Abies balsamea (order Pinales)

Abies bornmuelleriana (synonymous, order Pinales)

Abies bracteata (order Pinales)

Abies cephalonica (order Pinales)

Abies concolor (order Pinales)

Abies equi-trojani (synonymous, order Pinales)

Abies forrestii (order Pinales)

Abies homolepis (order Pinales)

Abies koreana (order Pinales)

Abies nordmanniana (order Pinales)

Abies numidica (order Pinales)

Abies pindrow (order Pinales)

Abies pinsapo (order Pinales)

Abies squamata (order Pinales)

Abies vejarii (order Pinales)

Abietinella abietina (order Hypnales)

Abraxas sylvata (order Lepidoptera)

Abromeitiella brevifolia (synonymous, order Poales)

Abrothallus cetrariae (order Abrothallales)

Abrothallus microspermus (order Abrothallales)

Abrothallus usneae (order Abrothallales)

Abrus precatorius (order Fabales)

Acacia cornigera (order Fabales)

Acacia farnesiana (synonymous, order Fabales)

Acacia glaucoptera (order Fabales)

Acacia melanoxylon (order Fabales)

Acacia pendula (order Fabales)

Acacia rigidula (synonymous, order Fabales)

Acanthocardia tuberculata (order Veneroida)

Acanthospermum australe (order Asterales)

Acanthus mollis (order Lamiales)

Acarospora cervina (order Acarosporales)

Acarospora intricata (synonymous, order Acarosporales)

Acarospora scotica (order Acarosporales)

Acarospora umbilicata (order Acarosporales)

Acinopus picipes (order Coleoptera)

Acis autumnalis (order Asparagales)

Acer campestre (order Sapindales)

Acer monspessulanum (order Sapindales)

Acer palmatum (order Sapindales)

Acer platanoides (order Sapindales)

Acer pseudoplatanus (order Sapindales)

Aceras anthropophorum (synonymous, order: Asparagales)

Aceria pseudoplatani (order Tormbidiformes)

Acetabularia calyculus (order Dasycladales)

Achatina fulica (order Pulmonata)

Acherontia atropos (order Lepidoptera)

Achillea filipendulina (order Asterales)

Achillea millefolium (order Asterales)

Acmaeoderella lanuginosa (order Coleoptera)

Acokanthera oblongifolia (order Gentianales)

Aconitum lycoctonum (synonymous, order Ranunculales)

Aconitum vulparia (order Ranunculales)

Acoridium wenzelii (order Asparagales)

Acrostichum danaeifolium (order Polypodiales)

Acrostichum speciosum (order Polypodiales)

Acrotylus insubricus (order Orthoptera)

Actinia equina (order Actiniaria)

Actinotaenium curtum (order Desmidiales)

Acyrthosiphon pisum (order Hemiptera)

Adalia bipunctata (order Coleoptera)

Adansonia digitata (order Malvales)

Adansonia gregorii (order Malvales)

Adelges laricis (order Hemiptera)

Adenia cordifolia (order Malpighiales)

Adenia lapiazicola (order Malpighiales)

Adenia metamorpha (order Malpighiales)

Adenocarpus complicatus (order Fabales)

Adenocarpus foliolosus (order Fabales)

Adenocarpus hispanicus (order Fabales)

Adenocarpus mannii (order Fabales)

Adenocarpus viscosus (order Fabales)

Adiantum capillus-veneris (order Polypodiales)

Adiantum hispidulum (order Polypodiales)

Adiantum pulverulentum (order Polypodiales)

Adiantum raddianum (order Polypodiales)

Adiantum reniforme (order Polypodiales)

Adiantum seemannii (order Polypodiales)

Adiantum silvaticum (order Polypodiales)

Adiantum trapeziforme (order Polypodiales)

Adiantum venustum (order Polypodiales)

Adoneta pygmaea (order Lepidoptera)

Adonis annua (order Ranunculales)

Adonis microcarpa (order Ranunculales)

Adromischus cooperi (order Saxifragales)

Adromischus cristatus (order Saxifragales)

