| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ARSP7 | Artemisia spithamea Pursh | Artemisia campestris ssp. borealis var. borealis | Asteraceae
|
| ARST6 | Artemisia stelleriana Bess. | oldwoman | Asteraceae
|
| ARSU4 | Artemisia suksdorfii Piper | coastal wormwood | Asteraceae
|
| ARSU10 | Artemisia sulcata Rydb. | Artemisia ludoviciana ssp. sulcata | Asteraceae
|
| ARTA4 | Artemisia tacomensis Rydb. | Artemisia furcata var. furcata | Asteraceae
|
| ARTIE | Artemisia tilesii Ledeb. ssp. elatior (Torr. & Gray) Hult�n | Tilesius' wormwood | Asteraceae
|
| ARTIG | Artemisia tilesii Ledeb. ssp. gormanii (Rydb.) Hult�n | Tilesius' wormwood | Asteraceae
|
| ARTIT | Artemisia tilesii Ledeb. ssp. tilesii | Tilesius' wormwood | Asteraceae
|
| ARTIU2 | Artemisia tilesii Ledeb. ssp. unalaschcensis (Bess.) Hult�n | Tilesius' wormwood | Asteraceae
|
| ARTIA | Artemisia tilesii Ledeb. var. aleutica (Hult�n) Welsh | Artemisia vulgaris var. kamtschatica | Asteraceae
|
| ARTIE2 | Artemisia tilesii Ledeb. var. elatior Torr. & Gray | Artemisia tilesii ssp. elatior | Asteraceae
|
| ARTIU | Artemisia tilesii Ledeb. var. unalaschcensis Bess. | Artemisia tilesii ssp. unalaschcensis | Asteraceae
|
| ARTI | Artemisia tilesii Ledeb. | Tilesius' wormwood | Asteraceae
|
| ARTI4 | Artemisia tilesii auct. non Ledeb. | Artemisia tilesii ssp. unalaschcensis | Asteraceae
|
| ARTRA | Artemisia tridentata Nutt. ssp. arbuscula (Nutt.) Hall & Clements | Artemisia arbuscula ssp. arbuscula | Asteraceae
|
| ARTRB | Artemisia tridentata Nutt. ssp. bolanderi (Gray) Hall & Clements | Artemisia cana ssp. bolanderi | Asteraceae
|
| ARTRN | Artemisia tridentata Nutt. ssp. nova (A. Nels.) Hall & Clements | Artemisia nova | Asteraceae
|
| ARTRP2 | Artemisia tridentata Nutt. ssp. parishii (Gray) Hall & Clements | big sagebrush | Asteraceae
|
| ARTRR3 | Artemisia tridentata Nutt. ssp. rothrockii (Gray) Hall & Clements | Artemisia rothrockii | Asteraceae
|
| ARTRS2 | Artemisia tridentata Nutt. ssp. spiciformis (Osterhout) Kartesz & Gandhi | big sagebrush | Asteraceae
|
| ARTRT | Artemisia tridentata Nutt. ssp. tridentata | basin big sagebrush | Asteraceae
|
| ARTRT4 | Artemisia tridentata Nutt. ssp. trifida (Nutt.) Hall & Clements | Artemisia tripartita ssp. tripartita | Asteraceae
|
| ARTRV | Artemisia tridentata Nutt. ssp. vaseyana (Rydb.) Beetle | mountain big sagebrush | Asteraceae
|
| ARTRW8 | Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young | Wyoming big sagebrush | Asteraceae
|
| ARTRX | Artemisia tridentata Nutt. ssp. xericensis Winward ex R. Rosentreter & R. Kelsey | big sagebrush | Asteraceae
|
| ARTRA2 | Artemisia tridentata Nutt. var. angustifolia Gray | Artemisia tridentata ssp. tridentata | Asteraceae
|
| ARTRB2 | Artemisia tridentata Nutt. var. bolanderi (Gray) McMinn | Artemisia cana ssp. bolanderi | Asteraceae
|
| ARTRP3 | Artemisia tridentata Nutt. var. parishii (Gray) Jepson | Artemisia tridentata ssp. parishii | Asteraceae
|
