| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| AGIDB | Agrostis idahoensis Nash var. bakeri (Rydb.) W.A. Weber | Agrostis mertensii | Poaceae
|
| AGID | Agrostis idahoensis Nash | Idaho bentgrass | Poaceae
|
| AGIN6 | Agrostis indica L. | Sporobolus indicus var. indicus | Poaceae
|
| AGIN7 | Agrostis inflata Scribn. | Agrostis microphylla | Poaceae
|
| AGIN4 | Agrostis interrupta L. | Apera interrupta | Poaceae
|
| AGKE2 | Agrostis kennedyana Beetle | Agrostis tandilensis | Poaceae
|
| AGLE2 | Agrostis lepida A.S. Hitchc. | Agrostis pallens | Poaceae
|
| AGLOA | Agrostis longiligula A.S. Hitchc. var. australis J.T. Howell | Agrostis exarata | Poaceae
|
| AGLO2 | Agrostis longiligula A.S. Hitchc. | Agrostis exarata | Poaceae
|
| AGMA10 | Agrostis maritima Lam. | Agrostis stolonifera | Poaceae
|
| AGMA9 | Agrostis matrella L. | Zoysia matrella var. matrella | Poaceae
|
| AGME | Agrostis melaleuca (Trin.) A.S. Hitchc. | Agrostis exarata | Poaceae
|
| AGMEB | Agrostis mertensii Trin. ssp. borealis (Hartman) Tzvelev | Agrostis mertensii | Poaceae
|
| AGME3 | Agrostis mertensii Trin. | northern bentgrass | Poaceae
|
| AGME4 | Agrostis mexicana L. | Muhlenbergia mexicana | Poaceae
|
| AGMIH | Agrostis microphylla Steud. var. hendersonii (A.S. Hitchc.) Beetle | Agrostis hendersonii | Poaceae
|
| AGMII | Agrostis microphylla Steud. var. intermedia Beetle | Agrostis microphylla | Poaceae
|
| AGMIM | Agrostis microphylla Steud. var. major Vasey | Agrostis exarata | Poaceae
|
| AGMI3 | Agrostis microphylla Steud. | small-leaf bentgrass | Poaceae
|
| AGMI6 | Agrostis miliacea L. | Piptatherum miliaceum | Poaceae
|
| AGMI5 | Agrostis minima L. | Mibora minima | Poaceae
|
| AGNI | Agrostis nigra With. | Agrostis gigantea | Poaceae
|
| AGOR | Agrostis oregonensis Vasey | Oregon bentgrass | Poaceae
|
| AGOR3 | Agrostis oreophila Trin. | Agrostis perennans | Poaceae
|
| AGPAV | Agrostis pallens Trin. var. vaseyi St. John | Agrostis pallens | Poaceae
|
| AGPA8 | Agrostis pallens Trin. | seashore bentgrass | Poaceae
|
| AGPA17 | Agrostis palustris Huds. | Agrostis stolonifera | Poaceae
|
| AGPEA | Agrostis perennans (Walt.) Tuckerman var. aestivalis Vasey | Agrostis perennans | Poaceae
|
| AGPEE | Agrostis perennans (Walt.) Tuckerman var. elata (Pursh) A.S. Hitchc. | Agrostis perennans | Poaceae
|
| AGPE | Agrostis perennans (Walt.) Tuckerman | upland bentgrass | Poaceae
|
| AGPU7 | Agrostis purpurascens Sw. | Sporobolus purpurascens | Poaceae
|
| AGPY | Agrostis pyramidata Lam. | Sporobolus coromandelianus | Poaceae
|
| AGRA | Agrostis racemosa Michx. | Muhlenbergia racemosa | Poaceae
|
| AGRA2 | Agrostis radiata L. | Chloris radiata | Poaceae
|
| AGRE5 | Agrostis retrofracta Willd. | Agrostis avenacea | Poaceae
|
| AGRO4 | Agrostis rossiae Vasey | Ross' bentgrass | Poaceae
|
| AGRU2 | Agrostis rupestris auct. non All. | Agrostis mertensii | Poaceae
|
| AGSA3 | Agrostis sandwicensis Hbd. | Hawai'i bentgrass | Poaceae
|
| AGSCS4 | Agrostis scabra Willd. ssp. septentrionalis (Fern.) A.& D. L�ve | Agrostis scabra | Poaceae
|
| AGSCG | Agrostis scabra Willd. var. geminata (Trin.) Swallen | Agrostis scabra | Poaceae
|
| AGSCS | Agrostis scabra Willd. var. septentrionalis Fern. | Agrostis scabra | Poaceae
|
| AGSC5 | Agrostis scabra Willd. | rough bentgrass | Poaceae
|
| AGSC6 | Agrostis schweinitzii Trin. | Agrostis perennans | Poaceae
|
| AGSE2 | Agrostis semiverticillata (Forsk.) C. Christens. | Polypogon viridis | Poaceae
|
| AGSO | Agrostis sobolifera Muhl. ex Willd. | Muhlenbergia sobolifera | Poaceae
|
| AGSP2 | Agrostis spica-venti L. | Apera spica-venti | Poaceae
|
| AGSTG | Agrostis stolonifera L. ssp. gigantea (Roth) Schuebl. & Martens | Agrostis gigantea | Poaceae
|
| AGSTC | Agrostis stolonifera L. var. compacta Hartman | Agrostis stolonifera | Poaceae
|
| AGSTM | Agrostis stolonifera L. var. major (Gaudin) Farw. | Agrostis gigantea | Poaceae