Adromischus marianae (order Saxifragales)

Aechmea bracteata (order Poales)

Aechmea fasciata (order Poales)

Aechmea recurvata (order Poales)

Aedes albopictus (order Diptera)

Aegiceras corniculatum (order Ericales)

Aegilops geniculata (order Poales)

Aegilops triuncialis (order Poales)

Aegopodium podagraria (order Apiales)

Aelia rostrata (order Hemiptera)

Aeonium aureum (order Saxifragales)

Aeonium burchardii (order Saxifragales)

Aeonium canariense (order Saxifragales)

Aeonium cuneatum (order Saxifragales)

Aeonium haworthii (order Saxifragales)

Aeonium percarneum (order Saxifragales)

Aeonium simsii (order Saxifragales)

Aeonium urbicum (order Saxifragales)

Aequipecten opercularis (order Ostreoida)

Aerangis citrata (order Asparagales)

Aeromonas hydrophila (order Aeromonadales)

Aeropus sibiricus (synonymous, order Orthoptera)

Aesculus flava (order Sapindales)

Aesculus hippocastanum (order Sapindales)

Aeshna cyanea (order Odonata)

Aeshna juncea (order Odonata)

Aeshna mixta (order Odonata)

Afrocarpus falcatus (order Pinales)

Afrocarpus gracilior (order Pinales)

Afrotrioza bersama (order Hemiptera)

Agapanthia asphodeli (order Coleoptera)

Agapanthia dahli (order Coleoptera)

Agapanthia villosoviridescens (order Coleoptera)

Agapanthus praecox (order Asparagales)

Agaricus albertii (synonymous, order Agaricales)

Agaricus arvensis (order Agaricales)

Agaricus bernardii (order Agaricales)

Agaricus bisporus (order Agaricales)

Agaricus bitorquis (order Agaricales)

Agaricus bresadolanus (order Agaricales)

Agaricus campestris (order Agaricales)

Agaricus crocodilinus (order Agaricales)

Agaricus impudicus (order Agaricales)

Agaricus iodosmus (order Agaricales)

Agaricus langei (order Agaricales)

Agaricus litoralis (order Agaricales)

Agaricus macrosporus (synonymous, order Agaricales)

Agaricus pilatianus (synonymous, order Agaricales)

Agaricus urinascens (synonymous, order Agaricales)

Agaricus xanthoderma (order Agaricales)

Agarista salicifolium (order Ericales)

Agathis macrophylla (order Pinales)

Agathis robusta (order Pinales)

Agathomyia wankowiczii (order Diptera)

Agave americana (order Asparagales)

Agave asperrima (order Asparagales)

Agave ferox (synonymous, order Asparagales)

Agave montana (order Asparagales)

Agave polianthiflora (order Asparagales)

Agave potatorum (order Asparagales)

Agave salmiana (order Asparagales)

Agave striata (order Asparagales)

Agelaea pentagyna (order Oxalidales)

Agellas citrina (order Agelasida)

Agenioideus ruficeps (order Hymenoptera)

Ageratum conyzoides (order Asterales)

Aglais urticae (order Lepidoptera)

Aglaonema commutatum (order Alismatales)

Agonimia allobata (order Verrucariales)

Agonimia opuntiella (order Verrucariales)

Agrimonia eupatoria (order Rosales)

Agrocybe aegerita (synonymous, order Agaricales)

Agrocybe cylindracea (synonymous, order Agaricales)

Agrocybe rivulosa (order Agaricales)

Agropyron cristatum (order Poales)

Agrotis ipsilon (order Lepidoptera)

Agrotis trux (order Lepidoptera)

Agrypnia varia (order Trichoptera)

Aiolopus puissanti (order Orthoptera)

Aiphanes minima (order Arecales)

Aiptasia diaphana (order Actiniaria)

Aizoon canariense (order Caryophyllales)

Aizoon hispanicum (order Caryophyllales)

Ajuga reptans (order Lamiales)

Akebia micrantha (synonymous, order Ranunculales)

