| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ACVE7 | Achaetogeron versicolor Greenm. | Erigeron versicolor | Asteraceae
|
| ACAG | Achillea ageratifolia (Sibth. & Smith) Boiss. | yarrow | Asteraceae
|
| ACAG3 | Achillea ageratum L. | sweet yarrow | Asteraceae
|
| ACAL11 | Achillea alpicola (Rydb.) Rydb. | Achillea millefolium var. alpicola | Asteraceae
|
| ACAN7 | Achillea angustissima Rydb. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACAR6 | Achillea arenicola Heller | Achillea millefolium var. arenicola | Asteraceae
|
| ACAS2 | Achillea aspleniifolia auct. non Vent. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACBOA | Achillea borealis Bong. ssp. arenicola (Heller) Keck | Achillea millefolium var. arenicola | Asteraceae
|
| ACBOC | Achillea borealis Bong. ssp. californica (Pollard) Keck | Achillea millefolium var. californica | Asteraceae
|
| ACBOT | Achillea borealis Bong. ssp. typica Keck | Achillea millefolium var. borealis | Asteraceae
|
| ACBOA2 | Achillea borealis Bong. var. arenicola (Heller) J.T. Howell | Achillea millefolium var. arenicola | Asteraceae
|
| ACBOC2 | Achillea borealis Bong. var. californica (Pollard) J.T. Howell | Achillea millefolium var. californica | Asteraceae
|
| ACBO | Achillea borealis Bong. | Achillea millefolium var. borealis | Asteraceae
|
| ACCA7 | Achillea californica Pollard | Achillea millefolium var. californica | Asteraceae
|
| ACDE10 | Achillea dentifera DC. | Achillea distans | Asteraceae
|
| ACDI6 | Achillea distans Waldst. & Kit. ex Willd. | Alps yarrow | Asteraceae
|
| ACER2 | Achillea eradiata Piper | Achillea millefolium var. occidentalis | Asteraceae
|
| ACFI | Achillea filipendulina Lam. | fernleaf yarrow | Asteraceae
|
| ACFU | Achillea fusca Rydb. | Achillea millefolium var. alpicola | Asteraceae
|
| ACGI2 | Achillea gigantea Pollard | Achillea millefolium var. gigantea | Asteraceae
|
| ACGR5 | Achillea gracilis Raf. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACLAA | Achillea lanulosa Nutt. ssp. alpicola (Rydb.) Keck | Achillea millefolium var. alpicola | Asteraceae
|
| ACLAT | Achillea lanulosa Nutt. ssp. typica Keck | Achillea millefolium var. occidentalis | Asteraceae
|
| ACLAA2 | Achillea lanulosa Nutt. var. alpicola Rydb. | Achillea millefolium var. alpicola | Asteraceae
|
| ACLAA3 | Achillea lanulosa Nutt. var. arachnoidea Lunell | Achillea millefolium var. occidentalis | Asteraceae
|
| ACLAE | Achillea lanulosa Nutt. var. eradiata (Piper) M.E. Peck | Achillea millefolium var. occidentalis | Asteraceae
|
| ACLA5 | Achillea lanulosa Nutt. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACLA3 | Achillea laxiflora Pollard & Cockerell | Achillea millefolium var. occidentalis | Asteraceae
|
| ACLI2 | Achillea ligustica All. | Ligurian yarrow | Asteraceae
|
| ACMIA3 | Achillea millefolium L. ssp. atrotegula Boivin | Achillea millefolium var. borealis | Asteraceae
|
| ACMIB2 | Achillea millefolium L. ssp. borealis (Bong.) Breitung | Achillea millefolium var. borealis | Asteraceae
|
