| abacarus hystrix | Yes | species | eukaryota | invertebrates | species | 644148 | click here |
| abelmoschus esculentus | Yes | species | eukaryota | plants | species | 455045 | click here |
| abies | Yes | | | plants | genus | 3319 | click here |
| abies alba | Yes | species | eukaryota | plants | species | 45372 | click here |
| abies balsamea | Yes | species | eukaryota | plants | species | 90345 | click here |
| abies concolor | Yes | species | eukaryota | plants | species | 97173 | click here |
| abies fargesii | Yes | species | eukaryota | plants | species | 97167 | click here |
| abies fraseri | Yes | species | eukaryota | plants | species | 97172 | click here |
| abies grandis | Yes | species | eukaryota | plants | species | 46611 | click here |
| abies holophylla | Yes | species | eukaryota | plants | species | 97168 | click here |
| abies lasiocarpa | Yes | species | eukaryota | plants | species | 34340 | click here |
| abies nordmanniana | Yes | species | eukaryota | plants | species | 97177 | click here |
| abies procera | Yes | species | eukaryota | plants | species | 97175 | click here |
| abies religiosa | Yes | species | eukaryota | plants | species | 425948 | click here |
| abies sibirica | Yes | species | eukaryota | plants | species | 97169 | click here |
| abrus precatorius | Yes | species | eukaryota | plants | species | 3816 | click here |
| abutilon megapotamicum | Yes | species | | | species | 1189062 | click here |
| abutilon theophrasti | Yes | species | eukaryota | plants | species | 3631 | click here |
| acacia | Yes | | | plants | genus | 3808 | click here |
| acacia acuminata | Yes | species | eukaryota | plants | species | 178749 | click here |
| acacia auriculiformis | Yes | species | eukaryota | plants | species | 205027 | click here |
| acacia crassicarpa | Yes | species | eukaryota | plants | species | 499986 | click here |
| acacia dealbata | Yes | species | eukaryota | plants | species | 205042 | click here |
| acacia hindsii | Yes | species | eukaryota | plants | species | 223432 | click here |
| acacia koa | Yes | species | eukaryota | plants | species | 468172 | click here |
| acacia mangium | Yes | species | eukaryota | plants | species | 224085 | click here |
| acacia mearnsii | Yes | species | eukaryota | plants | species | 139012 | click here |
| acacia melanoxylon | Yes | species | eukaryota | plants | species | 138028 | click here |
| acalypha diversifolia | Yes | species | eukaryota | plants | species | 681400 | click here |
| acalypha indica | Yes | species | | | species | 478095 | click here |
| acanalonia conica | Yes | species | | | species | 1585284 | click here |
| acanthaster planci | Yes | species | eukaryota | invertebrates | species | 133434 | click here |
| acanthocinus griseus | Yes | species | | | species | 1501857 | click here |
| acanthophora spicifera | Yes | species | eukaryota | plants | species | 385024 | click here |
| acanthosoma labiduroides | Yes | species | eukaryota | invertebrates | species | 483951 | click here |
| acanthus | Yes | | | plants | genus | 13326 | click here |
| acanthus ilicifolius | Yes | species | eukaryota | plants | species | 328098 | click here |
| acari | Yes | | | invertebrates | subclass | 6933 | click here |
| acca sellowiana | Yes | species | eukaryota | plants | species | 260130 | click here |
| acer | Yes | | | plants | genus | 4022 | click here |
| acer campestre | Yes | species | eukaryota | plants | species | 66205 | click here |
| acer cappadocicum | Yes | species | eukaryota | plants | species | 169053 | click here |
| acer crataegifolium | Yes | species | eukaryota | plants | species | 66208 | click here |
| acer macrophyllum | Yes | species | eukaryota | plants | species | 66211 | click here |
| acer negundo | Yes | species | eukaryota | plants | species | 4023 | click here |
| acer opalus | Yes | species | eukaryota | plants | species | 168567 | click here |
| acer palmatum | Yes | species | eukaryota | plants | species | 66201 | click here |
| acer pensylvanicum | Yes | species | eukaryota | plants | species | 66214 | click here |
| acer platanoides | Yes | species | eukaryota | plants | species | 4025 | click here |
| acer pseudoplatanus | Yes | species | eukaryota | plants | species | 4026 | click here |
| acer rubrum | Yes | species | eukaryota | plants | species | 45314 | click here |