Akebia quinata (order Ranunculales)

Akis acuminata (order Coleoptera)

Akis aff italica (order Coleoptera)

Albuca bracteata (order Asparagales)

Albugo candida (order Albuginales)

Alchemilla argyrophylla (order Rosales)

Alchemilla johnstonii (order Rosales)

Alcyonium palmatum (order Alcyonacea)

Alectoria ochroleuca (order Lecanorales)

Alectoria sarmentosa (order Lecanorales)

Alectoris rufa (order Galliformes)

Alectura lathami (order Galliformes)

Alisma plantago-aquatica (order Alismatales)

Alliardia petiolata (order Brassicales)

Alligator mississippiensis (order Crocodilia)

Allium ampeloprasum (order Asparagales)

Allium cupani (order Asparagales)

Allium hirtifolium (synonymous, order Asparagales)

Allium stipitatum (order Asparagales)

Allium triquetrum (order Asparagales)

Allium ursinum (order Asparagales)

Allocasuarina littoralis (order Fagales)

Allophylus arboreus (order Sapindales)

Alluaudia ascendens (order Caryophyllales)

Alluaudia dumosa (order Caryophyllales)

Almana longipes (order Hemiptera)

Alnus cordata (order Fagales)

Alnus glutinosa (order Fagales)

Alnus incana (order Fagales)

Alnus viridis (order Fagales)

Alocasia odora (order Alismatales)

Aloe aristata (synonymous, order Asparagales)

Aloe barbadensis (synonymous, order Asparagales)

Aloe barberae (order Asparagales)

Aloe bellatula (order Asparagales)

Aloe berevoana (order Asparagales)

Aloe brevifolia (order Asparagales)

Aloe ciliaris (order Asparagales)

Aloe dichotoma (order Asparagales)

Aloe dorotheae (order Asparagales)

Aloe helenae (order Asparagales)

Aloe jucunda (order Asparagales)

Aloe juvenna (order Asparagales)

Aloe macra (order Asparagales)

Aloe millotii (order Asparagales)

Aloe plicatilis (order Asparagales)

Aloe variegata (order Asparagales)

Aloe vera (order Asparagales)

Aloina aloides (order Pottiales)

Aloina ambigua (order Pottiales)

Alopecurus monspeliensis (synonymous, order Polypodiales)

Alopecurus pratensis (order Poales)

Aloysia citridora (order Lamiales)

Aloysia gratissima (order Lamiales)

Aloysia triphylla (synonymous, order Lamiales)

Alsomitra schefferiana (synonymous, order Cucurbitales)

Alsophila australis (order Cyatheales)

Alsophila dealbata (order Cyatheales)

Alsophila excelsa (synonymous, orden Cyatheales)

Alsophila manniana (order Cyatheales)

Alsophila smithii (order Cyatheales)

Alsine parnassica (order Caryophyllales)

Alternaria alternata (order Pleosporales)

Althaea hirsuta (order Malvales)

Altica aff lythri (order Coleoptera)

Alydus calcaratus (order Hemiptera)

Alyssum alyssoides (order Brassicales)

Alyssum granatense (order Brassicales)

Alyssum robertianum (order Brassicales)

Alyssum simplex (order Brassicales)

Amandinea punctata (order Telostchistales)

Amanita excelsa (order Agaricales)

Amanita muscaria (order Agaricales)

Amanita pantherina (order Agaricales)

Amanita phalloides (order Agaricales)

Amanita porphyria (order Agaricales)

Amanita proxima (order Agaricales)

Amaranthus retroflexus (order Caryophyllales)

Amaranthus viridis (order Caryophyllales)

Amathia verticillata (order Ctenostomatida)

Amblystegium riparium (synonymous, order Hypnales)

Amegilla quadrifasciata (order Hymenoptera)

Ameles decolor (order Mantodea)

Ameles spallanziana (order Mantodea)

Ammannia coccinea (synonymous, order Myrtales)

Ammannia robusta (order Myrtales)

Ammobiota festiva (synonymous, order Lepidoptera)

