| |
| Aa | achalensis, fiebrigii, hieronymi, weddelliana |
| Abatia | angeliana, stellata |
| Abildgaardia | ovata |
| Abobra | tenuifolia |
| Abolboda | poarchon |
| Abrodictyum | rigidum |
| Abrotanella | diemii, emarginata, linearifolia, purpurea, submarginata, trichoachaenia, trilobata |
| Abrus | precatorius |
| Abuta | selloana |
| Abutilon | affine, bivalve, costicalyx, grandifolium, herzogianum, malachroides, megapotamicum, ramiflorum, terminale, thyrsodendron, umbelliflorum, vexillarium |
| Acaciella | angustissima |
| Acaena | alpina, antarctica, argentea, caespitosa, confertissima, eupatoria, fuscescens, integerrima, leptacantha, lucida, macrocephala, magellanica, masafuerana, myriophylla, ovalifolia, patagonica, pinnatifida, platyacantha, poeppigiana, pumila, sericea, splendens, stricta, tenera, trifida var. glabrescens, trifida var. trifida |
| Acalypha | amblyodonta, apetiolata, boliviensis, brasiliensis ssp. psilophylla, chaquensis, claussenii, communis ssp. paraguariensis, communis ssp. saltensis, communis ssp. tracheliifolia, communis ssp. communis, communis ssp. apicalis, digynostachya, gracilis, hassleriana, herzogiana, lycioides, multicaulis, omissa, plicata, poiretii, schreiteri, sehnemii, senilis, uleana, variabilis, velamea, villosa, wilkesiana |
| Acanthocalycium | ferrarii, glaucum, klimpelianum, spiniflorum, thionanthum |
| Acanthocladus | brasiliensis, dichromus |
| Acanthospermum | australe, consobrinum, hispidum |
| Acanthostachys | strobilacea |
| Acanthostyles | buniifolius |
| Acanthosyris | falcata, spinescens |
| Acaulimalva | nubigena |
| Acca | sellowiana |
| Acer | negundo, pseudoplatanus |
| Achatocarpus | balansae, brevipedicellatus, hasslerianus, microcarpus, praecox var. praecox, praecox f. obovatus, praecox f. spinulosus, praecox var. bicornutus |
| Achetaria | ocymoides |
| Achillea | millefolium, ptarmica |
| Achyranthes | aspera |
| Achyrocline | alata, anabelae, crassiuscula, flaccida, gardneri, gertiana, hyperchlora, luisiana, marchiorii, ramosissima, rupestris, saturejoides, tomentosa, vargasiana, venosa |
| Aciachne | acicularis |
| Acianthera | acuminatipetala, adirii, alborosea, aphthosa, atropurpurea, aurantio-lateritia, bicarinata, bidentula, boliviana, brachiloba, bragae, calopedilon, capanemae, crepiniana, crinita, cryptantha, dutrai, echinosa, exarticulata, fenestrata, glanduligera, glumacea, gouveiae, gracilisepala, hatschbachii, hoffmannseggiana, hygrophila, hystrix, karlii, klingelfusii, klotzscheana, leptotifolia, luteola, macropoda, macuconensis, mantiquyrana, marumbyana, murexoidea, muscosa, nemorosa, oligantha, panduripetala, papillosa, pardipes, pectinata, pubescens, ramosa, recurva, renipetala, rhabdosepala, saundersiana, saurocephala, serpentula, sonderana, spilantha, strupifolia, translucida, tricarinata, tristis, violaceomaculata, wageneriana |
| Acicarpha | bupleuroides, juergensii, obtusisepala, procumbens, spathulata, tribuloides |
| Acilepidopsis | echitifolia |
| Aciotis | paludosa |
| Acisanthera | alata, alsinaefolia, paraguayensis, uniflora, variabilis |
| Acmella | alpestris, bellidioides, brachyglossa, ciliata, decumbens var. decumbens, decumbens var. affinis, glaberrima, grisea, leptophylla, oleracea, oppositifolia, psilocarpa, pusilla, serratifolia |
| Acosmium | cardenasii, subelegans |
| Acrisione | cymosa, denticulata var. denticulata, denticulata var. pilota |
| Acroceras | excavatum, zizanioides |
| Acrocomia | aculeata, emensis, hassleri |
| Acronia | alopex |
| Acrostichum | aureum, danaeifolium |
| Actinocephalus | polyanthus |
| Actinostachys | pennula, subtrijuga |
| Actinostemon | concepcionis, concolor, klotzschii, roselii |
| Adelia | membranifolia |
| Adenaria | floribunda |
| Adenocalymma | apterospermum, bracteatum, comosum, dusenii, hatschbachii, marginatum, paulistarum, peregrinum, scansile |
| Adenocarpus | complicatus |
| Adenocaulon | chilense |
| Adenopeltis | serrata |
| Adenostemma | brasilianum, involucratum, verbesina |