| ARTRP4 | Artemisia tridentata Nutt. var. pauciflora Winward & Goodrich | Artemisia tridentata ssp. vaseyana | Asteraceae
|
| ARTRR5 | Artemisia tridentata Nutt. var. rothrockii (Gray) McMinn | Artemisia rothrockii | Asteraceae
|
| ARTRV2 | Artemisia tridentata Nutt. var. vaseyana (Rydb.) Boivin | Artemisia tridentata ssp. vaseyana | Asteraceae
|
| ARTRW | Artemisia tridentata Nutt. var. wyomingensis (Beetle & Young) Welsh | Artemisia tridentata ssp. wyomingensis | Asteraceae
|
| ARTR2 | Artemisia tridentata Nutt. | big sagebrush | Asteraceae
|
| ARTRR6 | Artemisia trifida Nutt. var. rigida Nutt. | Artemisia rigida | Asteraceae
|
| ARTR8 | Artemisia trifida Nutt. | Artemisia tripartita ssp. tripartita | Asteraceae
|
| ARTR3 | Artemisia trifurcata Steph. ex Spreng. | Artemisia furcata var. furcata | Asteraceae
|
| ARTRR2 | Artemisia tripartita Rydb. ssp. rupicola Beetle | Wyoming threetip sagebrush | Asteraceae
|
| ARTRT2 | Artemisia tripartita Rydb. ssp. tripartita | threetip sagebrush | Asteraceae
|
| ARTRR4 | Artemisia tripartita Rydb. var. rupicola (Beetle) Dorn | Artemisia tripartita ssp. rupicola | Asteraceae
|
| ARTR4 | Artemisia tripartita Rydb. | threetip sagebrush | Asteraceae
|
| ARTY | Artemisia tyrellii Rydb. | Artemisia alaskana | Asteraceae
|
| ARUM | Artemisia umbelliformis Lam. | Alps wormwood | Asteraceae
|
| ARUNA | Artemisia unalaskensis Rydb. var. aleutica Hult�n | Artemisia vulgaris var. kamtschatica | Asteraceae
|
| ARUN2 | Artemisia unalaskensis Rydb. | Artemisia vulgaris var. kamtschatica | Asteraceae
|
| ARVA2 | Artemisia vaseyana Rydb. | Artemisia tridentata ssp. vaseyana | Asteraceae
|
| ARVUL2 | Artemisia vulgaris L. ssp. ludoviciana (Nutt.) Hall & Clements | Artemisia ludoviciana ssp. ludoviciana | Asteraceae
|
| ARVUM2 | Artemisia vulgaris L. ssp. michauxiana (Bess.) St. John | Artemisia michauxiana | Asteraceae
|
| ARVUD | Artemisia vulgaris L. var. douglasiana (Bess.) St. John | Artemisia douglasiana | Asteraceae
|
| ARVUG | Artemisia vulgaris L. var. glabra Ledeb. | Artemisia vulgaris var. vulgaris | Asteraceae
|
| ARVUK | Artemisia vulgaris L. var. kamtschatica Bess. | common wormwood | Asteraceae
|
| ARVUL | Artemisia vulgaris L. var. latiloba Ledeb. | Artemisia vulgaris var. vulgaris | Asteraceae
|
| ARVUL3 | Artemisia vulgaris L. var. ludoviciana (Nutt.) Kuntze | Artemisia ludoviciana ssp. ludoviciana | Asteraceae
|
| ARVUM | Artemisia vulgaris L. var. mexicana (Willd. ex Spreng.) Torr. & Gray | Artemisia ludoviciana ssp. mexicana | Asteraceae
|
| ARVUS | Artemisia vulgaris L. var. selengensis (Turcz. ex Bess.) Maxim. | Artemisia vulgaris var. vulgaris | Asteraceae
|
| ARVUV | Artemisia vulgaris L. var. vulgaris | common wormwood | Asteraceae
|
| ARVU | Artemisia vulgaris L. | common wormwood | Asteraceae
|
| ARTEM | Artemisia L. | sagebrush | Asteraceae
|
| ARAL20 | Arthonia alba Mull. Arg. | Stirtonia alba | Arthoniaceae
|
| ARAL16 | Arthonia albofuscescens Tuck. | dot lichen | Arthoniaceae
|
