| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ARPUP7 | Arctostaphylos pungens Kunth ssp. parryana (Lemmon) J.B. Roof | Arctostaphylos parryana ssp. parryana | Ericaceae
|
| ARPUR2 | Arctostaphylos pungens Kunth ssp. roofii (Gankin) J.B. Roof | Arctostaphylos manzanita ssp. roofii | Ericaceae
|
| ARPUM2 | Arctostaphylos pungens Kunth var. montana (Eastw.) Munz | Arctostaphylos hookeri ssp. montana | Ericaceae
|
| ARPUR | Arctostaphylos pungens Kunth var. ravenii (P.V. Wells) J.B. Roof | Arctostaphylos hookeri ssp. ravenii | Ericaceae
|
| ARPU5 | Arctostaphylos pungens Kunth | pointleaf manzanita | Ericaceae
|
| ARPU10 | Arctostaphylos purissima P.V. Wells | La Purissima manzanita | Ericaceae
|
| ARRA7 | Arctostaphylos rainbowensis J.E. Keeley & A. Massihi | Rainbow manzanita | Ericaceae
|
| ARRE5 | Arctostaphylos refugioensis Gankin | Refugio manzanita | Ericaceae
|
| ARRE7 | Arctostaphylos regismontana Eastw. | Kings Mountain manzanita | Ericaceae
|
| ARRE8 | Arctostaphylos �repens (J.T. Howell) P.V. Wells | PMC manzanita | Ericaceae
|
| ARRO6 | Arctostaphylos roofii Gankin | Arctostaphylos manzanita ssp. roofii | Ericaceae
|
| ARRO9 | Arctostaphylos rosei Eastw. | Arctostaphylos tomentosa ssp. rosei | Ericaceae
|
| ARRU | Arctostaphylos rubra (Rehd. & Wilson) Fern. | red fruit bearberry | Ericaceae
|
| ARRU2 | Arctostaphylos rudis Jepson & Wies. ex Jepson | shagbark manzanita | Ericaceae
|
| ARSE11 | Arctostaphylos sensitiva Jepson | Arctostaphylos nummularia | Ericaceae
|
| ARSE12 | Arctostaphylos serpentinicola J.B. Roof | Arctostaphylos viscida ssp. pulchella | Ericaceae
|
| ARSI | Arctostaphylos silvicola Jepson & Wies. ex Jepson | Bonny Doon manzanita | Ericaceae
|
| ARSO5 | Arctostaphylos sonomensis Eastw. | Arctostaphylos canescens ssp. sonomensis | Ericaceae
|
| ARSTB | Arctostaphylos stanfordiana Parry ssp. bakeri (Eastw.) J.E. Adams | Arctostaphylos bakeri ssp. bakeri | Ericaceae
|
| ARSTD4 | Arctostaphylos stanfordiana Parry ssp. decumbens (P.V. Wells) P.V. Wells | Rincon manzanita | Ericaceae
|
| ARSTH | Arctostaphylos stanfordiana Parry ssp. hispidula (T.J. Howell) J.E. Adams | Arctostaphylos hispidula | Ericaceae
|
| ARSTR | Arctostaphylos stanfordiana Parry ssp. raichei W. Knight | Raiche's manzanita | Ericaceae
|
| ARSTS | Arctostaphylos stanfordiana Parry ssp. stanfordiana | Stanford's manzanita | Ericaceae
|
| ARSTR2 | Arctostaphylos stanfordiana Parry var. repens J.B. Roof | Arctostaphylos stanfordiana ssp. stanfordiana | Ericaceae
|
| ARST | Arctostaphylos stanfordiana Parry | Stanford's manzanita | Ericaceae
|
| ARST10 | Arctostaphylos strigosa T.J. Howell | Arctostaphylos cinerea | Ericaceae
|
| ARSUC | Arctostaphylos subcordata Eastw. var. confertiflora (Eastw.) Munz | Arctostaphylos confertiflora | Ericaceae
|
| ARSU9 | Arctostaphylos subcordata Eastw. | Arctostaphylos tomentosa ssp. subcordata | Ericaceae
|
| ARTOB | Arctostaphylos tomentosa (Pursh) Lindl. ssp. bracteosa (DC.) J.E. Adams | woollyleaf manzanita | Ericaceae
|
| ARTOC2 | Arctostaphylos tomentosa (Pursh) Lindl. ssp. crinita (J.E. Adams ex McMinn) Gankin | woollyleaf manzanita | Ericaceae
|
| ARTOC3 | Arctostaphylos tomentosa (Pursh) Lindl. ssp. crustacea (Eastw.) P.V. Wells | brittleleaf manzanita | Ericaceae
|
| ARTOD2 | Arctostaphylos tomentosa (Pursh) Lindl. ssp. daciticola P.V. Wells | dacite manzanita | Ericaceae