| Adesmia | aconcaguensis, acuta, adrianii, aegiceras, ameghinoi, aphanantha, aphylla, arachnipes, araucana, araujoi, arenicola, argentea, argyrophylla, arillata, aromatica, aspera, atacamensis, aueri, aurantiaca, australis, balsamica, bedwellii, bicolor, bijuga, boelckeana, bonariensis, boronioides, brachysemeon, bracteata, brevivexillata, burkartii, calycicomosa, candida var. candida, candida var. cabrerae, capitellata, ciliata, colinensis, coluteoides, conferta, confusa, coquimbensis, cordobensis var. appendiculata, cordobensis var. cordobensis, coronilloides, corymbosa var. sinepenna, corymbosa var. corymbosa, crassicaulis, cuneata, curvifolia, cytisoides, darapskyana, davilae, denticulata, denudata, dessaueri, dichotoma, digitata, disperma, dumosa, echinus, elata, elegans, emarginata, eremophila, erinacea, exilis, filicaulis, filifolia, filipes, friesii, frigida, fuentesii, glandulifolia, glaucescens, globosa, glomerula var. australior, glomerula var. glomerula, glutinosa, godoyae, gracilis, gracillima, graminidea, grandiflora, guttulifera, hemisphaerica, hirsuta, horrida, hunzikeri, hystrix, incana var. grisea, incana var. oblata, incana var. incana, inflexa, jilesiana, karraikensis, lanata, landbecki, latifolia, laxa, leiocarpa, leptobotrys, lihuelensis, littoralis, longipes, longiseta, lotoides, loudonia, macrostachya, medinae, melanocaulos, melanthes, mendozana, micrantha, microcalyx var. calvescens, microcalyx var. microcalyx, microphylla, minor var. riojana, minor var. minor, minor var. caespitosa, miottoae, miraflorensis, monosperma, montana, mucronata, multicuspis, muricata var. muricata, muricata var. affinis, muricata var. gilliesii, muricata var. rionegrensis, muricata var. dentata, nanolignea, neglecta, neuquenensis, obcordata, obovata, obscura, occulta, odontophylla, ovallensis, pampeana, papposa var. papposa, papposa var. radicifolia, paranensis, parviflora, parvifolia, patagonica, pauciflora, pedicellata, pentaphylla, peraltae, phylloidea, pinifolia, pirionii, polyphylla, propinqua, prostrata var. prostrata, prostrata var. eglandulosa, pseudincana, pseudogrisea, psoraleoides, pumahuasiana, pumila, punctata var. sessiliflora, punctata var. punctata, pungens, pusilla, quadripinnata, ragonesei, rahmeri, ramosissima, reclinata, reitziana, renjifoana, resinosa, retrofracta, retusa, riograndensis, rocinhensis, rubroviridis, ruiz-lealii, salamancensis, salicornioides, sandwithii, sanjuanensis, schickendantzii, schneideri, securigerifolia, serrana, sessilifolia, silvestrii, smithiae, spinosissima, spuma, stenocaulon, subterranea, subtropicalis, suffocata, sulina, tehuelcha, tenella var. macrocarpa, tenella var. tenella, tenella var. misera, tomentosa, torcaea, trifoliata, trifoliolata var. trifoliolata, trifoliolata var. epunctata, trijuga, tristis, tunuianica, uspallatensis, vallsii, verrucosa, villosa, viscida, viscidissima, viscosa, volckmannii, zoellneri |
| Adetogramma | chrysolepis |
| Adiantopsis | × australopedata, cheilanthoides, chlorophylla, dichotoma, occulta, orbignyana, perfasciculata, radiata, recurvata, regularis, tweediana |
| Adiantum | abscissum, camptorachis, capillus-veneris, chilense var. scabrum, chilense var. chilense, curvatum, deflectens, delicatulum, digitatum, diogoanum, excisum, gertrudis, humile, incertum, intermedium, latifolium, lorentzii, macrophyllum, mathewsianum, obliquum, orbignyanum, papillosum, pearcei, pectinatum, pentadactylon, peruvianum, petiolatum, platyphyllum, poiretii f. bottini, poiretii f. poiretii, pseudotinctum, pulverulentum, raddianum, rodriguezii, serrato-dentatum, sulphureum var. majus, sulphureum var. sulphureum, terminatum, tetraphyllum, thalictroides var. hirsutum, viscosum, weatherbyanum, windischii |