| ACMIL | Achillea millefolium L. ssp. lanulosa (Nutt.) Piper | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIO2 | Achillea millefolium L. ssp. occidentalis (DC.) Hyl. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIP5 | Achillea millefolium L. ssp. pallidotegula Boivin | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIA | Achillea millefolium L. var. alpicola (Rydb.) Garrett | common yarrow | Asteraceae
|
| ACMIA2 | Achillea millefolium L. var. arenicola (Heller) Nobs | common yarrow | Asteraceae
|
| ACMIA4 | Achillea millefolium L. var. aspleniifolia (Vent.) Farw. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIB | Achillea millefolium L. var. borealis (Bong.) Farw. | boreal yarrow | Asteraceae
|
| ACMIC | Achillea millefolium L. var. californica (Pollard) Jepson | California yarrow | Asteraceae
|
| ACMIF2 | Achillea millefolium L. var. fulva Boivin | Achillea millefolium var. borealis | Asteraceae
|
| ACMIF | Achillea millefolium L. var. fusca (Rydb.) G.N. Jones | Achillea millefolium var. alpicola | Asteraceae
|
| ACMIG | Achillea millefolium L. var. gigantea (Pollard) Nobs | giant yarrow | Asteraceae
|
| ACMIG2 | Achillea millefolium L. var. gracilis Raf. ex DC. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIL3 | Achillea millefolium L. var. lanulosa (Nutt.) Piper | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIL2 | Achillea millefolium L. var. litoralis Ehrend. ex Nobs | coast yarrow | Asteraceae
|
| ACMIM4 | Achillea millefolium L. var. maritima Jepson | Achillea millefolium var. arenicola | Asteraceae
|
| ACMIM2 | Achillea millefolium L. var. millefolium | common yarrow | Asteraceae
|
| ACMIN | Achillea millefolium L. var. nigrescens E. Mey. | common yarrow | Asteraceae
|
| ACMIO | Achillea millefolium L. var. occidentalis DC. | western yarrow | Asteraceae
|
| ACMIP | Achillea millefolium L. var. pacifica (Rydb.) G.N. Jones | Pacific yarrow | Asteraceae
|
| ACMIP3 | Achillea millefolium L. var. parviligula Boivin | Achillea millefolium var. borealis | Asteraceae
|
| ACMIP4 | Achillea millefolium L. var. parvula Boivin | Achillea millefolium var. borealis | Asteraceae
|
| ACMIP2 | Achillea millefolium L. var. puberula (Rydb.) Nobs | common yarrow | Asteraceae
|
| ACMIR | Achillea millefolium L. var. rosea (Desf.) Torr. & Gray | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMIR2 | Achillea millefolium L. var. russeolata Boivin | Achillea millefolium var. occidentalis | Asteraceae
|
| ACMI2 | Achillea millefolium L. | common yarrow | Asteraceae
|
| ACMU3 | Achillea multiflora Hook. | Achillea sibirica | Asteraceae
|
| ACNI4 | Achillea nigrescens (E. Mey.) Rydb. | Achillea millefolium var. nigrescens | Asteraceae
|
| ACNO | Achillea nobilis L. | noble yarrow | Asteraceae
|
| ACOC | Achillea occidentalis (DC.) Raf. ex Rydb. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACPA5 | Achillea pacifica Rydb. | Achillea millefolium var. pacifica | Asteraceae
|
| ACPT | Achillea ptarmica L. | sneezeweed | Asteraceae
|
| ACPU2 | Achillea puberula Rydb. | Achillea millefolium var. puberula | Asteraceae
|
| ACRO4 | Achillea rosea Desf. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACSI | Achillea sibirica Ledeb. | Siberian yarrow | Asteraceae
|
| ACSU3 | Achillea subalpina Greene | Achillea millefolium var. alpicola | Asteraceae
|
| ACTO3 | Achillea tomentosa Pursh, non L. | Achillea millefolium var. occidentalis | Asteraceae
|
