub. |
| Xyris mexiae Malme |
| Xyris mexicana S.Watson |
| Xyris mima L.B.Sm. & Downs |
| Xyris minarum Seub. |
| Xyris montana Ries |
| Xyris moraesii L.B.Sm. & Downs |
| Xyris morii Kral & L.B.Sm. |
| Xyris mucujensis Kral & L.B.Sm. |
| Xyris muelleri Malme |
| Xyris natalensis L.A.Nilsson |
| Xyris navicularis Griseb. |
| Xyris neblinae Maguire & L.B.Sm. |
| Xyris neglecta L.A.Nilsson |
| Xyris neocaledonica Rendle |
| Xyris nigrescens Kral |
| Xyris nigricans L.A.Nilsson |
| Xyris nilssonii Malme |
| Xyris nivea Welw. ex Rendle |
| Xyris nubigena Kunth |
| Xyris obcordata Kral & Wand. |
| Xyris oblata Kral & L.B.Sm. |
| Xyris obscura N.E.Br. |
| Xyris obtusiuscula L.A.Nilsson |
| Xyris oligantha Steud. |
| Xyris operculata Labill. |
| Xyris organensis Malme |
| Xyris ornithoptera Lock |
| Xyris oxylepis Idrobo & L.B.Sm. |
| Xyris paleacea Kral & Urquiola |
| Xyris pallidula Kral & Wand. |
| Xyris panacea L.C.Anderson & Kral |
| Xyris pancheri Rendle |
| Xyris paradisiaca Wand. |
| Xyris paraensis Poepp. ex Kunth |
| Xyris paraensis var. longiceps (Malme) L.B.Sm. & Downs |
| Xyris parvula Malme |
| Xyris pauciflora Willd. |
| Xyris pectinata Kral, L.B.Sm. & Wand. |
| Xyris peteri Poelln. |
| Xyris phaeocephala Kral & Wand. |
| Xyris picea Kral & Wand. |
| Xyris pilosa Kunth |
| Xyris piraquarae L.B.Sm. & Downs |
| Xyris piresiana L.B.Sm. & Downs |
| Xyris plantaginea Mart. |
| Xyris platylepis Chapm. |
| Xyris platystachya Nilsson ex Malme |
| Xyris popeana Lisowski |
| Xyris porcata Lock |
| Xyris porphyrea Lock |
| Xyris pranceana Kral & Wand. |
| Xyris pratensis Maguire & L.B.Sm. |
| Xyris prolificans Kral |
| Xyris ptariana Steyerm. |
| Xyris pterygoblephara Steud. |
| Xyris pterygoblephara var. pterygoblephara |
| Xyris pumila Rendle |
| Xyris ramboi L.B.Sm. & Downs |
| Xyris regnellii L.A.Nilsson |
| Xyris rehmannii L.A.Nilsson |
| Xyris reitzii L.B.Sm. & Downs |
| Xyris retrorsifimbriata Kral & L.B.Sm. |
| Xyris rhodesiana Malme |
| Xyris rhodolepis (Malme) Lock |
| Xyris rigida Kunth |
| Xyris rigidiformis Malme |
| Xyris riparia Maguire & L.B.Sm. |
| Xyris roraimae Malme |
| Xyris roycei N.A.Wakef. |
| Xyris rubella Malme |
| Xyris rubrolimbata Heimerl |
| Xyris rubromarginata Kral & L.B.Sm. |
| Xyris rupicola Kunth |
| Xyris sanguinea Verm. ex Malme |
| Xyris savanensis Miq. |
| Xyris scabridula Rendle |
| Xyris scabrifolia R.M.Harper |
| Xyris sceptrifera Kral & Wand. |
| Xyris schizachne Mart. |
| Xyris schliebenii Poelln. |
| Xyris schneeana L.B.Sm. & Steyerm. |
| Xyris serotina Chapm. |
| Xyris setigera Oliv. |
| Xyris seubertii L.A.Nilsson |
| Xyris seubertii var. seubertii |
| Xyris sincorana Kral & Wand. |
| Xyris smalliana Nash |
| Xyris sororia Kunth |
| Xyris sparsifolia Kral & L.B.Sm. |
| Xyris spathacea Lanj. |
| Xyris spectabilis Mart. |
| Xyris spinulosa Kral & L.B.Sm. |
| Xyris spruceana Malme |
| Xyris stenocephala Malme |
| Xyris stenophylla L.A.Nilsson |
| Xyris stenophylloides Malme |
| Xyris stenostachya Steyerm. |
| Xyris straminea Nilsson |
| Xyris stricta Chapm. |
| Xyris stricta var. obscura Kral |
| Xyris subaristata Malme |
| Xyris subasperula Kral |
| Xyris subglabrata Malme |
| Xyris subsetigera Malme |
| Xyris subtilis Lock |
| Xyris subulata Ruiz & Pav. |
| Xyris subulata var. acutifolia Heimerl |
| Xyris subulata var. subulata |
| Xyris subuniflora Malme |
| Xyris sulcatifolia Kral |
| Xyris surinamensis A.Spreng. |
| Xyris symoensii Brylska & Lisowski |
| Xyris tasmanica (D.I.Morris) Doust & B.J.Conn |
| Xyris tatei Malme |
| Xyris teinosperma Idrobo & L.B.Sm. |
| Xyris tenella Kunth |
| Xyris tenella var. tenella |
| Xyris tennesseensis Kral |
| Xyris teres L.A.Nilsson |
| Xyris teretifolia R.Br. |
| Xyris terrestris Idrobo & L.B.Sm. |
| Xyris theodori Malme |
| Xyris thysanolepis Maguire & L.B.Sm. |
| Xyris thysanolepis var. sipapoa (Maguire & L.B.Sm.) Kral & L.B.Sm. |
| Xyris thysanolepis var. thysanolepis |
| Xyris tomentosa L.B.Sm. & Downs |
| Xyris toronoana Kral |
| Xyris torta Sm. |
| Xyris tortilis Wand. |
| Xyris tortula Mart. |
| Xyris trachyphylla Mart. |
| Xyris trachysperma Kral & Duiv. |
| Xyris trichophylla Malme |
| Xyris tristis L.B.Sm. & Downs |
| Xyris tuberosa Ridl. |
| Xyris uleana Malme |
| Xyris uleana var. angustifolia Lanj. |
| Xyris uleana var. uleana |
| Xyris uninervis Malme |
| Xyris unistriata Malme |
| Xyris ustulata L.A.Nilsson |
| Xyris vacillans Malme |
| Xyris valdeapiculata Kral |
| Xyris valida Malme |
| Xyris venezolana Malme |
| Xyris veruina Malme |
| Xyris vestita Malme |
| Xyris villosicarinata Kral & Wand. |
| Xyris vivipara Kunth |
| Xyris wallichii Kunth |
| Xyris wawrae Heimerl |
| Xyris welwitschii Rendle |
| Xyris witsenioides Oliv. |
| Xyris wurdackii Maguire & L.B.Sm. |
| Xyris xiphophylla Maguire & L.B.Sm. |