|
| ARTOE | Arctostaphylos tomentosa (Pursh) Lindl. ssp. eastwoodiana P.V. Wells | woollyleaf manzanita | Ericaceae
|
| ARTOI | Arctostaphylos tomentosa (Pursh) Lindl. ssp. insulicola P.V. Wells | woollyleaf manzanita | Ericaceae
|
| ARTOR | Arctostaphylos tomentosa (Pursh) Lindl. ssp. rosei (Eastw.) P.V. Wells | rosy manzanita | Ericaceae
|
| ARTOS | Arctostaphylos tomentosa (Pursh) Lindl. ssp. subcordata (Eastw.) P.V. Wells | Santa Cruz Island manzanita | Ericaceae
|
| ARTOT3 | Arctostaphylos tomentosa (Pursh) Lindl. ssp. tomentosa | woollyleaf manzanita | Ericaceae
|
| ARTOH | Arctostaphylos tomentosa (Pursh) Lindl. var. hebeclada (DC.) J.E. Adams | Arctostaphylos tomentosa ssp. bracteosa | Ericaceae
|
| ARTOT | Arctostaphylos tomentosa (Pursh) Lindl. var. tomentosiformis (J.E. Adams) Munz | Arctostaphylos tomentosa ssp. crinita | Ericaceae
|
| ARTOT2 | Arctostaphylos tomentosa (Pursh) Lindl. var. trichoclada (DC.) Munz | Arctostaphylos tomentosa ssp. bracteosa | Ericaceae
|
| ARTO2 | Arctostaphylos tomentosa (Pursh) Lindl. | woollyleaf manzanita | Ericaceae
|
| ARTR9 | Arctostaphylos tracyi (Eastw.) J.E. Adams ex McMinn | Arctostaphylos columbiana | Ericaceae
|
| ARTR7 | Arctostaphylos truei W. Knight | Arctostaphylos mewukka ssp. truei | Ericaceae
|
| ARUVA2 | Arctostaphylos uva-ursi (L.) Spreng. ssp. adenotricha (Fern. & J.F. Macbr.) Calder & Taylor | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVC3 | Arctostaphylos uva-ursi (L.) Spreng. ssp. coactilis (Fern. & J.F. Macbr.) A.& D. L�ve & Kapoor | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVC2 | Arctostaphylos uva-ursi (L.) Spreng. ssp. coloradensis (Rollins) J.B. Roof | Arctostaphylos coloradensis | Ericaceae
|
| ARUVE | Arctostaphylos uva-ursi (L.) Spreng. ssp. emundsii (J.T. Howell) J.B. Roof | Arctostaphylos edmundsii | Ericaceae
|
| ARUVL | Arctostaphylos uva-ursi (L.) Spreng. ssp. longipilosa Packer & Denford | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVM3 | Arctostaphylos uva-ursi (L.) Spreng. ssp. monoensis J.B. Roof | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVM | Arctostaphylos uva-ursi (L.) Spreng. ssp. myrtifolia (Parry) J.B. Roof | Arctostaphylos myrtifolia | Ericaceae
|
| ARUVS | Arctostaphylos uva-ursi (L.) Spreng. ssp. sensitiva (Jepson) J.B. Roof | Arctostaphylos nummularia | Ericaceae
|
| ARUVS2 | Arctostaphylos uva-ursi (L.) Spreng. ssp. stipitata Packer & Denford | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVA | Arctostaphylos uva-ursi (L.) Spreng. var. adenotricha Fern. & J.F. Macbr. | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVC | Arctostaphylos uva-ursi (L.) Spreng. var. coactilis Fern. & J.F. Macbr. | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVH | Arctostaphylos uva-ursi (L.) Spreng. var. hearstiorum (Hoover & J.B. Roof) J.B. Roof | Arctostaphylos hookeri ssp. hearstiorum | Ericaceae
|
| ARUVL2 | Arctostaphylos uva-ursi (L.) Spreng. var. leobreweri J.B. Roof | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVM2 | Arctostaphylos uva-ursi (L.) Spreng. var. marinensis J.B. Roof | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVP | Arctostaphylos uva-ursi (L.) Spreng. var. pacifica Hult�n | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVP2 | Arctostaphylos uva-ursi (L.) Spreng. var. parvifolia (J.B. Roof) J.B. Roof | Arctostaphylos edmundsii | Ericaceae
|
