| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| LUSUS4 | Lupinus sulphureus Dougl. ex Hook. var. subsaccatus (Suksdorf) C.L. Hitchc. | Lupinus bingenensis var. subsaccatus | Fabaceae
|
| LUSU5 | Lupinus sulphureus Dougl. ex Hook. | sulphur lupine | Fabaceae
|
| LUSU12 | Lupinus summae C.P. Sm. | Lupinus holosericeus | Fabaceae
|
| LUSUB3 | Lupinus superbus Heller var. bernardianus Abrams ex C.P. Sm. | Lupinus polyphyllus ssp. bernardianus | Fabaceae
|
| LUSUE | Lupinus superbus Heller var. elongatus (Greene ex Heller) C.P. Sm. | Lupinus polyphyllus ssp. superbus | Fabaceae
|
| LUSU6 | Lupinus superbus Heller | Lupinus polyphyllus ssp. superbus | Fabaceae
|
| LUSY | Lupinus sylvestris E. Drew, non Lam. | Lupinus elmeri | Fabaceae
|
| LUTED | Lupinus tegeticulatus Eastw. var. duranii (Eastw.) Barneby | Lupinus duranii | Fabaceae
|
| LUTEG | Lupinus tegeticulatus Eastw. var. grandiflorus (C.P. Sm.) Barneby | Lupinus breweri var. grandiflorus | Fabaceae
|
| LUTE8 | Lupinus tegeticulatus Eastw. | Lupinus breweri var. bryoides | Fabaceae
|
| LUTE3 | Lupinus tenellus Dougl. ex G. Don | Lupinus argenteus ssp. argenteus var. laxiflorus | Fabaceae
|
| LUTE4 | Lupinus tenellus Dougl. ex J.G. Agardh | Lupinus argenteus ssp. argenteus var. laxiflorus | Fabaceae
|
| LUTE5 | Lupinus tenuispicus A. Nels. | Lupinus leucophyllus ssp. erectus | Fabaceae
|
| LUTE7 | Lupinus termis Forsk. | Lupinus albus | Fabaceae
|
| LUTE | Lupinus texensis Hook. | Texas lupine | Fabaceae
|
| LUTH | Lupinus thompsonianus C.P. Sm. | Lupinus onustus | Fabaceae
|
| LUTIL | Lupinus tidestromii Greene var. layneae (Eastw.) Munz | Tidestrom's lupine | Fabaceae
|
| LUTIT | Lupinus tidestromii Greene var. tidestromii | Tidestrom's lupine | Fabaceae
|
| LUTI | Lupinus tidestromii Greene | Tidestrom's lupine | Fabaceae
|
| LUTR | Lupinus tracyi Eastw. | Tracy's lupine | Fabaceae
|
| LUTR3 | Lupinus trainianus C.P. Sm. | Lupinus alpestris | Fabaceae
|
| LUTR4 | Lupinus trifidus Torr. ex S. Wats. | Lupinus bicolor ssp. umbellatus var. trifidus | Fabaceae
|
| LUTR5 | Lupinus trifurcatus C.P. Sm. | Lupinus nootkatensis var. nootkatensis | Fabaceae
|
| LUTRB | Lupinus truncatus Nutt. ex Hook. & Arn. var. burlewii C.P. Sm. | Lupinus truncatus | Fabaceae
|
| LUTR2 | Lupinus truncatus Nutt. ex Hook. & Arn. | collared annual lupine | Fabaceae
|
| LUTU3 | Lupinus tuckerianus C.P. Sm. | Lupinus sericeus ssp. sericeus var. egglestonianus | Fabaceae
|
| LUUM | Lupinus umbellatus Greene | Lupinus bicolor ssp. umbellatus var. umbellatus | Fabaceae
|
| LUUN | Lupinus uncialis S. Wats. | inchhigh lupine | Fabaceae
|
| LUUR2 | Lupinus ursinus Eastw. | Lupinus sellulus ssp. ursinus | Fabaceae
|
| LUUT | Lupinus utahensis (S. Wats.) Moldenke p.p. | Lupinus caudatus ssp. caudatus | Fabaceae
|
| LUVAA | Lupinus vallicola Heller ssp. apricus (Greene) D. Dunn | open lupine | Fabaceae
|
| LUVAV | Lupinus vallicola Heller ssp. vallicola | open lupine | Fabaceae
|
