| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| AGUTN | Agave utahensis Engelm. var. nevadensis Engelm. ex Greenm. & Roush | Nevada agave | Agavaceae
|
| AGUTU | Agave utahensis Engelm. var. utahensis | Utah agave | Agavaceae
|
| AGUT | Agave utahensis Engelm. | Utah agave | Agavaceae
|
| AGVA3 | Agave variegata Jacobi | Manfreda variegata | Agavaceae
|
| AGVI6 | Agave virginica L. | Manfreda virginica | Agavaceae
|
| AGWE | Agave weberi Cels ex Poisson | Weber's century plant | Agavaceae
|
| AGXY | Agave xylonacantha Salm-Dyck | century plant | Agavaceae
|
| AGAVE | Agave L. | agave | Agavaceae
|
| AGCL3 | Agdestis clematidea Moc. & Sess� ex DC. | rockroot | Phytolaccaceae
|
| AGDES2 | Agdestis Moc. & Sess� ex DC. | agdestis | Phytolaccaceae
|
| AGAD2 | Ageratina adenophora (Spreng.) King & H.E. Robins. | sticky snakeroot | Asteraceae
|
| AGALA | Ageratina altissima (L.) King & H.E. Robins. var. altissima | white snakeroot | Asteraceae
|
| AGALA2 | Ageratina altissima (L.) King & H.E. Robins. var. angustata (Gray) Clewell & Woot. | white snakeroot | Asteraceae
|
| AGALR | Ageratina altissima (L.) King & H.E. Robins. var. roanensis (Small) Clewell & Woot. | white snakeroot | Asteraceae
|
| AGAL5 | Ageratina altissima (L.) King & H.E. Robins. | white snakeroot | Asteraceae
|
| AGARA | Ageratina aromatica (L.) Spach var. aromatica | lesser snakeroot | Asteraceae
|
| AGARI2 | Ageratina aromatica (L.) Spach var. incisa (Gray) C.F. Reed | lesser snakeroot | Asteraceae
|
| AGAR4 | Ageratina aromatica (L.) Spach | lesser snakeroot | Asteraceae
|
| AGHA4 | Ageratina havanensis (Kunth) King & H.E. Robins. | Havana snakeroot | Asteraceae
|
| AGHE5 | Ageratina herbacea (Gray) King & H.E. Robins. | fragrant snakeroot | Asteraceae
|
| AGJU2 | Ageratina jucunda (Greene) Clewell & Woot. | hammock snakeroot | Asteraceae
|
| AGLE3 | Ageratina lemmonii (B.L. Robins.) King & H.E. Robins. | Lemmon's snakeroot | Asteraceae
|
| AGLU | Ageratina luciae-brauniae (Fern.) King & H.E. Robins. | Lucy Braun's snakeroot | Asteraceae
|
| AGOC2 | Ageratina occidentalis (Hook.) King & H.E. Robins. | western snakeroot | Asteraceae
|
| AGPA13 | Ageratina paupercula (Gray) King & H.E. Robins. | Santa Rita snakeroot | Asteraceae
|
| AGRE3 | Ageratina resiniflua (Urban) King & H.E. Robins. | resinous snakeroot | Asteraceae
|
| AGRI2 | Ageratina riparia (Regel) King & H.E. Robins. | spreading snakeroot | Asteraceae
|
| AGRO5 | Ageratina rothrockii (Gray) King & H.E. Robins. | Rothrock's snakeroot | Asteraceae
|
| AGSH2 | Ageratina shastensis (Taylor & Stebbins) King & H.E. Robins. | Shasta snakeroot | Asteraceae
|
| AGWR2 | Ageratina wrightii (Gray) King & H.E. Robins. | Wright's snakeroot | Asteraceae
|
| AGERA2 | Ageratina Spach | snakeroot | Asteraceae
|
| AGAL9 | Ageratum altissimum L., non Eupatorium altissimum L. | Ageratina altissima var. altissima | Asteraceae
|
| AGCO | Ageratum conyzoides L. | tropical whiteweed | Asteraceae
|
| AGCO2 | Ageratum corymbosum Zuccagni | flat-top whiteweed | Asteraceae
