| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ACPA13 | Achnatherum parishii (Vasey) Barkworth | Parish's needlegrass | Poaceae
|
| ACPE13 | Achnatherum perplexum Hoge & Barkworth | New Mexico needlegrass | Poaceae
|
| ACPI2 | Achnatherum pinetorum (M.E. Jones) Barkworth | pine needlegrass | Poaceae
|
| ACRI8 | Achnatherum richardsonii (Link) Barkworth | Richardson's needlegrass | Poaceae
|
| ACRO7 | Achnatherum robustum (Vasey) Barkworth | sleepygrass | Poaceae
|
| ACSC11 | Achnatherum scribneri (Vasey) Barkworth | Scribner needlegrass | Poaceae
|
| ACSP12 | Achnatherum speciosum (Trin. & Rupr.) Barkworth | desert needlegrass | Poaceae
|
| ACSP8 | Achnatherum splendens (Trin.) Nevski | | Poaceae
|
| ACST7 | Achnatherum stillmanii (Bolander) Barkworth | Stillman's needlegrass | Poaceae
|
| ACSW3 | Achnatherum swallenii (C.L. Hitchc. & Spellenberg) Barkworth | Swallen's needlegrass | Poaceae
|
| ACTH7 | Achnatherum thurberianum (Piper) Barkworth | Thurber's needlegrass | Poaceae
|
| ACWA4 | Achnatherum wallowaensis Maze & K.A. Robson | Wallowa needlegrass | Poaceae
|
| ACWE3 | Achnatherum webberi (Thurb.) Barkworth | Webber needlegrass | Poaceae
|
| ACHNA | Achnatherum Beauv. | needlegrass | Poaceae
|
| ACCA32 | �Achnella caduca (Beal) Barkworth | Mandan ricegrass | Poaceae
|
| ACHNE | �Achnella Barkworth | ricegrass | Poaceae
|
| ACEM3 | Achras emarginata (L.) Little | Manilkara jaimiqui ssp. emarginata | Sapotaceae
|
| ACMA8 | Achras mammosa L. | Pouteria sapota | Sapotaceae
|
| ACZA2 | Achras zapota L. | Manilkara zapota | Sapotaceae
|
| ACKO3 | Achroschizocarpus kolianus Gomb�cz | Smelowskia borealis var. koliana | Brassicaceae
|
| ACMO2 | Achyrachaena mollis Schauer | blow wives | Asteraceae
|
| ACHYR | Achyrachaena Schauer | blow wives | Asteraceae
|
| ACAL4 | Achyranthes altissima Jacq. | Chamissoa altissima | Amaranthaceae
|
| ACASA | Achyranthes aspera L. var. aspera | devil's horsewhip | Amaranthaceae
|
| ACASP | Achyranthes aspera L. var. pubescens (Moq.) Townsend | devil's horsewhip | Amaranthaceae
|
| ACAS | Achyranthes aspera L. | devil's horsewhip | Amaranthaceae
|
| ACAT | Achyranthes atollensis St. John | Hawai'i chaff flower | Amaranthaceae
|
| ACBE3 | Achyranthes bettzichiana (Regel) Standl. | Alternanthera bettzichiana | Amaranthaceae
|
| ACBR2 | Achyranthes brasiliana (L.) Standl. | Alternanthera brasiliana | Amaranthaceae
|
| ACFIB | Achyranthes ficoidea (L.) Lam. ssp. bettzichiana (Regel) Baker | Alternanthera bettzichiana | Amaranthaceae
|
| ACFI2 | Achyranthes ficoidea auct. non (L.) Lam. | Alternanthera tenella | Amaranthaceae
|
| ACIN4 | Achyranthes indica (L.) P. Mill. | Achyranthes aspera var. aspera | Amaranthaceae
|
| ACJAH | Achyranthes japonica (Miq.) Nakai var. hachijoensis Honda | Japanese chaff flower | Amaranthaceae
|