| Aechmea | apocalyptica, bicolor, blumenavii var. alba, blumenavii var. blumenavii, bromeliifolia, calyculata var. calyculata, calyculata var. variegata, candida, caudata, coelestis, cylindrata, dealbata, distichantha var. glaziovii, distichantha f. albiflora, distichantha var. schlumbergeri, distichantha f. distichantha, gamosepala var. nivea, gamosepala var. gamosepala, gracilis, joannis var. alvipetala, joannis var. joannis, kertesziae var. kertesziae, kertesziae var. viridi-aurata, kleinii, leppardii, lindenii var. lindenii, lindenii var. makoyana, nudicaulis, organensis, ornata, pectinata, pimenti-velosoi, recurvata var. recurvata, recurvata var. ortgiesii, recurvata var. albobracteata, recurvata var. benrathii, rubroaristata, triangularis, winkleri |
| Aegiphila | australis, brachiata, fluminensis, graveolens, integrifolia, luschnathii, mediterranea, obducta, riedeliana, saltensis, verticillata, vitelliniflora |
| Aeschynomene | americana, denticulata, evenia var. serrulata, evenia var. evenia, fluminensis, fructipendula, indica, magna, montevidensis, paraguayensis, parviflora, pratensis var. caribaea, rudis, selloi, sensitiva |
| Aextoxicon | punctatum |
| Agalinis | communis, digitalis, fiebrigii, genistifolia, linarioides ssp. rojasii, linarioides ssp. linarioides, meyeniana, ramulifera |
| Agapanthus | africanus |
| Agarista | boliviensis, chlorantha, eucalyptoides, minensis, niederleinii var. acutifolia, niederleinii var. niederleinii, nummularia, oleifolia, paraguayensis, pulchella |
| Agave | americana |
| Agenium | leptocladum, majus, villosum |
| Ageratina | azangaroensis, glechonophylla, lorentzii, tenuis |
| Ageratum | conyzoides, fastigiatum |
| Agonandra | brasiliensis, excelsa |
| Agoseris | chilensis, coronopifolia |
| Agrimonia | hirsuta, parviflora, villosa |
| Agropyron | cristatum |
| Agrostemma | githago |
| Agrostis | ambatoensis, arvensis, brachyathera, breviculmis, capillaris, castellana, gigantea, glabra var. glabra, glabra var. melanthes, idahoensis, imberbis, inconspicua, insularis, lenis, leptotricha, longiberbis, masafuerana, mertensii, meyenii, montevidensis f. montevidensis, montevidensis f. submutica, nebulosa, perennans, philippiana, platensis, reuteri, scabra, serranoi, stolonifera var. palustris, stolonifera var. stolonifera, tolucensis, uliginosa, umbellata, vidalii, vinealis |
| Ailanthus | altissima |
| Aimara | rollinsii |
| Aiouea | acarodomatifera, amoena, glaziovii, hatschbachii, pseudoglaziovii, saligna, sellowiana, trinervis |
| Aira | caryophyllea, cupaniana, elegantissima, praecox |
| Airampoa | ayrampo |
| Alansmia | reclinata |
| Albizia | julibrissin, lophantha, pedicellaris |
| Alcea | rosea |
| Alchemilla | arvensis, bipinnatifida, grisebachiana, parodii, pinnata |
| Alchornea | castaneifolia, glandulosa ssp. iricurana, sidifolia, triplinervia |
| Aldama | adenotricha, amphichlora, anchusifolia var. anchusifolia, anchusifolia var. imarginata, aspilioides, atacamensis, bakeriana, breviflosculosa, densifolia, fabrisii, filifolia, gilliesii, helianthoides, knobiana, linearifolia, macrorhiza, megapotamica, meridionalis, misionensis, mollis, nudicaulis, paranensis, pilicaulis, pilosa, revoluta, robusta, santacatarinensis, squalida, trichophylla, tuberosa var. tuberosa, tuberosa var. guaranitica, tucumanensis |
| Aleurites | moluccanus |
| Alibertia | edulis, latifolia |
| Alicia | anisopetala |
| Alisma | lanceolatum, plantago-aquatica |
| Allagoptera | arenaria, campestris, leucocalyx |
| Allamanda | schottii |
| Allenrolfea | patagonica, vaginata |
| Alliaria | petiolata |
| Allionia | choisyi, incarnata |
| Allium | ampeloprasum, cepa, schoenoprasum, triquetrum, vineale var. vineale, vineale var. compactum |
| Allophylus | edulis, guaraniticus, pauciflorus, petiolulatus, puberulus, semidentatus |
| Almeidea | rubra |
| Alnus | acuminata, glutinosa, incana, rubra |
| Alocasia | macrorrhizos |
| Alonsoa | honoraria, meridionalis |
| Alopecurus | aequalis, bonariensis, geniculatus var. geniculatus, geniculatus var. patagonicus, heleochloides, hitchcockii, lechleri, magellanicus var. bracteatus, magellanicus var. magellanicus, myosuroides, pratensis |