Ammophila arenaria (order Poales)

Ammophila campestris (order Hymenoptera)

Amorphophallus ankarana (order Alismatales)

Amorphophallus bulbifer (order Alismatales)

Amorphophallus paeoniifolius (order Alismatales)

Amorphophallus prainii (order Alismatales)

Amorphophallus titanum (order Alismatales)

Amphimallon pygiale (order Coleoptera)

Amphimedon compressa (order Haplosclerida)

Amphiroa fragilissima (order Corallinales)

Amyris texana (order Sapindales)

Anabaena azollae (order Nostocales)

Anabasis setifera (order Caryophyllales)

Anacampseros filamentosa (order Caryophyllales)

Anacamptis pyramidalis (order Asparagales)

Anaceratagallia aff venosa (order Hemiptera)

Anacridium aegyptium (order Orthoptera)

Anacyclus clavatus (order Asterales)

Anacyclus valentinus (order Asterales)

Anagallis arvensis (order Ericales)

Anagallis tenella (order Ericales)

Anaptychia ciliaris (order Teloschistales)

Anaptychia runcinata (order Teloschistales)

Anarrhinum bellidifolium (order Lamiales)

Anax ephippiger (synonymous, order Odonata)

Anax imperator (order Odonata)

Anax parthenope (order Odonata)

Ancylolomia aff tentaculella (order Lepidoptera)

Ancylus fluviatilis (order Pulmonata)

Ancyrosoma leucogrammes (order Hemiptera)

Andreaea kilimandscharica (order Andreaeales)

Andreaea mildbraedii (synonymous, order Andreaeales)

Andreaea regularis (order Andreaeales)

cf. Andricus polymorphae (order Hymenoptera)

Andricus quercustozae (order Hymenoptera)

Andrioplecta shoreae (order Lepidoptera)

Andropogon contortum (synonymous, order Poales)

Andropogon ischaemum (synonymous, order Poales)

Androsace studiosorum (order Ericales)

Androsace vitaliana (order Ericales)

Andryala integrifolia (order Asterales)

Andryala pinnatifida (order Asterales)

Andryala ragusina (order Asterales)

Anelosimus vittatus (order Araneae)

Anema nummularium (order Lichinales)

Anemia phyllitidis (order Schizaeales)

Anemone blanda (order Ranunculales)

Anemone nemorosa (order Ranunculales)

Anemone ranunculoides (order Ranunculales)

Anemone thomsonii (order Ranunculales)

Anemonia viridis (order Actiniaria)

Angaria poppei (order Vetigastropoda)

Angiopteris evecta (order Marattiales)

Angiopteris lygodifolia (order Marattiales)

Angiopteris madagascariensis (order Marattiales)

Anguis fragilis (order Squamata)

Anigozanthos flavidus (order Commelinales)

Anisolabis maritima (order Dermaptera)

Anisophyllea disticha (order Cucurbitales)

Anisoplia baetica (order Coleoptera)

Annona cheimola (order Magnoliales)

Annona glabra (order Magnoliales)

Annona muricata (order Magnoliales)

Anodonta anatina (order Unionida)

Anodontia alba (synonymous, order Unionida)

Anogcodes seladonius (order Coleoptera)

Anolis sagrei (order Squamata)

Anomia ephippium  (order Ostreoida)

Anomobryum julaceum (order Bryales)

Anomodon viticulosus (order Hypnales)

Anoxia australis (order Coleoptera)

Anoxia villosa (order Coleoptera)

Antaxius hispanicus (order Orthoptera)

Anthia sexmaculatum (order Coleoptera)

Anthocleista longifolia (order Gentianales)

Anthospermum emirnense (order Gentianales)

Anthospermum usambarense (order Gentianales)

Anthoxanthum alpinum (synonymous, order Poales)

Anthoxanthum aristatum (order Poales)

Anthoxanthum odoratum (order Poales)

Anthurus archeri (order Phallales)

Anthyllis cytisoides (order Fabales)

Anthyllis hermanniae (order Fabales)