|
| AGSTP | Agrostis stolonifera L. var. palustris (Huds.) Farw. | Agrostis stolonifera | Poaceae
|
| AGST2 | Agrostis stolonifera L. | creeping bentgrass | Poaceae
|
| AGST5 | Agrostis stricta J.F. Gmel. | Agrostis vinealis | Poaceae
|
| AGSY2 | Agrostis sylvatica Huds. | Agrostis capillaris | Poaceae
|
| AGSY | Agrostis sylvatica Torr., non Huds. | Muhlenbergia sylvatica | Poaceae
|
| AGTA | Agrostis tandilensis (Kuntze) Parodi | Kennedy's bentgrass | Poaceae
|
| AGTE5 | Agrostis tenuiflora Willd. | Muhlenbergia tenuiflora | Poaceae
|
| AGTEA | Agrostis tenuis Sibthorp var. aristata (Parnell) Druce | Agrostis capillaris | Poaceae
|
| AGTEH | Agrostis tenuis Sibthorp var. hispida (Willd.) Philipson | Agrostis capillaris | Poaceae
|
| AGTEP | Agrostis tenuis Sibthorp var. pumila (L.) Druce | Agrostis capillaris | Poaceae
|
| AGTE | Agrostis tenuis Sibthorp | Agrostis capillaris | Poaceae
|
| AGTH2 | Agrostis thurberiana A.S. Hitchc. | Agrostis humilis | Poaceae
|
| AGTR7 | Agrostis trichopodes Ell. | Muhlenbergia capillaris var. trichopodes | Poaceae
|
| AGTR4 | Agrostis trinii Turcz. | Agrostis vinealis | Poaceae
|
| AGVA | Agrostis variabilis Rydb. | mountain bentgrass | Poaceae
|
| AGVA4 | Agrostis variabilis auct. non Rydb. | Agrostis rossiae | Poaceae
|
| AGVE4 | Agrostis ventricosa auct. non Gouan | Gastridium phleoides | Poaceae
|
| AGVE2 | Agrostis verticillata Vill. | Polypogon viridis | Poaceae
|
| AGVIT | Agrostis vinealis Schreb. ssp. trinii (Turcz.) Tzvelev | Agrostis vinealis | Poaceae
|
| AGVI9 | Agrostis vinealis Schreb. | brown bentgrass | Poaceae
|
| AGVI8 | Agrostis virginica L. | Sporobolus virginicus | Poaceae
|
| AGVI11 | Agrostis viridis Gouan | Polypogon viridis | Poaceae
|
| AGVU2 | Agrostis vulgaris With. | Agrostis capillaris | Poaceae
|
| AGROS2 | Agrostis L. | bentgrass | Poaceae
|
| AGRU3 | Agyrium rufum (Pers.) Fr. | agyrium lichen | Agyriaceae
|
| AGYRI | Agyrium Fr. | agyrium | Agyriaceae
|
| AGLE4 | Agyrophora leiocarpa (DC.) Gyelnik | Umbilicaria leiocarpa | Umbilicariaceae
|
| AGLY | Agyrophora lyngei (Schol.) Llano | Umbilicaria lyngei | Umbilicariaceae
|
| AGRI4 | Agyrophora rigida (Du Rietz) Llano | Umbilicaria rigida | Umbilicariaceae
|
| AGSC8 | Agyrophora scholanderi Llano | Umbilicaria scholanderi | Umbilicariaceae
|
| AHSP2 | Ahlesia sphaerospora (H. Magn.) Salisb. | Thelocarpon sphaerosporum | Acarosporaceae
|
| AHAU | Ahtiana aurescens (Tuck.) Thell & Randlane | | Parmeliaceae
|
| AHPA | Ahtiana pallidula (Tuck. ex Riddle) Goward & Thell | | Parmeliaceae
|
| AHSP | Ahtiana sphaerosporella (Mull. Arg.) Goward | ahtiana lichen | Parmeliaceae
|
| AHTIA | Ahtiana Goward | ahtiana | Parmeliaceae
|
| AIAL | Ailanthus altissima (P. Mill.) Swingle | tree of heaven | Simaroubaceae
|
| AIGL | Ailanthus glandulosa Desf. | Ailanthus altissima | Simaroubaceae
|
| AILAN | Ailanthus Desf. | ailanthus | Simaroubaceae
|
| AIAC | Aiphanes acanthophylla (Mart.) Burret | Aiphanes minima | Arecaceae
|
| AICA5 | Aiphanes caryotifolia (Kunth) H. A. Wendl. | coyure palm | Arecaceae
|
| AICO | Aiphanes corallina (C. Martius) H. A. Wendl. ex Griseb. | coyor | Arecaceae
|
| AIMI | Aiphanes minima (Gaertn.) Burret | Guinea bactris | Arecaceae
|
| AIPHA | Aiphanes Willd. | aiphanes | Arecaceae
|
| AIAQ | Aira aquatica L. | Catabrosa aquatica | Poaceae
|
| AIAT | Aira atropurpurea Wahlenb. | Vahlodea atropurpurea | Poaceae
|
| AICA2 | Aira caerulea L. | Molinia caerulea | Poaceae
|
| AICA6 | Aira caespitosa L. | Deschampsia caespitosa | Poaceae
|
| AICA4 | Aira canescens L. | Corynephorus canescens | Poaceae
|
| AICA3 | Aira capillaris Host, non Savi | Aira elegans | Poaceae
|
| AICAC | Aira caryophyllea L. var. capillaris (Host) Mutel | Aira elegans | Poaceae
|
| AICA | Aira caryophyllea L. | silver hairgrass | Poaceae
|
| AICE | Aira cespitosa L. [orthographic variant] | Deschampsia caespitosa | Poaceae
|