| Aloysia | brasiliensis, castellanosii, catamarcensis, chamaedryfolia, citrodora, cordata, crenata, decipiens, deserticola, dusenii, fiebrigii, gratissima var. gratissima, gratissima var. sellowii, hatschbachii, oblanceolata, ovatifolia, polygalifolia, polystachya, riojana, salsoloides, salviifolia, schulziana, scorodonioides var. scorodonioides, scorodonioides var. mathewsii, tarapacana, trifida, virgata var. virgata, virgata var. platyphylla |
| Alseis | floribunda |
| Alshehbazia | friesii, hauthalii, werdermannii |
| Alsophila | capensis ssp. polypodioides, capensis ssp. capensis, cuspidata, elata, odonelliana, setosa, sternbergii |
| Alstroemeria | achirae, albescens, amabilis, andina var. andina, andina var. venustula, angustifolia var. angustifolia, angustifolia var. velutina, apertiflora, aurea, bakeri, citrina, crispata, cummingiana, cunha, diluta ssp. chrysantha, diluta ssp. diluta, esteparica, exerens, garavantae ssp. longaviensis, garaventae, graminea, hookeri ssp. recumbens, hookeri ssp. sansebastiana, hookeri ssp. hookeri, hookeri ssp. maculata, inodora, isabellana, kingii, leporina, ligtu ssp. ligtu, ligtu ssp. splendens, ligtu ssp. simsii, lutea, magnifica ssp. magenta, magnifica var. tofoensis, magnifica var. sierrae, magnifica ssp. magnifica, malmeana, marticorenae, maxima, mollensis, monantha, pallida, parvula, patagonica, pelegrina, philippii var. albicans, philippii var. philippii, piperata, polyphylla, presliana ssp. australis, presliana ssp. presliana, pseudospathulata, psittacina, pulchra ssp. pulchra, pulchra ssp. lavandulacea, pygmaea, revoluta, ribeirensis, schizanthoides var. schizanthoides, schizanthoides var. alba, sellowiana, spathulata, traudliae, umbellata, versicolor, violacea, werdermannii var. flavicans, werdermannii var. werdermannii, zoellneri |
| Alternanthera | albida, altacruzensis, aquatica, brasiliana var. villosa, brasiliana var. brasiliana, cana, caracasana, cinerella, collina, ficoidea, flavescens, halimifolia, hirtula var. hirsuta, hirtula var. hirtula, hirtula var. nitens, inaccessa, kurtzii ssp. sclerosperma, kurtzii ssp. kurtzii, lanceolata, littoralis var. maritima, micrantha, microphylla ssp. microphylla, microphylla ssp. maior, nodifera, paronychioides ssp. chacoensis, paronychioides ssp. pilosa, paronychioides ssp. paronychioides, pennelliana, philoxeroides f. philoxeroides, porrigens, puberula, pumila, pungens, reineckii, rufa, serpens, sessilis, suessenguthii |
| Alvaradoa | subovata |
| Alysicarpus | ovalifolius, vaginalis |
| Alyssum | alyssoides |
| Amaioua | guianensis, intermedia |
| Amaranthus | albus, asplundii ssp. asplundii, asplundii ssp. australis, blitoides, blitum ssp. emarginatus, blitum ssp. pseudogracilis, cardenasianus, caudatus, crispus, deflexus, dubius, hunzikeri, hybridus ssp. quitensis, hybridus ssp. cruentus, hybridus ssp. hybridus, kloosianus, lividus, lombardoi, looseri, muricatus, palmeri, pedersenianus, persimilis, peruvianus, retroflexus, rosengurttii, spinosus, standleyanus, viridis, vulgatissimus |
| Amaryllis | belladona |
| Amasonia | hirta |
| Amauropelta | achalensis, altitudinis, amambayensis, araucariensis, argentina, burkartii, cheilanthoides, concinna, decurtata, juergensii, jujuyensis, metteniana, mosenii, nubicola, oligocarpa, opposita, pachyrhachis, patula, platensis, pleiophylla, podotricha, ptarmica, raddii, recumbens, regnelliana, retusa, rivularioides, sanctae-catharinae, saxicola, stierii, tenerrima, vattuonei, yabotiensis |
| Amblyopappus | pusillus var. pusillus, pusillus var. pauciflorus |
| Ambrosia | arborescens, artemisiifolia, artemisioides, chamissonis, cumanensis, polystachya, scabra, tarapacana, tenuifolia |
| Amburana | cearensis |
| Ameghinoa | patagonica |
| Amelichloa | ambigua, brachychaeta, brevipes, caudata |
| Amicia | andicola, fimbriata, medicaginea |
| Ammannia | auriculata, coccinea, latifolia, robusta |
| Ammi | majus |
| Ammophila | arenaria |
| Ammoselinum | rosengurttii |
| Amomyrtella | guili |
| Amomyrtus | luma, meli |
| Amorimia | exotropica |
