| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| AVAF | Avicennia africana P. Beauv. | black mangrove | Verbenaceae
|
| AVGE | Avicennia germinans (L.) L. | black mangrove | Verbenaceae
|
| AVMAR | Avicennia marina (Forsk.) Vierh. var. resinifera (G. Forst.) Bakh. | gray mangrove | Verbenaceae
|
| AVMA3 | Avicennia marina (Forsk.) Vierh. | gray mangrove | Verbenaceae
|
| AVNI2 | Avicennia nitida Jacq. | Avicennia germinans | Verbenaceae
|
| AVICE | Avicennia L. | mangrove | Verbenaceae
|
| AXAF | Axonopus affinis Chase | Axonopus fissifolius | Poaceae
|
| AXAU | Axonopus aureus Beauv. | golden carpetgrass | Poaceae
|
| AXCO | Axonopus compressus (Sw.) Beauv. | broadleaf carpetgrass | Poaceae
|
| AXFI | Axonopus fissifolius (Raddi) Kuhlm. | common carpetgrass | Poaceae
|
| AXFU | Axonopus furcatus (Fluegg�) A.S. Hitchc. | big carpetgrass | Poaceae
|
| AXPU | Axonopus purpusii (Mez) Chase | Purpus' carpetgrass | Poaceae
|
| AXSC | Axonopus scoparius (Fluegge) Hitchc. | carpetgrass | Poaceae
|
| AXONO | Axonopus Beauv. | carpetgrass | Poaceae
|
| AXAM | Axyris amaranthoides L. | Russian pigweed | Chenopodiaceae
|
| AXYRI | Axyris L. | Russian pigweed | Chenopodiaceae
|
| AYTR | Ayapana triplinervis (Vahl) King & H.E. Robins. | Eupatorium triplinerve | Asteraceae
|
| AYBR | Aydendron bracteatum Nees | Aniba bracteata | Lauraceae
|
| AYAR | Ayenia ardua Cristobal | wingstem ayenia | Sterculiaceae
|
| AYCA2 | Ayenia californica Jepson | Ayenia compacta | Sterculiaceae
|
| AYCO | Ayenia compacta Rose | California ayenia | Sterculiaceae
|
| AYEU | Ayenia euphrasiifolia Griseb. | eyebright ayenia | Sterculiaceae
|
| AYFI | Ayenia filiformis S. Wats. | TransPecos ayenia | Sterculiaceae
|
| AYGL | Ayenia glabra S. Wats. | smooth ayenia | Sterculiaceae
|
| AYIN2 | Ayenia insulicola Cristobal | dwarf ayenia | Sterculiaceae
|
| AYLI | Ayenia limitaris Cristobal | Rio Grande ayenia | Sterculiaceae
|
| AYMI | Ayenia microphylla Gray | dense ayenia | Sterculiaceae
|
| AYPI | Ayenia pilosa Cristobal | hairy ayenia | Sterculiaceae
|
| AYPU2 | Ayenia pusilla auct. non L. | Ayenia insulicola | Sterculiaceae
|
| AYENI | Ayenia L. | ayenia | Sterculiaceae
|
| AZIN2 | Azadirachta indica Adr. Juss. | neem | Meliaceae
|
| AZADI2 | Azadirachta Adr. Juss. | azadirachta | Meliaceae
|
| AZAL | Azalea alabamensis (Rehd.) Small | Rhododendron alabamense | Ericaceae
|
| AZAR | Azalea arborescens Pursh | Rhododendron arborescens | Ericaceae
|
| AZAT | Azalea atlantica Ashe | Rhododendron atlanticum | Ericaceae
|
| AZAU | Azalea austrina Small | Rhododendron austrinum | Ericaceae
|
| AZCA2 | Azalea calendulacea Michx. | Rhododendron calendulaceum | Ericaceae
|
| AZCA5 | Azalea canadensis (L.) Kuntze | Rhododendron canadense | Ericaceae
|
| AZCA4 | Azalea candida Small | Rhododendron canescens | Ericaceae
|
| AZCAS | Azalea canescens Michx. var. subglabra (Rehd.) Small | Rhododendron canescens | Ericaceae
|
| AZCA3 | Azalea canescens Michx. | Rhododendron canescens | Ericaceae
|
| AZJA | Azalea japonica Gray | Rhododendron japonicum | Ericaceae
|
| AZLU | Azalea lutea auct. non L. | Rhododendron calendulaceum | Ericaceae
|
| AZNU | Azalea nudiflora L. | Rhododendron periclymenoides | Ericaceae
|
| AZOC | Azalea occidentalis Torr. & Gray ex Torr. | Rhododendron occidentale var. occidentale | Ericaceae
|
| AZPR3 | Azalea prinophylla Small | Rhododendron prinophyllum | Ericaceae
|
| AZPR | Azalea procumbens L. | Loiseleuria procumbens | Ericaceae
|
| AZPR2 | Azalea prunifolia Small | Rhododendron prunifolium | Ericaceae
|
| AZSE | Azalea serrulata Small | Rhododendron viscosum | Ericaceae
|
| AZSP | Azalea speciosa Willd. | Rhododendron flammeum | Ericaceae
|
| AZVI | Azalea viscosa L. | Rhododendron viscosum | Ericaceae
|
| AZALW | Azaleastrum albiflorum (Hook.) Rydb. ssp. warrenii (A. Nels.) W.A. Weber | Rhododendron albiflorum var. warrenii | Ericaceae
