| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ARSC3 | Aristida schiedeana Trin. & Rupr. | single threeawn | Poaceae
|
| ARSI3 | Aristida simpliciflora Chapman | southern threeawn | Poaceae
|
| ARSP3 | Aristida spiciformis Ell. | bottlebrush threeawn | Poaceae
|
| ARSTN | Aristida stricta Michx. var. nealleyi Vasey | Aristida purpurea var. nealleyi | Poaceae
|
| ARST5 | Aristida stricta Michx. | pineland threeawn | Poaceae
|
| ARSU6 | Aristida suringarii Henr. | St. Eustatius threeawn | Poaceae
|
| ARSW | Aristida swartziana Steud. | Swartz's threeawn | Poaceae
|
| ARTE2 | Aristida tenuispica A.S. Hitchc. | Aristida purpurascens var. tenuispica | Poaceae
|
| ARTEG | Aristida ternipes Cav. var. gentilis (Henr.) Allred | spidergrass | Poaceae
|
| ARTEH | Aristida ternipes Cav. var. hamulosa (Henr.) Trent | Aristida ternipes var. gentilis | Poaceae
|
| ARTEM2 | Aristida ternipes Cav. var. minor (Vasey) A.S. Hitchc. | Aristida ternipes var. gentilis | Poaceae
|
| ARTET | Aristida ternipes Cav. var. ternipes | spidergrass | Poaceae
|
| ARTE3 | Aristida ternipes Cav. | spidergrass | Poaceae
|
| ARTU | Aristida tuberculosa Nutt. | seaside threeawn | Poaceae
|
| ARVI5 | Aristida virgata Trin. | Aristida purpurascens var. virgata | Poaceae
|
| ARWRP | Aristida wrightii Nash var. parishii (A.S. Hitchc.) Gould | Aristida purpurea var. parishii | Poaceae
|
| ARWR | Aristida wrightii Nash | Aristida purpurea var. wrightii | Poaceae
|
| ARIST | Aristida L. | threeawn | Poaceae
|
| ARIN12 | Aristocapsa insignis (Curran) Reveal & Hardham | Indian Valley spinycape | Polygonaceae
|
| ARIST4 | Aristocapsa Reveal & Hardham | spinycape | Polygonaceae
|
| ARES2 | Aristoclesia esculenta (Arruda) Stuntz | Platonia esculenta | Clusiaceae
|
| ARAN6 | Aristolochia anguicida Jacq. | harlequin dutchman's pipe | Aristolochiaceae
|
| ARBI4 | Aristolochia bilabiata L. | West Indian dutchman's pipe | Aristolochiaceae
|
| ARBI5 | Aristolochia bilobata L. | twolobe dutchman's pipe | Aristolochiaceae
|
| ARBRA2 | Aristolochia brevipes Benth. var. acuminata S. Wats. | Aristolochia coryi | Aristolochiaceae
|
| ARBR9 | Aristolochia brevipes auct. non Benth. | Aristolochia coryi | Aristolochiaceae
|
| ARCA10 | Aristolochia californica Torr. | California dutchman's pipe | Aristolochiaceae
|
| ARCL | Aristolochia clematitis L. | birthwort | Aristolochiaceae
|
| ARCO20 | Aristolochia convolvulacea Small | Aristolochia serpentaria | Aristolochiaceae
|
| ARCO8 | Aristolochia coryi I.M. Johnston | Cory's dutchman's pipe | Aristolochiaceae
|
| ARDU2 | Aristolochia durior Hill | Aristolochia macrophylla | Aristolochiaceae
|
| AREL10 | Aristolochia elegans Mast. | elegant dutchman's pipe | Aristolochiaceae
|
| ARER | Aristolochia erecta L. | swanflower | Aristolochiaceae
|
| ARGR2 | Aristolochia grandiflora Sw. | pelicanflower | Aristolochiaceae
|
| ARHA4 | Aristolochia hastata Nutt. | Aristolochia serpentaria | Aristolochiaceae
|
| ARLA24 | Aristolochia labiata Willd. | mottled dutchman's pipe | Aristolochiaceae
|
| ARLI5 | Aristolochia littoralis Parodi | elegant dutchman's pipe | Aristolochiaceae
|
| ARLO10 | Aristolochia longiflora Engelm. & Gray | Aristolochia erecta | Aristolochiaceae