| acer saccharum | Yes | species | eukaryota | plants | species | 4024 | click here |
| acer spicatum | Yes | species | eukaryota | plants | species | 57652 | click here |
| acer tataricum subsp. ginnala | Yes | subspecies | eukaryota | plants | subspecies | 57656 | click here |
| aceria guerreronis | Yes | species | eukaryota | invertebrates | species | 331510 | click here |
| achaea janata | Yes | species | eukaryota | invertebrates | species | 378752 | click here |
| achillea | Yes | | | plants | genus | 13328 | click here |
| achillea millefolium | Yes | species | eukaryota | plants | species | 13329 | click here |
| achillea santolina | Yes | species | | | species | 1028379 | click here |
| achnatherum eminens | Yes | species | eukaryota | plants | species | 487915 | click here |
| achnatherum inebrians | Yes | species | eukaryota | plants | species | 457187 | click here |
| achnatherum pekinense | Yes | species | | | species | 665508 | click here |
| achnatherum robustum | Yes | species | eukaryota | plants | species | 487923 | click here |
| achyranthes aspera | Yes | species | eukaryota | plants | species | 240005 | click here |
| acianthera teres | Yes | species | eukaryota | plants | species | 180092 | click here |
| aciphylla | Yes | | | plants | genus | 48023 | click here |
| aclees | Yes | | | | genus | 1738217 | click here |
| aconitum carmichaelii | Yes | species | eukaryota | plants | species | 85363 | click here |
| aconitum heterophyllum | Yes | species | eukaryota | plants | species | 279769 | click here |
| aconitum kusnezoffii | Yes | species | eukaryota | plants | species | 239685 | click here |
| aconitum vilmorinianum | Yes | species | eukaryota | plants | species | 226101 | click here |
| acorus calamus | Yes | species | eukaryota | plants | species | 4465 | click here |
| acrididae | Yes | | | invertebrates | family | 7002 | click here |
| acromantis japonica | Yes | species | | | species | 1453160 | click here |
| acromyrmex | Yes | | | invertebrates | genus | 64782 | click here |
| acromyrmex ambiguus | Yes | species | | | species | 602144 | click here |
| acromyrmex balzani | Yes | species | eukaryota | invertebrates | species | 230682 | click here |
| acromyrmex coronatus | Yes | species | eukaryota | invertebrates | species | 230683 | click here |
| acromyrmex crassispinus | Yes | species | eukaryota | invertebrates | species | 230684 | click here |
| acromyrmex echinatior | Yes | species | eukaryota | invertebrates | species | 103372 | click here |
| acromyrmex heyeri | Yes | species | eukaryota | invertebrates | species | 230685 | click here |
| acromyrmex landolti | Yes | species | eukaryota | invertebrates | species | 493205 | click here |
| acromyrmex lundi | Yes | species | eukaryota | invertebrates | species | 230687 | click here |
| acromyrmex octospinosus | Yes | species | eukaryota | invertebrates | species | 64783 | click here |
| acromyrmex striatus | Yes | species | | | species | 602190 | click here |
| acromyrmex subterraneus subterraneus | Yes | subspecies | eukaryota | invertebrates | subspecies | 230689 | click here |
| acronychia oblongifolia | Yes | species | eukaryota | plants | species | 273130 | click here |
| acropora formosa | Yes | species | eukaryota | invertebrates | species | 126732 | click here |
| acrossidius tasmaniae | Yes | species | eukaryota | invertebrates | species | 207112 | click here |
| actiniaria | Yes | | | invertebrates | order | 6103 | click here |
| actinidia | Yes | | | plants | genus | 3624 | click here |
| actinidia arguta | Yes | species | eukaryota | plants | species | 64478 | click here |
| actinidia chinensis | Yes | species | eukaryota | plants | species | 3625 | click here |
| actinidia deliciosa | Yes | species | eukaryota | plants | species | 3627 | click here |
| actinotus helianthi | Yes | species | eukaryota | plants | species | 160769 | click here |
| acyrthosiphon pisum | Yes | species | eukaryota | invertebrates | species | 7029 | click here |
| adansonia digitata | Yes | species | eukaryota | plants | species | 69109 | click here |
| adansonia gregorii | Yes | species | eukaryota | plants | species | 69110 | click here |
| adenophora capillaris | Yes | species | | | species | 1392102 | click here |
| adiantum | Yes | | | plants | genus | 13817 | click here |