| ACHIL | Achillea L. | yarrow | Asteraceae
|
| ACCA6 | Achlys californica Fukuda & Baker | deer's foot | Berberidaceae
|
| ACTR | Achlys triphylla (Sm.) DC. | sweet after death | Berberidaceae
|
| ACHLY | Achlys DC. | achlys | Berberidaceae
|
| ACAR14 | Achnatherum aridum (M.E. Jones) Barkworth | Mormon needlegrass | Poaceae
|
| ACBL | Achnatherum �bloomeri (Boland.) Barkworth | | Poaceae
|
| ACBR5 | Achnatherum brachychaetum (Godr.) Barkworth | shortbristled needlegrass | Poaceae
|
| ACCA34 | Achnatherum capense (Thunb.) Beauv. | Cape ricegrass | Poaceae
|
| ACCA31 | Achnatherum caudatum (Trin.) Barkworth, comb. nov. ined. | Chilean ricegrass | Poaceae
|
| ACCL7 | Achnatherum clandestinum (Hack.) Barkworth | Mexican ricegrass | Poaceae
|
| ACCO22 | Achnatherum contractum (B.L. Johnson) Barkworth | contracted ricegrass | Poaceae
|
| ACCO21 | Achnatherum coronatum (Thurb.) Barkworth | giant ricegrass | Poaceae
|
| ACCU6 | Achnatherum curvifolium (Swallen) Barkworth | Guadalupe ricegrass | Poaceae
|
| ACDI10 | Achnatherum diegoense (Swallen) Barkworth | San Diego needlegrass | Poaceae
|
| ACEM4 | Achnatherum eminens (Cav.) Barkworth | southwestern needlegrass | Poaceae
|
| ACHE10 | Achnatherum hendersonii (Vasey) Barkworth | Henderson's needlegrass | Poaceae
|
| ACHY | Achnatherum hymenoides (Roemer & J.A. Schultes) Barkworth | Indian ricegrass | Poaceae
|
| ACLA8 | Achnatherum latiglume (Swallen) Barkworth | Sierra needlegrass | Poaceae
|
| ACLEL | Achnatherum lemmonii (Swallen) Barkworth var. lemmonii | Lemmon's needlegrass | Poaceae
|
| ACLEP | Achnatherum lemmonii (Swallen) Barkworth var. pubescens (Crampton) Barkworth | pubescent Lemmon's needlegrass | Poaceae
|
| ACLE8 | Achnatherum lemmonii (Swallen) Barkworth | Lemmon's needlegrass | Poaceae
|
| ACLE9 | Achnatherum lettermanii (Vasey) Barkworth | Letterman's needlegrass | Poaceae
|
| ACLO7 | Achnatherum lobatum (Swallen) Barkworth | littleawn needlegrass | Poaceae
|
| ACNED | Achnatherum nelsonii (Scribn.) Barkworth ssp. dorei (Barkworth & Maze) Barkworth | Dore's needlegrass | Poaceae
|
| ACNEL2 | Achnatherum nelsonii (Scribn.) Barkworth ssp. longiaristatum (Barkworth & Maze) Barkworth | Achnatherum occidentale ssp. californicum | Poaceae
|
| ACNEN2 | Achnatherum nelsonii (Scribn.) Barkworth ssp. nelsonii | Columbia needlegrass | Poaceae
|
| ACNE9 | Achnatherum nelsonii (Scribn.) Barkworth | Columbia needlegrass | Poaceae
|
| ACNE10 | Achnatherum nevadense (B.L. Johnston) Barkworth | Nevada needlegrass | Poaceae
|
| ACOCC | Achnatherum occidentale (Thurb. ex S. Wats.) Barkworth ssp. californicum (Merr. & Burtt-Davey ex Hall) Barkworth | California needlegrass | Poaceae
|
| ACOCO | Achnatherum occidentale (Thurb. ex S. Wats.) Barkworth ssp. occidentale | western needlegrass | Poaceae
|
| ACOCP | Achnatherum occidentale (Thurb. ex S. Wats.) Barkworth ssp. pubescens (Vasey) Barkworth | pubescent western needlegrass | Poaceae
|
| ACOC3 | Achnatherum occidentale (Thurb. ex S. Wats.) Barkworth | western needlegrass | Poaceae
|
| ACPA12 | Achnatherum papposum (Nees) Barkworth | Jarava plumosa | Poaceae
|
| ACPAD | Achnatherum parishii (Vasey) Barkworth var. depauperatum (M.E. Jones) Barkworth | little Parish's needlegrass | Poaceae
|