| ACJA | Achyranthes japonica (Miq.) Nakai | Japanese chaff flower | Amaranthaceae
|
| ACLE5 | Achyranthes leiantha (Seub.) Standl. | Alternanthera pungens | Amaranthaceae
|
| ACMA6 | Achyranthes maritima (Mart.) Standl. | Alternanthera maritima | Amaranthaceae
|
| ACMU2 | Achyranthes mutica Gray | blunt chaff flower | Amaranthaceae
|
| ACNE3 | Achyranthes nelsonii St. John | Achyranthes mutica | Amaranthaceae
|
| ACPA4 | Achyranthes paronichyoides auct. non (L.) Lam. | Alternanthera paronichyoides var. paronichyoides | Amaranthaceae
|
| ACPE3 | Achyranthes peploides (Humb. & Bonpl. ex J.A. Schultes) Britt. & Wilson | Alternanthera caracasana | Amaranthaceae
|
| ACPH | Achyranthes philoxeroides (Mart.) Standl. | Alternanthera philoxeroides | Amaranthaceae
|
| ACPO5 | Achyranthes portoricensis (Kuntze) Standl. | Alternanthera crucis | Amaranthaceae
|
| ACPR2 | Achyranthes prostrata L. | Cyathula prostrata | Amaranthaceae
|
| ACRA2 | Achyranthes ramosissima auct. non (Mart.) Standl. | Alternanthera flavescens | Amaranthaceae
|
| ACRE5 | Achyranthes repens L. | Alternanthera pungens | Amaranthaceae
|
| ACSE4 | Achyranthes sessilis (L.) Desf. ex Steud. | Alternanthera sessilis | Amaranthaceae
|
| ACSPR | Achyranthes splendens Mart. ex Moq. var. reflecta Hbd. | Achyranthes splendens var. rotundata | Amaranthaceae
|
| ACSPR2 | Achyranthes splendens Mart. ex Moq. var. rotundata Hbd. | Maui chaff flower | Amaranthaceae
|
| ACSPS | Achyranthes splendens Mart. ex Moq. var. splendens | Maui chaff flower | Amaranthaceae
|
| ACSP3 | Achyranthes splendens Mart. ex Moq. | Maui chaff flower | Amaranthaceae
|
| ACHYR2 | Achyranthes L. | chaff flower | Amaranthaceae
|
| ACCO3 | Achyronychia cooperi Torr. & Gray | onyxflower | Caryophyllaceae
|
| ACHYR3 | Achyronychia Torr. & Gray | achyronychia | Caryophyllaceae
|
| ACRO2 | Achyrophorus roseus Less. | Pinaropappus roseus var. roseus | Asteraceae
|
| ACTR2 | Acicarpha tribuloides Juss. | madam gorgon | Calyceraceae
|
| ACICA | Acicarpha Juss. | acicarpha | Calyceraceae
|
| ACBI7 | Acidanthera bicolor Hochst. | Gladiolus murielae | Iridaceae
|
| ACIDA | Acidanthera Hochstetter | acidanthera | Iridaceae
|
| ACAR2 | Acinos arvensis (Lam.) Dandy | basil thyme | Lamiaceae
|
| ACTH3 | Acinos thymoides (L.) Moench | Acinos arvensis | Lamiaceae
|
| ACINO | Acinos P. Mill. | acinos | Lamiaceae
|
| ACFE2 | Aciphylla ferox W.R.B. Oliv. | fierce Spaniard | Apiaceae
|
| ACIPH | Aciphylla J.R. Forst. & G. Forst. | fierce Spaniard | Apiaceae
|
| ACAC4 | Acisanthera acisanthera (L.) Britt. | Acisanthera quadrata | Melastomataceae
|
| ACER6 | Acisanthera erecta Gleason | acisanthera | Melastomataceae
|
| ACQU | Acisanthera quadrata Pers. | dustseed | Melastomataceae
|
| ACISA | Acisanthera P. Br. | acisanthera | Melastomataceae
|
| ACAC | Acleisanthes acutifolia Standl. | needletip trumpets | Nyctaginaceae
|