Anthyllis vulneraria (order Fabales)

Antirrhinum charidemi (order Lamiales)

Antirrhinum majus (order Lamiales

Antirrhinum subbaeticum (order Lamiales)

Antitrichia kilimanjarica (order Hypnales)

Anzia afromontana (order Lecanorales)

Aphidius testaceipes (synonymous, order Hymenoptera)

Apate monachus (order Coleoptera)

Aphis clematidis (order Hemiptera)

Aphis fabae (order Hemiptera)

Aphis nerii (order Hemiptera)

Aphis sambuci (order Hemiptera)

Aphis sanguisorbae (order Hemiptera)

Aphis aff tirucallis (order Hemiptera)

Aphelandra aurantiaca (order Lamiales)

Aphodius sp (order Coleoptera)

Aphrophora salicina (order Hemiptera)

Apiognomia veneta (order Diaporthales)

Apis mellifera (order Hymenoptera)

Apollonias barbujana (order Laurales)

Aporrhais pespelicani (order Sorbeoconcha)

Apteromantis aptera (order Mantodea)

Apus apus (order Apodiformes)

Aquarius najas (order Hemiptera)

Aquilegia vulgaris (order Ranunculales)

Araneus angulatus (order Araneae)

Araneus cornutus (synonymous, order Araneae)

Araneus flavidus (synonymous, order Araneae)

Araneus quadratus (order Araneae)

Araniella maderiana (order Araneae)

Arabis alpina (order Brassicales)

Araucaria angustifolia (order Pinales)

Araucaria araucana (order Pinales)

Araucaria bidwillii (order Pinales)

Araucaria biramulata (order Pinales)

Araucaria cookii  (synonymous, order Pinales)

Araucaria columnaris (order Pinales)

Araucaria cunninghamii (order Pinales)

Araucaria excelsa (synonymous, order Pinales)

Araucaria heterophylla (order Pinales)

Araucaria hunsteinii (order Pinales)

Araucaria montana (order Pinales)

Araucaria rulei (order Pinales)

Araujia sericifera (order Gentianales)

Arbutus unedo (order Ericales)

Arbutus xalapensis (order Ericales)

Arca noae (order Arcoida)

Arca zebra (order Arcoida)

Arceuthobium juniperi (synonymous, order Santalales)

Arceuthobium oxycedri (order Santalales)

Architectonica perspectiva (order Heterostropha)

Arctia festiva (order Lepidoptera)

Arctium minus (order Asterales)

Arctoparmelia centrifuga (order Lecanorales)

Arctosa perita (order Araneae)

Arctostaphylos pungens (order Ericales)

Arctostaphylos uva-ursi (order Ericales)

Ardea purpurea (order Pelecaniformes)

Areca kinabaluensis (order Arecales)

Arecaceae sp nov (order Arecales)

Arenaria armerina (order Caryophyllales)

Arenaria grandiflora (order Caryophyllales)

Arenaria montana (order Caryophyllales)

Arenaria obtusiflora (order Caryophyllales)

Arenaria tetraquetra (order Caryophyllales)

Arenga australasica (order Arecales)

Arenga undulatifolia (order Arecales)

Argas vespertilionis (order Ixodida)

Argemone mexicana (order Ranunculales)

Argiope bruennichi (order Araneae)

Argiope lobata (order Araneae)

Argyranthemum teneriffae (order Asterales)

Argyrolobium zanonii (order Fabales)

Arhopalus ferus (order Coleoptera)

Arianta arbustorum (order Pulmonata)

Ariocarpus retusus (order Caryophyllales)

Arion rufus (order Pulmonata)

Arion subfuscus (order Pulmonata)

Arisaema speciosum (order Alismatales)

Arisarum simorrhinum (order Alismatales)

Arisarum vulgare (order Alismatales)

Aristaloe aristata (order Asparagales)

Aristea abyssinica (order Asparagales)

Aristolochia grandiflora (order Piperales)

Aristolochia elegans (synonymous,  order Piperales)

Aristolochia littoralis (order Piperales)

