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| Wahlenbergia berteroi | CHL(JFE) | 
| Wahlenbergia brasiliensis | BRA(RGS, SCA) | 
| Wahlenbergia calycina | ARG(JUJ, SAL, TUC) | 
| Wahlenbergia fernandeziana | CHL(JFE) | 
| Wahlenbergia grahamiae | CHL(JFE) | 
| Wahlenbergia linarioides | ARG(BAI, CAT, COR, COS, ERI, FOR, JUJ, LPA, MEN, MIS, RNE, SAL, SJU, SLU, SFE, SDE, TUC) / BRA(PAR, RGS, SCA) / CHL(COQ, VAL, LBO, MAU, BIO, ARA, LLA, RME) / PRY(APA, CAU, CAA, CEN, GUA, ÑEE, PAI) / URY(MON) | 
| Wahlenbergia marginata | BRA(PAR, SCA) | 
| Wahlenbergia masafuerae | CHL(JFE) | 
| Wahlenbergia peruviana | ARG(JUJ, SAL, TUC) | 
| Wahlenbergia tuberosa | CHL(JFE) | 
| Waltheria albicans | ARG(SAL, SDE) / PRY(APY, AMA, PHA) | 
| Waltheria carmensarae | ARG(COS) / PRY(ITA, ÑEE) | 
| Waltheria carpinifolia | BRA(PAR, RGS, SCA) | 
| Waltheria communis | ARG(COS, ERI, FOR, JUJ, MIS, SAL) / BRA(PAR, RGS, SCA) / PRY(APY, APA, AMA, CAU, CAA, CAN, CEN, CON, COA, GUA, ITA, MIE, ÑEE, PAI, PHA, SPE) / URY(ART, RIV) | 
| Waltheria indica | ARG(CAT, COR, COS, FOR, JUJ, LRI, MIS, SAL, SDE, TUC) / BRA(PAR, RGS, SCA) / CHL(AYP, IPA) / PRY(APY, APA, AMA, CAN, CEN, CON, COA, GUA, ITA, MIE, PAI, PHA, SPE) | 
| Waltheria macrophylla | PRY(CAU) | 
| Waltheria operculata | PRY(APY, CON) | 
| Waltheria ovata | CHL(TAR) | 
| Waltheria procumbens | PRY(AMA) | 
| Waltheria viscosissima | PRY(AMA, CON) | 
| Warmingia eugenii | ARG(MIS) / BRA(PAR, RGS, SCA) / PRY(APA, CAN) | 
| Warrea warreana | ARG(MIS) / BRA(PAR, RGS, SCA) / PRY(APA, CAN) | 
| Watsonia borbonica  ssp. ardernei | ARG(BAI) | 
| Weberbauera densifolia | ARG(CAT, JUJ) | 
| Weberbauera herzogii | ARG(JUJ, SAL) | 
| Weberbauera orophila | ARG(CAT, JUJ, LRI, TUC) / CHL(AYP) | 
| Weberbauera peruviana | ARG(CAT, JUJ, SAL, TUC) | 
| Weberbauerella chilensis | CHL(TAR, ATA) | 
| Wedelia brachylepis | ARG(CHA, FOR, JUJ, MIS, SAL, SDE, TUC) / PRY(APY, BOQ, CON) | 
| Wedelia buphtalmiflora | ARG(BAI, CAT, COR, LPA, LRI, SAL, SJU, SLU, SDE, TUC) | 
| Wedelia holwayi | ARG(JUJ, SAL) | 
| Wedelia kerrii | ARG(CHA, COS, MIS) / BRA(PAR) / PRY(APA, ITA) | 
| Wedelia monantha | ARG(MIS) / BRA(PAR) / PRY(APA, CAU, CAN) | 
| Wedelia saltensis | ARG(CAT, COR, JUJ, SAL, TUC) | 
| Wedelia trichostephia | BRA(PAR, RGS) | 
| Weingartia neumanniana | ARG(JUJ) | 
| Weinmannia boliviensis | ARG(JUJ, SAL) | 
| Weinmannia discolor | BRA(PAR, RGS, SCA) | 
| Weinmannia humilis | BRA(PAR, RGS, SCA) | 
| Weinmannia organensis | BRA(PAR, SCA) | 
| Weinmannia paulliniifolia | BRA(PAR, RGS, SCA) | 
| Weinmannia pinnata | BRA(PAR, SCA) | 
| Weinmannia trichosperma | ARG(CHU, NEU, RNE, SCR) / CHL(MAU, BIO, ARA, LSR, LLA, AIS, MAG) | 
| Werneria apiculata | ARG(CAT, JUJ, LRI, SAL, TUC) | 
| Werneria aretioides | ARG(JUJ, SAL) / CHL(AYP, TAR, ANT) | 
| Werneria cochlearis | ARG(CAT, JUJ, LRI, SAL, TUC) / CHL(ANT) | 
| Werneria digitata | CHL(AYP, TAR, ANT) | 
| Werneria glaberrima | CHL(AYP, TAR, ANT) | 
| Werneria incisa | ARG(CAT, JUJ, SAL) / CHL(ANT) | 
| Werneria juniperina | CHL(AYP) | 
| Werneria lorochaqui | ARG(CAT, JUJ, SAL, TUC) | 
| Werneria nubigera | ARG(JUJ, SAL) | 
| Werneria orbignyana | CHL(AYP, TAR, ANT) | 
| Werneria poposa | ARG(CAT, JUJ, LRI, SAL, TUC) / CHL(AYP, TAR, ANT) | 
| Werneria praetermissa | ARG(JUJ, SAL) | 