| Amorpha | fruticosa |
| Amphibromus | quadridentulus |
| Amphilophium | bracteatum, carolinae, crucigerum, dolichoides, dusenianum, elongatum, falcatum, paniculatum, pannosum, sandwithii, vauthieri |
| Amphipetalum | paraguayense |
| Amphiscirpus | nevadensis |
| Amsinckia | calycina, tessellata |
| Anacampseros | kurtzii, vulcanensis |
| Anacardium | humile |
| Anachoretes | castilloni |
| Anadenanthera | colubrina var. colubrina, colubrina var. glabra, colubrina var. cebil, peregrina |
| Anagallis | pumila |
| Ananas | ananassoides, bracteatus var. bracteatus, bracteatus var. tricolor, fritzmuelleri |
| Anaphalis | chilensis |
| Anarthrophyllum | andicolum, burkartii, capitatum, catamarcense, cumingii, desideratum var. mustersii, desideratum var. morenonis, desideratum var. desideratum, elegans, gayanum, macrophyllum, ornithopodum, patagonicum, pedicellatum, rigidum, strigulipetalum, subandinum |
| Anathallis | adenochila, aristulata, bertoniensis, bleyensis, bocainensis, brevipes, caroli, ciliolata, citrina, corticicola, dryadum, ferdinandiana, gert-hatschbachii, globifera, heloisae f. camboriensis, heterophylla, imbricata, ipyrangana, johnsonii, klingelfusii, laciniata, linearifolia, malmeana, marginata, microphyta, modesta, muscoidea, obovata, petersiana, piratiningana, rubens, rubrolimbata, rudolfii, sclerophylla, seidelii, sororcula, vitorinoi |
| Anatherostipa | brevis, hans-meyeri |
| Anchietea | exalata, pyrifolia |
| Anchusa | officinalis |
| Ancistrotropis | clitorioides, firmula, peduncularis, serrana |
| Andeimalva | chilensis |
| Andira | anthelmia, fraxinifolia, humilis, inermis |
| Andropogon | arenarius, barretoi, bicornis, coloratus, exaratus, gayanum, glaucophyllus, glaziovii, hypogynus, lateralis, leucostachyus, lindmanii, macrothrix, selloanus, subtilior, ternatus, virgatus |
| Androsace | salasii |
| Anemia | australis, ferruginea var. ferruginea, ferruginea var. ahenobarba, herzogii, imbricata, lanata, mandioccana, myriophylla, phyllitidis var. phyllitidis, phyllitidis var. tweedieana, phyllitidis var. pluripinnae, raddiana, simplicior, tomentosa var. tomentosa, tomentosa var. anthriscifolia, trichorhiza var. paraguariensis, villosa, warmingii, wettsteinii |
| Anemonastrum | antucense |
| Anemone | decapetala var. decapetala, hepaticifolia, moorei, multifida, rigida, sellowii, triternata |
| Anemopaegma | arvense, chamberlaynii, flavum, glaucum, longipetiolatum, nebulosum, prostratum |
| Anethum | graveolens |
| Angelonia | integerrima, perennis, salicariifolia |
| Aniba | firmula |
| Aniseia | argentina, luxurians, martinicensis |
| Anisocapparis | speciosa |
| Anisomeria | coriacea, littoralis |
| Annona | cacans, calophylla, campestris, coriacea, cornifolia, crassiflora, crotonifolia, dioica, dolabripetala, emarginata, glabra, glaucophylla, maritima, montana, mucosa, neosalicifolia, neosericea, nutans, paraguayensis, rugulosa, sylvatica |
| Anoda | cristata, hastata |
| Anogramma | leptophylla, lorentzii |
| Anomospermum | reticulatum ssp. nitidum, reticulatum ssp. reticulatum |
| Anredera | cordifolia, diffusa, krapovickasii, tucumanensis |
| Antennaria | chilensis var. magellanica, chilensis var. chilensis, sleumeri |
| Anthaenantia | lanata |
| Anthaenantiopsis | fiebrigii, perforata, rojasiana, trachystachya |
| Anthemis | arvensis, cotula |
| Anthericum | argentinense, hickenianum, volcanense |
| Anthodon | decussatum |
| Anthoxanthum | juncifolium, moorei, odoratum, pusillum, redolens var. redolens, redolens var. gunckelii, spicatum, utriculatum var. altissimum, utriculatum var. utriculatum |
| Anthriscus | caucalis, sylvestris |
| Anthurium | acutum, comtum, coriaceum, gaudichaudianum, hatschbachii , loefgrenii, marense, maximiliani, paraguayense, pentaphyllum, pilonense, plowmanii, scandens, sellowianum, sinuatum, urvilleanum |
| Antidaphne | punctulata |
| Antigonon | leptopus |
| Antiphytum | berroi, charruasorum, cruciatum |
| Antirrhinum | majus |
| Apalanthe | granatensis |
| Aparisthmium | cordatum |