| LUVAA2 | Lupinus vallicola Heller var. apricus (Greene) C.P. Sm. | Lupinus vallicola ssp. apricus | Fabaceae
|
| LUVA2 | Lupinus vallicola Heller | open lupine | Fabaceae
|
| LUVA | Lupinus varicolor Steud. | Lupinus versicolor | Fabaceae
|
| LUVE | Lupinus versicolor Lindl. | manycolored lupine | Fabaceae
|
| LUVID | Lupinus villosus Willd. ssp. diffusus (Nutt.) L. Phillips | Lupinus diffusus | Fabaceae
|
| LUVID2 | Lupinus villosus Willd. var. diffusus (Nutt.) Torr. & Gray | Lupinus diffusus | Fabaceae
|
| LUVI | Lupinus villosus Willd. | lady lupine | Fabaceae
|
| LUVID3 | Lupinus violaceus Heller var. delnortensis Eastw. | Lupinus onustus | Fabaceae
|
| LUVIS | Lupinus violaceus Heller var. shastensis Eastw. | Lupinus onustus | Fabaceae
|
| LUVI4 | Lupinus violaceus Heller | Lupinus onustus | Fabaceae
|
| LUVI5 | Lupinus viridicalyx C.P. Sm. | Lupinus polyphyllus ssp. superbus | Fabaceae
|
| LUVI3 | Lupinus viridifolius Heller | Lupinus latifolius ssp. viridifolius var. viridifolius | Fabaceae
|
| LUVOR | Lupinus volcanicus Greene var. rupestricola C.P. Sm. | Lupinus arcticus ssp. subalpinus | Fabaceae
|
| LUVO3 | Lupinus volcanicus Greene | Lupinus arcticus ssp. subalpinus | Fabaceae
|
| LUVO2 | Lupinus volutans Greene | pinyon lupine | Fabaceae
|
| LUWA3 | Lupinus washoensis Heller | Lupinus lyallii ssp. washoensis | Fabaceae
|
| LUWA2 | Lupinus watsonii Heller | Lupinus caespitosus var. utahensis | Fabaceae
|
| LUWE2 | Lupinus wenachensis Eastw. | Lupinus arbustus ssp. neolaxiflorus | Fabaceae
|
| LUWEA | Lupinus westianus Small var. aridorum (McFarlin ex Beckner) Isely | Gulf Coast lupine | Fabaceae
|
| LUWEW | Lupinus westianus Small var. westianus | Gulf Coast lupine | Fabaceae
|
| LUWE | Lupinus westianus Small | Gulf Coast lupine | Fabaceae
|
| LUWO | Lupinus wolfianus C.P. Sm. | Lupinus albicaulis var. albicaulis | Fabaceae
|
| LUWYT | Lupinus wyethii S. Wats. ssp. tetonensis (E. Nels.) Cox & D. Dunn | Teton lupine | Fabaceae
|
| LUWYW | Lupinus wyethii S. Wats. ssp. wyethii | Wyeth's lupine | Fabaceae
|
| LUWYH | Lupinus wyethii S. Wats. var. hansenii C.P. Sm. | Lupinus latifolius ssp. longipes | Fabaceae
|
| LUWYP | Lupinus wyethii S. Wats. var. prunophilus (M.E. Jones) C.P. Sm. | Lupinus prunophilus | Fabaceae
|
| LUWY | Lupinus wyethii S. Wats. | Wyeth's lupine | Fabaceae
|
| LUYA | Lupinus yakimensis C.P. Sm. | Lupinus arbustus ssp. neolaxiflorus | Fabaceae
|
| LUYU | Lupinus yukonensis Greene | Lupinus arcticus ssp. arcticus | Fabaceae
|
| LUPIN | Lupinus L. | lupine | Fabaceae
|
| LUCA17 | Luteidiscus calcisabulorus St. John | Tetramolopium rockii var. calcisabulorum | Asteraceae
|
| LUCA16 | Luteidiscus capillaris (Gaud.) St. John | Tetramolopium capillare | Asteraceae
|
| LURO4 | Luteidiscus rockii (Sherff) St. John | Tetramolopium rockii var. rockii | Asteraceae
|
| LUAL17 | Luziola alabamensis Chapman | Luziola bahiensis | Poaceae
|
| LUBA2 | Luziola bahiensis (Steud.) A.S. Hitchc. | Brazilian watergrass | Poaceae
|