| Werneria pseudodigitata | ARG(JUJ, SAL) | 
| Werneria pumila | ARG(SAL) | 
| Werneria pygmaea  var. pygmaea | ARG(CAT, JUJ, LRI, MEN, NEU, SAL, SJU, SCR, TUC) / CHL(AYP, TAR, ANT, ATA, COQ, VAL, AIS, RME) | 
| Werneria rosenii | ARG(JUJ) | 
| Werneria solivifolia | CHL(AYP, TAR) | 
| Werneria spathulata | ARG(JUJ, SAL, TUC) / CHL(AYP, TAR, ANT) | 
| Werneria villosa | ARG(JUJ, SAL, TUC) | 
| Werneria weddellii | CHL(AYP, TAR, ANT) | 
| Wettsteiniola apipensis | ARG(COS) | 
| Wettsteiniola pinnata | BRA(PAR) | 
| Wigginsia calvescens | ARG(COS) | 
| Wigginsia corynodes | URY(ROC) | 
| Wigginsia erinacea | BRA(PAR, RGS, SCA) | 
| Wigginsia gladiata | URY(SAO) | 
| Wigginsia pauciareolata | ARG(ERI) / URY(SOR) | 
| Wigginsia schaeferiana | ARG(COS) | 
| Wigginsia sessiliflora | ARG(BAI, COR, LPA, RNE) / URY(RNO) | 
| Wigginsia tephracantha | ARG(BAI) / URY(COL) | 
| Wilbrandia ebracteata  var. bracteata | ARG(MIS) | 
| Wilbrandia ebracteata  var. ebracteata | ARG(COS, MIS) / BRA(PAR, RGS, SCA) / PRY(APY, APA, CAU, CAN, GUA, SPE) | 
| Wilbrandia ebracteata  var. pedunculata | ARG(MIS) / PRY(PAI, SPE) | 
| Wilbrandia hibiscoides | BRA(PAR, RGS, SCA) | 
| Wilbrandia longisepala | BRA(PAR, RGS, SCA) | 
| Wilbrandia verticillata | BRA(PAR, RGS, SCA) / PRY(COA) | 
| Willkommia texana | ARG(BAI) / URY(RNO, RIV) | 
| Wissadula contracta | BRA(PAR) | 
| Wissadula decora | ARG(COS, FOR) / PRY(PHA) | 
| Wissadula densiflora  var. densiflora | ARG(CAT, CHA, COR, ERI, FOR, JUJ, LRI, MIS, SAL, SFE, SDE, TUC) / PRY(APY, PHA) | 
| Wissadula densiflora  var. schulzii | ARG(CHA) | 
| Wissadula excelsior | ARG(MIS) / BRA(Fuera del área del proyecto) / PRY(AMA) | 
| Wissadula glechomifolia | ARG(COS, ERI, MIS) / BRA(RGS) / URY(CAS, PAY) | 
| Wissadula gymnanthemum | ARG(CAT, COR, JUJ, LRI, SAL, SDE, SJU, SLU, TUC) | 
| Wissadula hernandioides | ARG(CHA, COS, FOR, JUJ, MIS, SAL, SFE) / BRA(PAR, RGS) / PRY(APY, AMA, CON, COA, GUA, PAI, PHA) | 
| Wissadula indivisa | PRY(CON) | 
| Wissadula krapovickasiana | PRY(APY, CON, COA) | 
| Wissadula macrantha  var. macrantha | PRY(APY, CON, PHA) | 
| Wissadula macrantha  var. brevipedunculata | PRY(PAI) | 
| Wissadula paraguariensis | ARG(CHA, COS, FOR, MIS) / PRY(APY, CEN, CON, PAI, PHA) | 
| Wissadula parviflora | ARG(MIS) / BRA(PAR, RGS, SCA) | 
| Wissadula periplocifolia | BRA(PAR) | 
| Wissadula setifera | ARG(COS) / PRY(APY) | 
| Wissadula tucumanensis | ARG(JUJ, SAL, SDE, TUC) | 
| Wissadula wissadifolia | ARG(JUJ, SAL) | 
| Wittmackia bicolor | BRA(SCA) | 
| Wittrockia cyathiformis | BRA(PAR, SCA) | 
| Wittrockia superba | BRA(PAR, RGS, SCA) | 
| Wolffia brasiliensis | ARG(BAI, CHA, COR, COS, ERI, FOR, JUJ, MIS, SAL, SFE) / BRA(PAR, RGS, SCA) / CHL(BIO) / PRY(APY, APA) / URY(MON) | 
| Wolffia columbiana | ARG(BAI, CHA, COR, COS, ERI, LRI, SAL, SJU, SFE, TUC) / BRA(PAR, RGS) / PRY(APY) / URY(CAS, MON, TYT) | 
| Wolffiella lingulata | ARG(BAI, CHA, COS, ERI, FOR, MIS, SFE) / BRA(RGS) / PRY(APY, CEN, COA) / URY(MON) | 
| Wolffiella oblonga | ARG(BAI, CHA, CHU, COR, COS, FOR, JUJ, LPA, RNE, SAL, SFE, TUC) / BRA(PAR, RGS, SCA) / CHL(VAL, MAU, RME) / PRY(APY, CEN, COA) / URY(CAS, FLA, MON, ROC, SJO, TYT) | 
| Wullschlaegelia aphylla | ARG(COS, MIS) / BRA(PAR, RGS, SCA) / PRY(APA, CAU, CAN, GUA) | 
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