|
| AGGU | Ageratum guatemalense M.F. Johnson | Ageratum corymbosum | Asteraceae
|
| AGHO3 | Ageratum houstonianum P. Mill. | bluemink | Asteraceae
|
| AGLI3 | Ageratum littorale Gray | Cape Sable whiteweed | Asteraceae
|
| AGERA | Ageratum L. | whiteweed | Asteraceae
|
| AGPO4 | Aglaia ponapensis Kanehira | | Meliaceae
|
| AGLAI | Aglaia Lour. | | Meliaceae
|
| AGCOM | Aglaonema commutatum Schott var. maculatum (Hook. f.) Nicolson | Philippine evergreen | Araceae
|
| AGCO4 | Aglaonema commutatum Schott | Philippine evergreen | Araceae
|
| AGPI2 | Aglaonema pictum (Roxb.) Kunth | cara de caballo | Araceae
|
| AGLAO | Aglaonema Schott | aglaonema | Araceae
|
| AGTR8 | Agonimia tristicula (Nyl.) Zahlbr. | agonimia lichen | Verrucariaceae
|
| AGONI | Agonimia Zahlbr. | agonimia | Verrucariaceae
|
| AGAG | Agoseris agrestis Osterhout | Agoseris glauca var. agrestis | Asteraceae
|
| AGAL10 | Agoseris alpestris (Gray) Greene | Nothocalais alpestris | Asteraceae
|
| AGAPM2 | Agoseris apargioides (Less.) Greene ssp. maritima (Sheldon) Q. Jones | Agoseris apargioides var. maritima | Asteraceae
|
| AGAPA | Agoseris apargioides (Less.) Greene var. apargioides | woolly goat chicory | Asteraceae
|
| AGAPE | Agoseris apargioides (Less.) Greene var. eastwoodiae (Fedde) Munz | woolly goat chicory | Asteraceae
|
| AGAPM | Agoseris apargioides (Less.) Greene var. maritima (Sheldon) Q. Jones ex Cronq. | woolly goat chicory | Asteraceae
|
| AGAP2 | Agoseris apargioides (Less.) Greene | woolly goat chicory | Asteraceae
|
| AGAR5 | Agoseris arizonica Greene | Agoseris glauca var. laciniata | Asteraceae
|
| AGAUP2 | Agoseris aurantiaca (Hook.) Greene ssp. purpurea (Gray) G.W. Douglas | Agoseris aurantiaca var. purpurea | Asteraceae
|
| AGAUA | Agoseris aurantiaca (Hook.) Greene var. aurantiaca | orange agoseris | Asteraceae
|
| AGAUP | Agoseris aurantiaca (Hook.) Greene var. purpurea (Gray) Cronq. | orange agoseris | Asteraceae
|
| AGAU2 | Agoseris aurantiaca (Hook.) Greene | orange agoseris | Asteraceae
|
| AGBA4 | Agoseris barbellulata (Greene ex Gray) Greene | Nothocalais alpestris | Asteraceae
|
| AGCU2 | Agoseris cuspidata (Pursh) Raf. | Nothocalais cuspidata | Asteraceae
|
| AGEA | Agoseris eastwoodiae Fedde | Agoseris apargioides var. eastwoodiae | Asteraceae
|
| AGEL | Agoseris elata (Nutt.) Greene | tall agoseris | Asteraceae
|
| AGGLS | Agoseris glauca (Pursh) Raf. ssp. scorzonerifolia (Schrad.) Piper | Agoseris glauca var. dasycephala | Asteraceae
|
| AGGLA | Agoseris glauca (Pursh) Raf. var. agrestis (Osterhout) Q. Jones ex Cronq. | pale agoseris | Asteraceae
|
| AGGLA2 | Agoseris glauca (Pursh) Raf. var. asper (Rydb.) Cronq. | Agoseris glauca var. dasycephala | Asteraceae
|
| AGGLC | Agoseris glauca (Pursh) Raf. var. cronquistii Welsh | pale agoseris | Asteraceae
|
| AGGLD | Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. & Gray) Jepson | pale agoseris | Asteraceae
|
| AGGLG | Agoseris glauca (Pursh) Raf. var. glauca | pale agoseris | Asteraceae
|