|
| ARMA7 | Aristolochia macrophylla Lam. | pipevine | Aristolochiaceae
|
| ARMA8 | Aristolochia marshii Standl. | Aristolochia pentandra | Aristolochiaceae
|
| ARMA9 | Aristolochia maxima Jacq. | Florida dutchman's pipe | Aristolochiaceae
|
| ARNA2 | Aristolochia nashii Kearney | Aristolochia serpentaria | Aristolochiaceae
|
| AROB5 | Aristolochia oblongata Jacq. | Aristolochia bilabiata | Aristolochiaceae
|
| AROD | Aristolochia odoratissima L. | fragrant dutchman's pipe | Aristolochiaceae
|
| ARPE7 | Aristolochia peltata L. | peltate dutchman's pipe | Aristolochiaceae
|
| ARPE8 | Aristolochia pentandra Jacq. | Marsh's dutchman's pipe | Aristolochiaceae
|
| ARPO10 | Aristolochia porphyrophylla H. Pfeifer | Aristolochia watsonii | Aristolochiaceae
|
| ARRE3 | Aristolochia reticulata Jacq. | Texas dutchman's pipe | Aristolochiaceae
|
| ARRI3 | Aristolochia ringens Vahl | gaping dutchman's pipe | Aristolochiaceae
|
| ARSEH | Aristolochia serpentaria L. var. hastata (Nutt.) Duchartre | Aristolochia serpentaria | Aristolochiaceae
|
| ARSEN | Aristolochia serpentaria L. var. nashii (Kearney) Ahles | Aristolochia serpentaria | Aristolochiaceae
|
| ARSE3 | Aristolochia serpentaria L. | Virginia snakeroot | Aristolochiaceae
|
| ARTO3 | Aristolochia tomentosa Sims | woolly dutchman's pipe | Aristolochiaceae
|
| ARTR5 | Aristolochia trilobata L. | bejuco de santiago | Aristolochiaceae
|
| ARWA | Aristolochia watsonii Woot. & Standl. | Watson's dutchman's pipe | Aristolochiaceae
|
| ARWR2 | Aristolochia wrightii Seem. | Wright's dutchman's pipe | Aristolochiaceae
|
| ARIST2 | Aristolochia L. | dutchman's pipe | Aristolochiaceae
|
| ARVU5 | Armeniaca vulgaris Lam. | Prunus armeniaca | Rosaceae
|
| ARARC2 | Armeria arctica (Cham.) Wallr. ssp. californica (Boiss.) Abrams | Armeria maritima ssp. californica | Plumbaginaceae
|
| ARAR12 | Armeria arctica (Cham.) Wallr. | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARLAS2 | Armeria labradorica Wallr. var. submutica (Blake) H.F. Lewis | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARLA20 | Armeria labradorica Wallr. | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMAA3 | Armeria maritima (P. Mill.) Willd. ssp. arctica (Cham.) Hult�n | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMAC2 | Armeria maritima (P. Mill.) Willd. ssp. californica (Boiss.) Porsild | California seapink | Plumbaginaceae
|
| ARMAL2 | Armeria maritima (P. Mill.) Willd. ssp. labradorica (Wallr.) Hult�n | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMAP3 | Armeria maritima (P. Mill.) Willd. ssp. purpurea (W.D.J. Koch) A.& D. L�ve | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMAS | Armeria maritima (P. Mill.) Willd. ssp. sibirica (Turcz. ex Boiss.) Nyman | Siberian sea thrift | Plumbaginaceae
|
| ARMAC | Armeria maritima (P. Mill.) Willd. var. californica (Boiss.) G.H.M. Lawrence | Armeria maritima ssp. californica | Plumbaginaceae
|