| Apera | interrupta |
| Aphanes | berteroana f. vegeta, berteroana f. berteroana, looseri, neglecta |
| Aphelandra | chamissoniana, hieronymi, liboniana, lilacina, longiflora, ornata, schottiana |
| Aphyllocladus | denticulatus var. calvus, denticulatus var. denticulatus, ephedroides, sanmartinianus, spartioides |
| Aphyllon | chilense |
| Apinagia | guairaensis, richardiana, riedelii |
| Apium | australe, chilense, commersonii, fernandezianum, graveolens, panul, pimpinellifolium, prostratum, sellowianum |
| Apoclada | simplex |
| Apodanthera | anatuyana, hirtella, laciniosa, linearis var. linearis, linearis var. dissecta, sagittifolia, ulei |
| Apodasmia | chilensis |
| Aponogeton | distachyos |
| Apopyros | corymbosus |
| Aptenia | cordifolia |
| Apteria | aphylla |
| Apuleia | leiocarpa |
| Apurimacia | dolichocarpa |
| Aquilegia | vulgaris |
| Arabidopsis | thaliana |
| Arachis | batizocoi, burkartii, cardenasii, correntina, diogoi, duranensis, glabrata var. glabrata, glabrata var. hagenbeckii, guaranitica, hassleri, hoehnei, lignosa, major, monticola, nitida, paraguariensis, Pflugeae, pintoi, pseudovillosa, repens, schininii, stenophylla, stenosperma, villosa |
| Arachniodes | denticulata |
| Arachnitis | uniflora |
| Araeoandra | tenuicaulis |
| Aralia | soratensis, warmingiana |
| Araucaria | angustifolia, araucana |
| Araujia | angustifolia, brachystephana, hassleriana, herzogii, megapotamica, odorata, plumosa, scalae, sericifera, stormiana, stuckertiana ssp. grandiflora, stuckertiana ssp. stuckertiana, variegata |
| Archidasyphyllum | diacanthoides, excelsum |
| Arctium | minus |
| Arctotheca | calendula |
| Arctotis | stoechadifolia |
| Ardisia | guianensis |
| Arenaria | achalensis, catamarcensis, digyna, groenlandica, jussiaei, lanuginosa var. lanuginosa, lanuginosa var. megalantha, lanuginosa var. diffusa, lanuginosa var. ensifolia, pycnophylloides, rivularis, serpens, serpyllifolia |
| Argemone | crassifolia, hunnemannii, rosea, subfusiformis |
| Argentina | anserina |
| Argylia | adscendens var. adscendens, adscendens var. viridis, bifrons, bustillosii, checoensis, conaiensis, farnesiana, geranioides, glutinosa, potentillifolia, radiata, robusta, tomentosa, uspallatensis |
| Argyranthemum | frutescens |
| Argyrochosma | chilensis, flava, nivea, tenera |
| Argythamnia | acaulis, breviramea, jablonszkyana, malpighipila, montevidensis, salina, sellowiana |
| Aristeguietia | salvia |
| Aristida | achalensis, adscensionis, antoniana, asplundii var. pauciflora, asplundii var. asplundii, brasiliensis, circinalis, condylifolia, constricta, echinulata, ekmaniana, filifolia, flaccida, friesii, glaziovii, hackelii, hassleri, jubata, laevis, laxa var. longiramea, macrantha, macrophylla, megapotamica var. longipes, megapotamica var. brevipes, megapotamica var. megapotamica, mendocina, minutiflora var. glabriflora, minutiflora var. minutiflora, multiramea, murina, nicorae, oligospira, pallens, parodii, pedroensis, pubescens, recurvata, riograndensis, riparia, sayapensis, spegazzinii, subulata, teretifolia, trachyantha, uruguayensis var. laevis, uruguayensis var. uruguayensis, valida, venustula var. venustula, venustula var. scabrifolia, venustula var. venustuloides, vexativa, victoriana |
| Aristolochia | angustifolia, arcuata, argentina, barbata ssp. benedicti, bridgesii, burelae, castellanosii, ceresensis, chamissonis, chilensis, curviflora, elegans, esperanzae, fimbriata, gibertii, gigantea, holostylis, labiata, lindneri, lingua, melanoglossa, melastoma, odoratissima, paulistana, pearcei, prostrata, pyrifolia, ridicula, robertii, rojasiana, sessilifolia, stomachoidis, stuckertii, triangularis, trilobata, warmingii, wendeliana |
| Aristotelia | chilensis |
| Arjona | longifolia, megapotamica, patagonica, pusilla, tuberosa var. tuberosa, tuberosa var. tandilensis |
| Armeria | maritima |
| Arnica | angustifolia |
| Arquita | mimosifolia, trichocarpa |
| Arrhenatherum | elatius var. elatius, elatius var. bulbosum |