Aristolochia macrophylla (order Piperales)

Aristolochia paucinervis (order Piperales)

Aristolochia pistolochia (order Piperales)

Aristolochia triangularis (order Piperales)

Aristolochia trilobata (order Piperales)

Aristolochia veraguensis (order Piperales)

Armeria maritima (order Caryophyllales)

Armillaria bulbosa (synonymous, order Agaricales)

Armillaria gallica (order Agaricales)

Armillaria mellea (order Agaricales)

Arnoglossus laterna (order Pleuronectiformes)

Arrhenantherum elatius (order Poales)

Arrhenia spathulata (order Agaricales)

Ascochyta fabae (synonymous, order Pleosporales)

Ascochyta lentis (synonymous, order Pleosporales)

Ascochytella passeriniana (order Botryosphaeriales)

Artemisia absinthium (order Asterales)

Artemisia afra (order Asterales)

Artemisia arborescens (order Asterales)

Artemisia assoana (order Asterales)

Artemisia canariensis (synonymous, order Asterales)

Artemisia thuscula (order Asterales)

Arthonia aspiciliae (order Arthoniales)

Arthonia calcarea (order Arthoniales)

Arthonia cinnabarina (order Arthoniales)

Arthonia clemens (order Arthoniales)

Arthonia galactites (order Arthoniales)

Arthonia glaucomaria ( synonymous, order Arthoniales)

Arthonia leucopellaea (order Arthoniales)

Arthonia melanophthalma (order Arthoniales)

Arthonia meridionalis (order Arthoniales)

Arthonia molendoi (order Arthoniales)

Arthonia radiata (order Arthoniales)

Arthonia subfuscicola (order Arthoniales)

Arthonia urceolata (order Arthoniales)

Arthonia varians ( synonymous, order Arthoniales)

Arthophacopsis parmeliarum (order Arthoniales)

Arthopyrenia aff analepta (order Pleosporales)

Arthopyrenia lapponina (synonymous, order Pleosporales)

Arthropodium cirratum (order Asparagales)

Arthropteris tenella (order Polypodiales)

Arthrorhaphis citrinella (order Lecanorales)

Artocarpus heterophyllus (order Rosales)

Arum italicum (order Alismatales)

Arum maculatum (order Alismatales)

Arundo donax (order Poales)

Asaphis violascens (order Veneroida)

Asclepias curassavica (order Gentianales)

Asclepias physocarpa (synonymous, order Gentianales)

Ascophyllum nodosum (order Fucales)

Asida dubia (synonymous, order Coleoptera)

Asimina triloba (order Magnoliales)

Asparagus africanus (order Asparagales)

Asparagus albus (order Asparagales)

Asparagus aphyllus (order Asparagales)

Asparagus falcatus (order Asparagales)

Asparagus madagascariensis (synonymous, order Asparagales)

Asparagus plocamoides (order Asparagales)

Asparagus plumosus (synonymous, order Asparagales)

Asparagus scoparius (order Asparagales)

Asparagus setaceus (order Asparagales)

Asparagus simulans (order Asparagales)

Aspergillus niger  (order Eurotiales)

Asperula cynanchica (order Gentianales)

Asphodelus fistulosus (order Asparagales)

Asphodelus ramosus (order Asparagales)

Aspicilia calcarea (order Pertusariales)

Aspicilia contorta (order Pertusariales)

Aspicilia desertorum (order Pertusariales)

Aspicilia fruticulosa (order Pertusariales)

Aspicilia fruticulosofoliacea (synonymous, order Pertusariales)

Aspicilia intermutans (order Pertusariales)

Aspicilia praeradiosa (order Pertusariales)

Aspicilia radiosa (order Pertusariales)

Aspitates ochrearia (order Lepidoptera)

Asplenium adiantum-nigrum (order Polypodiales)

Asplenium aethiopicum (order Polypodiales)

Asplenium australasicum (order Polypodiales)

Asplenium billotii (order Polypodiales)

Asplenium fontanum (order Polypodiales)