| ACAN2 | Acleisanthes anisophylla Gray | obliqueleaf trumpets | Nyctaginaceae
|
| ACBE4 | Acleisanthes berlandieri Gray | Acleisanthes obtusa | Nyctaginaceae
|
| ACCR | Acleisanthes crassifolia Gray | Texas trumpets | Nyctaginaceae
|
| ACGR8 | Acleisanthes greggii Standl. | Acleisanthes obtusa | Nyctaginaceae
|
| ACLO2 | Acleisanthes longiflora Gray | angel's trumpets | Nyctaginaceae
|
| ACOB2 | Acleisanthes obtusa (Choisy) Standl. | Berlandier's trumpets | Nyctaginaceae
|
| ACWR3 | Acleisanthes wrightii (Gray) Benth. & Hook. f. ex Hemsl. | Wright's trumpets | Nyctaginaceae
|
| ACLEI | Acleisanthes Gray | trumpets | Nyctaginaceae
|
| ACDE5 | Acmella decumbens (Sm.) R.K. Jansen | creeping spotflower | Asteraceae
|
| ACIO | Acmella iodiscaea (A.H. Moore) R.K. Jansen | maluco | Asteraceae
|
| ACOPR | Acmella oppositifolia (Lam.) R.K. Jansen var. repens (Walt.) R.K. Jansen | oppositeleaf spotflower | Asteraceae
|
| ACOP | Acmella oppositifolia (Lam.) R.K. Jansen | oppositeleaf spotflower | Asteraceae
|
| ACPI4 | Acmella pilosa R.K. Jansen | hairy spotflower | Asteraceae
|
| ACPU | Acmella pusilla (Hook. & Arn.) R.K. Jansen | dwarf spotflower | Asteraceae
|
| ACRE6 | Acmella repens (Walt.) L.C. Rich. | Acmella oppositifolia var. repens | Asteraceae
|
| ACMEL | Acmella L.C. Rich. ex Pers. | spotflower | Asteraceae
|
| ACAM4 | Acmispon americanum (Nutt.) Rydb. | Lotus unifoliolatus var. unifoliolatus | Fabaceae
|
| ACHE5 | Acmispon helleri (Britt.) Heller | Lotus unifoliolatus var. helleri | Fabaceae
|
| ACAL3 | Acnida alabamensis Standl. | Amaranthus australis | Amaranthaceae
|
| ACALP | Acnida altissima (Riddell) Moq. ex Standl. var. prostrata (Uline & Bray) Fern. | Amaranthus tuberculatus | Amaranthaceae
|
| ACALS | Acnida altissima (Riddell) Moq. ex Standl. var. subnuda (S. Wats.) Fern. | Amaranthus tuberculatus | Amaranthaceae
|
| ACAL5 | Acnida altissima (Riddell) Moq. ex Standl. | Amaranthus tuberculatus | Amaranthaceae
|
| ACAU4 | Acnida australis Gray | Amaranthus australis | Amaranthaceae
|
| ACCA11 | Acnida cannabina L. | Amaranthus cannabinus | Amaranthaceae
|
| ACCO8 | Acnida concatenata (Moq.) Small | Amaranthus tuberculatus | Amaranthaceae
|
| ACCU3 | Acnida cuspidata Bertero ex Spreng. | Amaranthus australis | Amaranthaceae
|
| ACFL2 | Acnida floridana S. Wats. | Amaranthus floridanus | Amaranthaceae
|
| ACSU | Acnida subnuda (S. Wats.) Standl. | Amaranthus tuberculatus | Amaranthaceae
|
| ACTAP | Acnida tamariscina (Nutt.) Wood var. prostrata Uline & Bray | Amaranthus tuberculatus | Amaranthaceae
|
| ACTA | Acnida tamariscina auct. non (Nutt.) Wood | Amaranthus rudis | Amaranthaceae
|
| ACTU | Acnida tuberculata Moq. | Amaranthus tuberculatus | Amaranthaceae
|
| ACAR | Acnistus arborescens (L.) Schlecht. | hollowheart | Solanaceae
|
| ACNIS | Acnistus Schott | acnistus | Solanaceae
|