| Artemisia | abrotanum, absinthium, annua, copa var. copa, copa var. trifida, douglasiana, echegarayi, magellanica, mendozana var. paramilloënsis, mendozana var. mendozana, verlotiorum |
| Arthropogon | villosus, xerachne |
| Arthropteris | altescandens |
| Arthrosia | auriculata, caldensis, floribunda, malachantha, myrticola |
| Artocarpus | heterophyllus |
| Arum | italicum |
| Arundinella | berteroniana, hispida |
| Arundo | donax |
| Aschersoniodoxa | cachensis |
| Asclepias | barjoniifolia, bracteolata, candida, curassavica, langsdorffii, mellodora, pilgeriana |
| Asemeia | acuminata, extraaxillaris, hebeclada, hirsuta, rhodoptera, tobatiensis, violacea |
| Asparagus | aethiopicus, asparagoides, densiflorus, officinalis var. altilis, scoparius, setaceus |
| Aspasia | lunata |
| Asperugo | procumbens |
| Asphodelus | fistulosus |
| Aspicarpa | schininii |
| Aspidogyne | argentea, bicolor, bidentifera, bruxellii, commelinoides, debilis, fimbrillaris, foliosa, kuczynskii, lindleyana, longicornu, malmei, metallescens, serripetala |
| Aspidosperma | australe, camporum, cuspa, cylindrocarpon, macrocarpon, nobile, parvifolium, polyneuron, pyricollum, pyrifolium, quebracho-blanco, ramiflorum, riedelii, subincanum, tomentosum, triternatum |
| Aspilia | attenuata, aurantiaca var. aurantiaca, aurantiaca var. vulcanica, camporum, clausseniana, floribunda, foliacea, hassleriana, latissima, leucanthema, linearis, montevidensis, pascalioides, phyllostachya, reflexa, riedelii, silphioides |
| Asplenium | abscissum, achalense, aethiopicum, alatum, argentinum, atlanticum, auriculatum, auritum, balansae, bradei, brasiliense, campos-portoi, castaneum, cirrhatum, claussenii, cristatum, cuspidatum, dareoides, depauperatum, drepanophyllum, feei, flabellulatum, formosum, gastonis, gilliesii, harpeodes, inaequilaterale, incurvatum, kunzeanum, lacinulatum, lilloanum, lorentzii, macrosorum, martianum, monanthes, mucronatum, muellerianum, obtusatum var. obtusatum, obtusatum var. sphenoides, oligophyllum, otites, palmeri, papaverifolium, patagonicum, peruvianum, polyodon var. squamulosum, pseudonitidum, pteropus, pulchellum, pumilum, raddianum, radicans, resiliens, scandicinum, sellowianum, serra, serratum, squamosum, stellatum, stuebelianum, sylvaticum, trilobum, triphyllum, ulbrichtii, uniseriale, wacketii |
| Asplundia | brachypus, glaucophylla |
| Astelia | pumila |
| Asteranthera | ovata |
| Asteriscium | aemocarpon, argentinum, chilense, closii, famatinense, fimbriatum, glaucum, novarae, vidali |
| Asteropsis | megapotamica |
| Asterostigma | lividum, reticulatum, tweedianum |
| Astraea | cincta, gracilis, jatropha, lobata, manihot, paulina |
| Astragalus | amatus, ameghinoi, anni-novi, arequipensis, argentinus, arnottianus, asplundii, austroargentinus, bellus, bergii, berteri, berteroanus, boelckei, bonariensis, burkartii, bustillosii, cachinalensis, carinatus, chamissonis, chubutensis, colhuensis, complicatus, confinis, coquimbensis, cruckshanksii, crymophilus, cryptanthus, crypticus, cryptobotrys, curvicaulis, cuyanus, darumbium, darwinianus, diminutivus var. diminutivus, diminutivus var. dielsii, distinens, dodtii, domeykoanus, edmonstonei, fabrisii, famatinae, flavocreatus, garbancillo, germainii, hickenii, hypsogenus, illinii, joergensenii, johnstonii, limariensis, looseri, magellanicus, maulensis, mendocinus, micranthellus, minimus, minutissimus, monteroi, monticola, moyanoi, nelidae, neoburkartianus, neocarpus, neuquenensis, nicorae, nivicola, nudus, orthocarpus, palenae var. grandiflora, palenae var. palenae, paposanus, parodii, patagonicus, pauranthus, pehuenches, peruvianus, pissisii, pulviniformis, punae, pusillus, reichei, ruiz-lealii, sanctae-crucis, schinetorum, spegazzinii, tacorensis, tarijensis, tehuelches, triflorus, trifoliatus, uniflorus, urbanianus , vagus, valerianensis, venturii, verticillatus, vesiculosus, weddellianus, werdermannii |
| Astrocaryum | aculeatissimum |
| Astrolepis | sinuata |