|
| AZAL2 | Azaleastrum albiflorum (Hook.) Rydb. | Rhododendron albiflorum var. albiflorum | Ericaceae
|
| AZCA | Azolla caroliniana Willd. | Carolina mosquitofern | Azollaceae
|
| AZFI | Azolla filiculoides Lam. | Pacific mosquitofern | Azollaceae
|
| AZME | Azolla mexicana Schlecht. & Cham. ex K. Presl | Mexican mosquitofern | Azollaceae
|
| AZPI | Azolla pinnata R. Br. | feathered mosquitofern | Azollaceae
|
| AZOLL | Azolla Lam. | mosquitofern | Azollaceae
|
| BAMO4 | Baccaurea motleyana (Muell. Arg.) Muell. Arg. | rambai | Euphorbiaceae
|
| BARA3 | Baccaurea racemosa (Reinw.) Muell. Arg. | menteng | Euphorbiaceae
|
| BARA4 | Baccaurea ramiflora Lour. | baccaurea | Euphorbiaceae
|
| BASA8 | Baccaurea sapida (Roxb.) Muell. Arg. | Baccaurea ramiflora | Euphorbiaceae
|
| BACCA | Baccaurea Lour. | baccaurea | Euphorbiaceae
|
| BAAN | Baccharis angustifolia Michx. | saltwater false willow | Asteraceae
|
| BABI | Baccharis bigelovii Gray | Bigelow's false willow | Asteraceae
|
| BABR | Baccharis brachyphylla Gray | shortleaf baccharis | Asteraceae
|
| BADI3 | Baccharis dioica Vahl | broombush false willow | Asteraceae
|
| BADO | Baccharis douglasii DC. | saltmarsh baccharis | Asteraceae
|
| BAEM | Baccharis emoryi Gray | Emory's baccharis | Asteraceae
|
| BAGL | Baccharis glomeruliflora Pers. | silverling | Asteraceae
|
| BAGL2 | Baccharis glutinosa Pers. | Baccharis salicifolia | Asteraceae
|
| BAHAA | Baccharis halimifolia L. var. angustior DC. | Baccharis halimifolia | Asteraceae
|
| BAHA | Baccharis halimifolia L. | eastern baccharis | Asteraceae
|
| BAHA2 | Baccharis havardii Gray | Havard's false willow | Asteraceae
|
| BAMA13 | Baccharis malibuensis Beauchamp & Henderson | Malibu baccharis | Asteraceae
|
| BAMY | Baccharis myrsinites (Lam.) Pers. | Santo Domingo false willow | Asteraceae
|
| BANE2 | Baccharis neglecta Britt. | Rooseveltweed | Asteraceae
|
| BAPIC | Baccharis pilularis DC. ssp. consanguinea (DC.) C.B. Wolf | Baccharis pilularis | Asteraceae
|
| BAPIC2 | Baccharis pilularis DC. var. consanguinea (DC.) Kuntze | Baccharis pilularis | Asteraceae
|
| BAPI | Baccharis pilularis DC. | coyotebrush | Asteraceae
|
| BAPLG | Baccharis plummerae Gray ssp. glabrata Hoover | smooth baccharis | Asteraceae
|
| BAPLP | Baccharis plummerae Gray ssp. plummerae | Plummer's baccharis | Asteraceae
|
| BAPL | Baccharis plummerae Gray | Plummer's baccharis | Asteraceae
|
| BAPT | Baccharis pteronioides DC. | yerba de pasmo | Asteraceae
|
| BASA4 | Baccharis salicifolia (Ruiz & Pav�n) Pers. | mule's fat | Asteraceae
|
| BASA | Baccharis salicina Torr. & Gray | Great Plains false willow | Asteraceae
|
| BASA2 | Baccharis sarothroides Gray | desertbroom | Asteraceae
|
| BASE | Baccharis sergiloides Gray | desert baccharis | Asteraceae
|
| BATE | Baccharis texana (Torr. & Gray) Gray | prairie false willow | Asteraceae
|
| BATH | Baccharis thesioides Kunth | Arizona baccharis | Asteraceae
|
| BAVA3 | Baccharis vanessae Beauchamp | Encinitis false willow | Asteraceae
|
| BAVI | Baccharis viminea DC. | Baccharis salicifolia | Asteraceae
|
| BAWR | Baccharis wrightii Gray | Wright's baccharis | Asteraceae
|
| BACCH | Baccharis L. | baccharis | Asteraceae
|
| BAUN5 | Bachmanniomyces uncialicola (Zopf) D. Hawksw. | | Uncertain Lichen Family
|
| BACHM | Bachmanniomyces D. Hawksw. | bachmanniomyces | Uncertain Lichen Family
|
| BAAB3 | Bacidia abbrevians (Nyl.) Th. Fr. | Bacidia igniarii | Bacidiaceae
|
| BAAB4 | Bacidia abductans (Nyl.) Zahlbr. | Bacidia schweinitzii | Bacidiaceae
|
| BAAB5 | Bacidia absistens (Nyl.) Arnold | dotted lichen | Bacidiaceae
|
| BAAC3 | Bacidia accedens (Arnold) Lettau | Bacidia sabuletorum | Bacidiaceae
|
| BAAC4 | Bacidia acclinis (Flotow) Zahlbr. | Arthrosporum populorum | Catillariaceae
|