| ARMAL3 | Armeria maritima (P. Mill.) Willd. var. labradorica (Wallr.) G.H.M. Lawrence | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMAP2 | Armeria maritima (P. Mill.) Willd. var. purpurea (W.D.J. Koch) G.H.M. Lawrence | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMAS2 | Armeria maritima (P. Mill.) Willd. var. sibirica (Turcz. ex Boiss.) G.H.M. Lawrence | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMA6 | Armeria maritima (P. Mill.) Willd. | thrift seapink | Plumbaginaceae
|
| ARSCS | Armeria scabra Pallas ssp. sibirica (Turcz. ex Boiss.) Hyl. | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARVU3 | Armeria vulgaris Willd. p.p. | Armeria maritima ssp. sibirica | Plumbaginaceae
|
| ARMER | Armeria (DC.) Willd. | armeria | Plumbaginaceae
|
| ARAQ | Armoracia aquatica (Eat.) Wieg. | Neobeckia aquatica | Brassicaceae
|
| ARAR16 | Armoracia armoracia (L.) Britt. | Armoracia rusticana | Brassicaceae
|
| ARLA22 | Armoracia lacustris (Gray) Al-Shehbaz & Bates | Neobeckia aquatica | Brassicaceae
|
| ARLA23 | Armoracia lapathifolia Gilib. | Armoracia rusticana | Brassicaceae
|
| ARRU4 | Armoracia rusticana P.G. Gaertn., B. Mey. & Scherb. | horseradish | Brassicaceae
|
| ARMOR | Armoracia P.G. Gaertn., B. Mey. & Scherb. | armoracia | Brassicaceae
|
| ARFE8 | Arnellia fennica (Gottsche) Lindb. | | Arnelliaceae
|
| ARNEL | Arnellia Lindb. | | Arnelliaceae
|
| ARAC3 | Arnica acaulis (Walt.) B.S.P. | common leopardbane | Asteraceae
|
| ARALA4 | Arnica alpina (L.) Olin ssp. angustifolia (Vahl) Maguire | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALA5 | Arnica alpina (L.) Olin ssp. attenuata (Greene) Maguire | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALL3 | Arnica alpina (L.) Olin ssp. lonchophylla (Greene) Taylor & MacBryde | Arnica lonchophylla ssp. lonchophylla | Asteraceae
|
| ARALS | Arnica alpina (L.) Olin ssp. sornborgeri (Fern.) Maguire | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALT3 | Arnica alpina (L.) Olin ssp. tomentosa (Macoun) Maguire | Arnica angustifolia ssp. tomentosa | Asteraceae
|
| ARALA6 | Arnica alpina (L.) Olin var. angustifolia (Vahl) Fern. | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALA | Arnica alpina (L.) Olin var. attenuata (Greene) Ediger & Barkl. | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALL | Arnica alpina (L.) Olin var. linearis Hult�n | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALL2 | Arnica alpina (L.) Olin var. lonchophylla (Greene) Welsh | Arnica lonchophylla ssp. lonchophylla | Asteraceae
|
| ARALP | Arnica alpina (L.) Olin var. plantaginea (Pursh) Ediger & Barkl. | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALT2 | Arnica alpina (L.) Olin var. tomentosa (Macoun) Cronq. | Arnica angustifolia ssp. tomentosa | Asteraceae
|
| ARALU | Arnica alpina (L.) Olin var. ungavensis Boivin | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARALV | Arnica alpina (L.) Olin var. vestita Hult�n | Arnica angustifolia ssp. angustifolia | Asteraceae
|
| ARAMG | Arnica amplexicaulis Nutt. ssp. genuina Maguire | Arnica amplexicaulis | Asteraceae
|
| ARAMP | Arnica amplexicaulis Nutt. ssp. prima (Maguire) Maguire | Arnica amplexicaulis | Asteraceae
|
| ARAMP2 | Arnica amplexicaulis Nutt. var. piperi St. John & Warren | Arnica amplexicaulis | Asteraceae
|
| ARAMP3 | Arnica amplexicaulis Nutt. var. prima (Maguire) Boivin | Arnica amplexicaulis | Asteraceae
|