| ARAL17 | Arthonia albovirescens Nyl. | dot lichen | Arthoniaceae
|
| ARAL18 | Arthonia aleuromela Nyl. | dot lichen | Arthoniaceae
|
| ARAN21 | Arthonia anjutii S. Kondr. & Alstrup | dot lichen | Arthoniaceae
|
| ARAP3 | Arthonia apetetica (A. Massal.) Th. Fr. | dot lichen | Arthoniaceae
|
| ARAR22 | Arthonia arthonioides (Ach.) A. L. Sm. | dot lichen | Arthoniaceae
|
| ARAS3 | Arthonia aspera Leighton | Arthonia arthonioides | Arthoniaceae
|
| ARAS2 | Arthonia astericus Mull. Arg. | dot lichen | Arthoniaceae
|
| ARAT10 | Arthonia atomaria (Lynge) R. Kilias | dot lichen | Arthoniaceae
|
| ARAT7 | Arthonia atrata (Fee) Mull. Arg. | dot lichen | Arthoniaceae
|
| ARBI9 | Arthonia bisepta Degel. | dot lichen | Arthoniaceae
|
| ARBY | Arthonia byssacea (Weigel) Almq. | dot lichen | Arthoniaceae
|
| ARCA35 | Arthonia caesia (Flotow) Korber | dot lichen | Arthoniaceae
|
| ARCA36 | Arthonia caribaea (Ach.) A. Massal. | Caribbean dot lichen | Arthoniaceae
|
| ARCA37 | Arthonia carneorufa Willey | dot lichen | Arthoniaceae
|
| ARCA38 | Arthonia caudata Willey | dot lichen | Arthoniaceae
|
| ARCH11 | Arthonia chiodectella Nyl. | dot lichen | Arthoniaceae
|
| ARCI4 | Arthonia cinereopruinosa Schaerer | dot lichen | Arthoniaceae
|
| ARCI7 | Arthonia cinnabarina (DC.) Wallr. | dot lichen | Arthoniaceae
|
| ARCL3 | Arthonia clemens (Tul.) Th. Fr. | dot lichen | Arthoniaceae
|
| ARCO28 | Arthonia complanata Fee | dot lichen | Arthoniaceae
|
| ARCO29 | Arthonia conferta (Fee) Nyl. | dot lichen | Arthoniaceae
|
| ARCU6 | Arthonia cupressina Tuck. | dot lichen | Arthoniaceae
|
| ARCY3 | Arthonia cytisi A. Massal. | dot lichen | Arthoniaceae
|
| ARDI17 | Arthonia didyma Korber | dot lichen | Arthoniaceae
|
| ARDI18 | Arthonia diffusa Nyl. | diffuse dot lichen | Arthoniaceae
|
| ARDI19 | Arthonia diffusella Fink | dot lichen | Arthoniaceae
|
| ARDI20 | Arthonia dispersa (Schrader) Nyl. | dispersed dot lichen | Arthoniaceae
|
| ARDI21 | Arthonia dispersula Nyl. | dot lichen | Arthoniaceae
|
| AREC | Arthonia eckfeldtii Mull. Arg. | Eckfeldt's dot lichen | Arthoniaceae
|
| AREP4 | Arthonia epimela (Almq.) Lamb | dot lichen | Arthoniaceae
|
| AREP | Arthonia epipastoides Nyl. | dot lichen | Arthoniaceae
|
| AREP3 | Arthonia epiphyscia Nyl. | dot lichen | Arthoniaceae
|
| ARER4 | Arthonia erubescens Willey | dot lichen | Arthoniaceae
|
| ARER5 | Arthonia erupta Nyl. | dot lichen | Arthoniaceae
|
| AREX2 | Arthonia excedens Nyl. | dot lichen | Arthoniaceae
|
| AREX3 | Arthonia exilis (Florke) Anzi | dot lichen | Arthoniaceae
|
| ARFI6 | Arthonia fissurina Nyl. | fissure dot lichen | Arthoniaceae
|
| ARFL5 | Arthonia floridana Willey | Florida dot lichen | Arthoniaceae
|
| ARFU5 | Arthonia fuliginosa (Schaer) Flotow | dot lichen | Arthoniaceae
|
| ARFU6 | Arthonia fusca (A. Massal.) Hepp | Arthonia lapidicola | Arthoniaceae
|
| ARGA2 | Arthonia galactitella Nyl. | galactic dot lichen | Arthoniaceae
|
| ARGL15 | Arthonia glaucescens Nyl. | dot lichen | Arthoniaceae
|