| ARUVS3 | Arctostaphylos uva-ursi (L.) Spreng. var. saxicola J.B. Roof | Arctostaphylos pacifica | Ericaceae
|
| ARUVS4 | Arctostaphylos uva-ursi (L.) Spreng. var. stipitata (Packer & Denford) Dorn | Arctostaphylos uva-ursi | Ericaceae
|
| ARUVS5 | Arctostaphylos uva-ursi (L.) Spreng. var. suborbiculata W. Knight | Arctostaphylos uva-ursi | Ericaceae
|
| ARUV | Arctostaphylos uva-ursi (L.) Spreng. | kinnikinnick | Ericaceae
|
| ARVI3 | Arctostaphylos virgata Eastw. | Bolinas manzanita | Ericaceae
|
| ARVI7 | Arctostaphylos viridissima (Eastw.) McMinn | whitehair manzanita | Ericaceae
|
| ARVIM | Arctostaphylos viscida Parry ssp. mariposa (Dudley) P.V. Wells | Mariposa manzanita | Ericaceae
|
| ARVIP2 | Arctostaphylos viscida Parry ssp. pulchella (T.J. Howell) P.V. Wells | sticky whiteleaf manzanita | Ericaceae
|
| ARVIV | Arctostaphylos viscida Parry ssp. viscida | sticky whiteleaf manzanita | Ericaceae
|
| ARVI4 | Arctostaphylos viscida Parry | sticky whiteleaf manzanita | Ericaceae
|
| ARWE | Arctostaphylos wellsii Knight | Wells' manzanita | Ericaceae
|
| ARCTO3 | Arctostaphylos Adans. | manzanita | Ericaceae
|
| ARCA45 | Arctotheca calendula (L.) Levyns | capeweed | Asteraceae
|
| ARCTO11 | Arctotheca J.C. Wendl. | capeweed | Asteraceae
|
| ARGR10 | Arctotis grandis Thunb. | Arctotis stoechadifolia | Asteraceae
|
| ARSTG | Arctotis stoechadifolia Berg. var. grandis (Thunb.) Less. | Arctotis stoechadifolia | Asteraceae
|
| ARST2 | Arctotis stoechadifolia Berg. | African daisy | Asteraceae
|
| ARCTO4 | Arctotis L. | arctotis | Asteraceae
|
| ARAL13 | Arctous alpina (L.) Niedenzu | Arctostaphylos alpina | Ericaceae
|
| ARER3 | Arctous erythrocarpa Small | Arctostaphylos rubra | Ericaceae
|
| ARRU6 | Arctous rubra (Rehd. & Wilson) Nakai | Arctostaphylos rubra | Ericaceae
|
| ARDI13 | Arcyphyllum difforme Ell. | Rhynchosia difformis | Fabaceae
|
| ARCR80 | Ardisia crenata Sims | hen's eyes | Myrsinaceae
|
| ARCR9 | Ardisia crenulata Vent. | Parathesis crenulata | Myrsinaceae
|
| AREL4 | Ardisia elliptica Thunb. | shoebutton | Myrsinaceae
|
| ARES | Ardisia escallonoides Schiede & Deppe ex Schlecht. & Cham. | island marlberry | Myrsinaceae
|
| ARGL11 | Ardisia glauciflora Urban | ausubon | Myrsinaceae
|
| ARLU3 | Ardisia luquillensis (Britt.) Alain | mountain marlberry | Myrsinaceae
|
| AROB2 | Ardisia obovata Desv. ex Hamilton | Guadeloupe marlberry | Myrsinaceae
|
| ARPO6 | Ardisia polycephala auct. non Wallich ex A. DC. | Ardisia elliptica | Myrsinaceae
|
| ARSO | Ardisia solanacea Roxb. | | Myrsinaceae
|
| ARDIS | Ardisia Sw. | marlberry | Myrsinaceae
|
| ARCA41 | Areca catechu L. | betel palm | Arecaceae
|
| ARCA42 | Areca cathecu L. | Areca catechu | Arecaceae
|
| ARECA | Areca L. | areca palm | Arecaceae
|
| ARRO10 | Arecastrum romanzoffianum (Cham.) Becc. | queen palm | Arecaceae
|
| ARECA2 | Arecastrum (Drude) Becc. | arecastrum palm | Arecaceae
|
| ARAB | Arenaria aberrans M.E. Jones | Mt. Dellenbaugh sandwort | Caryophyllaceae
|
| ARACU | Arenaria aculeata S. Wats. var. uintahensis (A. Nels.) M.E. Peck | Arenaria kingii ssp. uintahensis | Caryophyllaceae
|
| ARAC2 | Arenaria aculeata S. Wats. | prickly sandwort | Caryophyllaceae
|
| ARAL11 | Arenaria alabamensis McCormick, Bozeman & Spongberg | Minuartia uniflora | Caryophyllaceae
|
| ARAR20 | Arenaria arctica Stev. ex Ser. | Minuartia arctica | Caryophyllaceae
|