Asplenium hemionitis (order Polypodiales)

Asplenium loxoscapoides (order Polypodiales)

Asplenium lucidum (order Polypodiales)

Asplenium nidus (order Polypodiales)

Asplenium onopteris (order Polypodiales)

Asplenium ruta-muraria (order Polypodiales)

Asplenium sandersonii (order Polypodiales)

Asplenium scolopendrium (order Polypodiales)

Asplenium septentrionale (order Polypodiales)

Asplenium simplicifrons (order Polypodiales)

Asplenium trichomanes (order Polypodiales)

Asplenium viride (order Polypodiales)

Asplundia rigida (order Pandanales)

Assilina exponens (orden Rotaliida)

Aster sedifolius (order Asterales)

Aster squamatus (order Asterales)

Aster novi-belgii (synonymous, order Asterales)

Asterias rubens (order Forcipulatida)

Asteriscus maritimus (order Asterales)

Asteriscus spinosus (synonymous, order Asterales)

Asterochloris mediterranea (order Microthamniales)

Asterolinon linum-stellatum (order Ericales)

Asterogyne martiana (order Arecales)

Asterophyllites equisetiformis (order Equisetales)

Astomum crispum (synonymous, order Pottiales)

Astraeus hygrometricus (order Boletales)

Astragalus armatus (order Fabales)

Astragalus atropilosulus (order Fabales)

Astragalus hamosus (order Fabales)

Astragalus hispanicus (order Fabales)

Astragalus monspessulanus (order Fabales)

Astragalus pelecinus (order Fabales)

Astragalus sesameus (order Fabales)

Astralium phoebium (order Vetigastropoda)

Astrantia minor (order Apiales)

Astrolepis integerrima (order Polypodiales)

Astrophytum myriostigma (order Caryophyllales)

Asura sagenaria (synonymous, order Lepidoptera)

Asuroides sagenaria (synonymous, order Lepidoptera)

Atemnus politus (order Pseudoscorpiones)

Athalamia spathysii (order Marchantiales)

Athallia cerinelloides (order Teloschistales)

Athene noctua (order Strigiformes)

Athyrium filix-femina (order Polypodiales)

Atractylis cancellata (order Asterales)

Atractylis gummifera (order Asterales)

Atractylis humilis (order Asterales)

Atrichum undulatum (order Polytrichales)

Atriplex glauca (orden Caryophyllales)

Atriplex halimus (orden Caryophyllales)

Atriplex portulacoides (synonymous, order Caryophyllales)

Atropa belladonna (order Solanales)

Attactagenus aff. pyriformis (order Coleoptera)

Attelabus buprestoides (synonymous, order Coleoptera)

aff Aularches miliaris (order Orthoptera)

Aularches conspersus (synonymous, order Orthoptera)

Aularches punctata (synonymous, order Orthoptera)

Aularches punctatus (synonymous, order Orthoptera)

Aularches scabiosus (synonymous, order Orthoptera)

Aularches verrucosus (synonymous, order Orthoptera)

Auricularia auricula-judae (order Auriculariales)

Auricularia mesenterica (order Auriculariales)

Auriculariopsis ampla (synonymous, order Agaricales)

Auriscalpium vulgare (order Russulales)

Austrobaileya maculata (synonymous, order Austrobaileyales)

Austrobaileya scandens (order Austrobaileyales)

Austroblechnum patersonii (order Polypodiales)

Austroblechnum penna-marina (order Polypodiales)

Austrocylindropuntia subulata (order Caryophyllales)

Austrosteenisia blackii (order Fabales)

Autographa gamma (order Lepidoptera)

Avena barbata (order Poales)

Avenella flexuosa (synonymous, order Poales)

Avenula bromoides (order Poales)

Avenula pratensis (order Poales)

Avicennia marina (order Lamiales)

Azadirachta indica (order Sapindales)

Azalea procumbens (synonymous, order Ericales)

Azolla filiculoides (order Salviniales)

Azorina vidalii (order Asterales)

Aztekium valdezii (order Caryophyllales)