| AGGLL | Agoseris glauca (Pursh) Raf. var. laciniata (D.C. Eat.) Smiley | false agoseris | Asteraceae
|
| AGGLM | Agoseris glauca (Pursh) Raf. var. monticola (Greene) Q. Jones ex Cronq. | pale agoseris | Asteraceae
|
| AGGLP | Agoseris glauca (Pursh) Raf. var. parviflora (Nutt.) Rydb. | Agoseris glauca var. laciniata | Asteraceae
|
| AGGLP2 | Agoseris glauca (Pursh) Raf. var. pumila (Nutt.) Garrett | Agoseris glauca var. dasycephala | Asteraceae
|
| AGGL | Agoseris glauca (Pursh) Raf. | pale agoseris | Asteraceae
|
| AGGR7 | Agoseris graminifolia Greene | Agoseris aurantiaca var. aurantiaca | Asteraceae
|
| AGGR | Agoseris grandiflora (Nutt.) Greene | bigflower agoseris | Asteraceae
|
| AGHEC2 | Agoseris heterophylla (Nutt.) Greene ssp. californica (Nutt.) Piper | Agoseris heterophylla var. heterophylla | Asteraceae
|
| AGHEN | Agoseris heterophylla (Nutt.) Greene ssp. normalis Piper | Agoseris heterophylla var. heterophylla | Asteraceae
|
| AGHEC | Agoseris heterophylla (Nutt.) Greene var. crenulata Jepson | annual agoseris | Asteraceae
|
| AGHEC3 | Agoseris heterophylla (Nutt.) Greene var. cryptopleura Jepson | Agoseris heterophylla var. heterophylla | Asteraceae
|
| AGHEH | Agoseris heterophylla (Nutt.) Greene var. heterophylla | annual agoseris | Asteraceae
|
| AGHEK | Agoseris heterophylla (Nutt.) Greene var. kymapleura Greene | Agoseris heterophylla var. heterophylla | Asteraceae
|
| AGHET | Agoseris heterophylla (Nutt.) Greene var. turgida (Hall) Jepson | annual agoseris | Asteraceae
|
| AGHE2 | Agoseris heterophylla (Nutt.) Greene | annual agoseris | Asteraceae
|
| AGHI4 | Agoseris hirsuta (Hook.) Greene | Agoseris apargioides var. apargioides | Asteraceae
|
| AGLA6 | Agoseris laciniata (Nutt.) Greene | Agoseris grandiflora | Asteraceae
|
| AGLA9 | Agoseris lackschewitzii D. Henderson & R. Moseley | Mill Creek agoseris | Asteraceae
|
| AGMA4 | Agoseris maritima Sheldon | Agoseris apargioides var. maritima | Asteraceae
|
| AGMO5 | Agoseris monticola Greene | Agoseris glauca var. monticola | Asteraceae
|
| AGPA14 | Agoseris parviflora (Nutt.) Greene | Agoseris glauca var. laciniata | Asteraceae
|
| AGPL3 | Agoseris plebeja (Greene) Greene | Agoseris grandiflora | Asteraceae
|
| AGRE | Agoseris retrorsa (Benth.) Greene | spearleaf agoseris | Asteraceae
|
| AGRO2 | Agoseris rostrata Rydb. | Agoseris aurantiaca var. aurantiaca | Asteraceae
|
| AGSC7 | Agoseris scorzonerifolia (Schrad.) Greene | Agoseris glauca var. dasycephala | Asteraceae
|
| AGTU3 | Agoseris turbinata Rydb. | Agoseris glauca var. glauca | Asteraceae
|
| AGOSE | Agoseris Raf. | agoseris | Asteraceae
|
| AGCY | Agrestia cyphellata J. W. Thomson | Agrestia hispida | Hymeneliaceae
|
| AGHI60 | Agrestia hispida (Mereschk.) Hale & Culb. | | Hymeneliaceae
|
| AGRES2 | Agrestia J. W. Thomson | agrestia | Hymeneliaceae
|
| AGBI | Agrimonia bicknellii (Kearney) Rydb. | Agrimonia pubescens | Rosaceae
|
| AGEU | Agrimonia eupatoria L. | churchsteeples | Rosaceae
|
| AGGR2 | Agrimonia gryposepala Wallr. | tall hairy agrimony | Rosaceae
|