| LUFL2 | Luziola fluitans (Michx.) Terrell & H. Robins. | southern watergrass | Poaceae
|
| LUPE4 | Luziola peruviana Juss. ex J.F. Gmel. | Peruvian watergrass | Poaceae
|
| LUZIO | Luziola Juss. | watergrass | Poaceae
|
| LUACA | Luzula acuminata Raf. var. acuminata | hairy woodrush | Juncaceae
|
| LUACC | Luzula acuminata Raf. var. carolinae (S. Wats.) Fern. | Carolina woodrush | Juncaceae
|
| LUAC | Luzula acuminata Raf. | hairy woodrush | Juncaceae
|
| LUAL8 | Luzula alpinopilosa (Chaix) Breistr. | alpine woodrush | Juncaceae
|
| LUARA8 | Luzula arctica Blytt ssp. arctica | arctic woodrush | Juncaceae
|
| LUARL4 | Luzula arctica Blytt ssp. latifolia (Kjellm.) Porsild | wideleaf arctic woodrush | Juncaceae
|
| LUAR9 | Luzula arctica Blytt | arctic woodrush | Juncaceae
|
| LUARU | Luzula arcuata (Wahlenb.) Sw. ssp. unalaschcensis (Buch.) Hult�n | Alaska curved woodrush | Juncaceae
|
| LUARU4 | Luzula arcuata (Wahlenb.) Sw. var. unalaschcensis Buch. | Luzula arcuata ssp. unalaschcensis | Juncaceae
|
| LUAR5 | Luzula arcuata (Wahlenb.) Sw. | curved woodrush | Juncaceae
|
| LUBU | Luzula bulbosa (Wood) Smyth & Smyth | bulbous woodrush | Juncaceae
|
| LUCAB2 | Luzula campestris (L.) DC. var. bulbosa Wood | Luzula bulbosa | Juncaceae
|
| LUCAC6 | Luzula campestris (L.) DC. var. congesta (Thuill.) E. Mey. | Luzula congesta | Juncaceae
|
| LUCAE | Luzula campestris (L.) DC. var. echinata (Small) Fern. & Wieg. | Luzula echinata | Juncaceae
|
| LUCAF | Luzula campestris (L.) DC. var. frigida Buch. | Luzula multiflora ssp. frigida | Juncaceae
|
| LUCAM4 | Luzula campestris (L.) DC. var. macrantha (S. Wats.) Fern. & Wieg. | Luzula comosa | Juncaceae
|
| LUCAM2 | Luzula campestris (L.) DC. var. minor (Satake) Welsh | Luzula multiflora ssp. multiflora var. kobayasii | Juncaceae
|
| LUCAM3 | Luzula campestris (L.) DC. var. multiflora (Ehrh.) Celak. | Luzula multiflora ssp. multiflora var. multiflora | Juncaceae
|
| LUCAP | Luzula campestris (L.) DC. var. pallescens Wahlenb. | Luzula pallidula | Juncaceae
|
| LUCA2 | Luzula campestris (L.) DC. | field woodrush | Juncaceae
|
| LUCA5 | Luzula camtschadalorum (Samuelsson) Gorodk. ex Krylov | Luzula arctica ssp. latifolia | Juncaceae
|
| LUCAS2 | Luzula carolinae S. Wats. var. saltuensis (Fern.) Fern. | Luzula acuminata var. acuminata | Juncaceae
|
| LUCA6 | Luzula carolinae S. Wats. | Luzula acuminata var. carolinae | Juncaceae
|
| LUCOC2 | Luzula comosa E. Mey. var. congesta (Thuill.) S. Wats. | Luzula congesta | Juncaceae
|
| LUCOL | Luzula comosa E. Mey. var. laxa Buch. | Luzula comosa | Juncaceae
|
| LUCOM | Luzula comosa E. Mey. var. macrantha S. Wats. | Luzula comosa | Juncaceae
|
| LUCOS3 | Luzula comosa E. Mey. var. subsessilis S. Wats. | Luzula comosa | Juncaceae
|
| LUCO6 | Luzula comosa E. Mey. | Pacific woodrush | Juncaceae
|
| LUCO5 | Luzula confusa Lindeberg | northern woodrush | Juncaceae
|
| LUCO8 | Luzula congesta (Thuill.) Lej. | heath woodrush | Juncaceae
|
| LUDI | Luzula divaricata S. Wats. | forked woodrush | Juncaceae
|