| Astronium | fraxinifolium var. fraxinifolium, fraxinifolium var. glabrum, gracile var. acuminatum, gracile var. gracile, graveolens |
| Asynthema | gracile |
| Atacama | nivea |
| Atacamallium | minutiflorum |
| Atamisquea | emarginata |
| Ateleia | glazioveana |
| Athenaea | brasiliana, fasciculata, picta, tomentosa, wettsteiniana |
| Athroostachys | capitata |
| Athyana | weinmanniifolia |
| Athyrium | filix-femina |
| Atriplex | ameghinoi, argentina, atacamensis, boecheri, braunii, chapinii, chilensis, chizae, clivicola, coquimbana, cordubensis ssp. cordubensis, cordubensis ssp. grandibracteata, costellata, crenatifolia, eximia, frigida, glaucescens, hortensis, hystrix, imbricata var. foliolosa, imbricata var. imbricata, lampa, leuca, lithophila, madariagae, mendozensis, micrantha, montevidensis, myriophylla, nitrophiloides, nummularia, oreophila, pamparum, patagonica, patula, peruviana, philippii, prostrata, quixadensis, repanda, retusa, rosea, sagittifolia, semibaccata, sorianoi, spegazzinii, suberecta, taltalensis, tatarica, undulata, vallenarensis, vulgatissima |
| Attalea | dubia, exigua, phalerata |
| Augustea | anomala, coquimbensis, moreirana, suffruticosa |
| Aulonemia | aristulata, cincta, effusa, lanciflora, radiata |
| Austroblechnum | × rodriguezii, asperum, corralense, divergens, fernandezianum, lechleri, lehmannii, microphyllum, organense, penna-marina, squamipes |
| Austrobrickellia | arnottii, patens var. rhodolaena, patens var. tomentosa, patens var. patens |
| Austrocactus | aonikenkensis, bertinii, colloncurensis, coxii, ferrarii, hibernus ssp. robustior, hibernus ssp. hibernus, longicarpus, nobilis, patagonicus, pauxillus, philippii, praecox, spiniflorus, subandinus |
| Austrocedrus | chilensis |
| Austrochthamalia | major, teyucuarensis |
| Austrocritonia | velutina |
| Austrocylindropuntia | miquelii, shaferi var. shaferi, shaferi var. humahuacana, verschaffeltii, vestita |
| Austroeupatorium | apense, inulifolium, laetevirens, neglectum, picturatum, rosmarinaceum, silphiifolium |
| Austroflourensia | fiebrigii, hirtissima, niederleinii, suffrutescens, thurifera, tortuosa |
| Austroliabum | candidum, eremophilum, glanduliferum |
| Austrolycopodium | alboffii, confertum, erectum, magellanicum, paniculatum |
| Austropeucedanum | oreopansil |
| Austrostipa | plumigera, scabra |
| Avellanita | bustillosii |
| Avena | barbata, byzantina var. byzantina, byzantina var. biaristata, byzantina var. hipomelanathera, fatua, sativa var. macrathera, sativa var. setulosa, sativa var. subuniflora, sativa var. montana, sativa var. sativa, sativa var. pilosa, sativa var. chinensis, sterilis ssp. sterilis, sterilis ssp. ludoviciana, strigosa |
| Avenella | flexuosa |
| Averrhoidium | paraguaiense |
| Avicennia | germinans, schaueriana |
| Axonopus | argentinus, aureus, brasiliensis, capillaris, chrysoblepharis, comans, compressus, equitans, fissifolius, leptostachyus, marginatus, obtusifolius, pellitus, polystachyus, pressus, purpusii, rosengurttii, scoparius, siccus, succulentus, suffultus, uninodis |
| Ayapana | amygdalina |
| Ayapanopsis | esperanzae, tucumanensis |
| Ayenia | acalyphifolia, aprica, cordobensis, eliae, krapovickasii, lingulata, magna, mansfeldiana, nummularia, odonellii, praecipua, spinulosa, subtilis, tomentosa |
| Aylacophora | deserticola |
| Azara | alpina, celastrina, dentata, integrifolia, lanceolata, microphylla, petiolaris, salicifolia, serrata var. serrata, serrata var. fernandeziana, uruguayensis |
| Azolla | cristata, filiculoides |
| Azorella | acaulis, albovaginata, ameghinoi, andina, biloba, boelckei, burkartii, compacta, crassipes, cryptantha, diversifolia, echegarayi, filamentosa, fuegiana, hallei, lycopodioides, madreporica, microphylla, monantha, monteroi, nivalis, patagonica, prolifera, ranunculus, ruizii, selago, spinosa, triacantha var. triacantha, triacantha var. famatinense, trifoliolata, trifurcata, trisecta, ulicina, valentini |
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