| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| LICAC8 | Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM. var. caroliniense | Carolina puccoon | Boraginaceae
|
| LICAC9 | Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM. var. croceum (Fern.) Cronq. | Carolina puccoon | Boraginaceae
|
| LICA13 | Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM. | Carolina puccoon | Boraginaceae
|
| LICO7 | Lithospermum cobrense Greene | smooththroat stoneseed | Boraginaceae
|
| LICO9 | Lithospermum confine I.M. Johnston | Arizona stoneseed | Boraginaceae
|
| LICR4 | Lithospermum croceum Fern. | Lithospermum caroliniense var. croceum | Boraginaceae
|
| LIER | Lithospermum erythrorhizon Siebold & Zucc. | lithospermum | Boraginaceae
|
| LIIN2 | Lithospermum incisum Lehm. | narrowleaf stoneseed | Boraginaceae
|
| LILA2 | Lithospermum latifolium Michx. | American stoneseed | Boraginaceae
|
| LILI8 | Lithospermum linearifolium Goldie | Lithospermum incisum | Boraginaceae
|
| LIMA14 | Lithospermum mandanense Spreng. | Lithospermum incisum | Boraginaceae
|
| LIMA5 | Lithospermum matamorense DC. | rough stoneseed | Boraginaceae
|
| LIMI3 | Lithospermum mirabile Small | San Antonio stoneseed | Boraginaceae
|
| LIMU3 | Lithospermum multiflorum Torr. ex Gray | manyflowered stoneseed | Boraginaceae
|
| LIOB5 | Lithospermum obtusifolium I.M. Johnston | roundleaf stoneseed | Boraginaceae
|
| LIOF | Lithospermum officinale L. | European stoneseed | Boraginaceae
|
| LIPAP | Lithospermum parksii I.M. Johnston var. parksii | Parks' stoneseed | Boraginaceae
|
| LIPAR2 | Lithospermum parksii I.M. Johnston var. rugulosum I.M. Johnston | Parks' stoneseed | Boraginaceae
|
| LIPA6 | Lithospermum parksii I.M. Johnston | Parks' stoneseed | Boraginaceae
|
| LIPI6 | Lithospermum pilosum Nutt. | Lithospermum ruderale | Boraginaceae
|
| LIRU4 | Lithospermum ruderale Dougl. ex Lehm. | western stoneseed | Boraginaceae
|
| LITU2 | Lithospermum tuberosum Rugel ex DC. | tuberous stoneseed | Boraginaceae
|
| LIVI2 | Lithospermum viride Greene | green stoneseed | Boraginaceae
|
| LITHO3 | Lithospermum L. | stoneseed | Boraginaceae
|
| LIHY2 | Lithothelium hyalosporum (Nyl.) Aptroot | | Pyrenulaceae
|
| LIIL | Lithothelium illotum (Nyl.) Aptroot | | Pyrenulaceae
|
| LIMA16 | Lithothelium macrosporum (R. C. Harris) Aptroot | | Pyrenulaceae
|
| LIMI15 | Lithothelium microsporum R. C. Harris | | Pyrenulaceae
|
| LIPH5 | Lithothelium phaeosporum (R. C. Harris) Aptroot | | Pyrenulaceae
|
| LISE8 | Lithothelium septemseptatum (R. C. Harris) Aptroot | | Pyrenulaceae
|
| LITHO6 | Lithothelium Mull. Arg. | lithothelium | Pyrenulaceae
|
| LIMO4 | Lithrea molleoides (Vell.) Engl. | aroeira blanca | Anacardiaceae
|
| LITHR | Lithrea Miers ex Hook. & Arn. | lithrea | Anacardiaceae
|
| LICA19 | Litrisa carnosa Small | Carphephorus carnosus | Asteraceae
|
| LIAE | Litsea aestivalis (L.) Fern. | pondspice | Lauraceae
|
| LICU2 | Litsea cubeba (Lour.) Pers. | litsea | Lauraceae
|
| LITSE | Litsea Lam. | litsea | Lauraceae
|
| LIAM3 | Littorella americana Fern. | Littorella uniflora | Plantaginaceae
|
| LIUNA | Littorella uniflora (L.) Aschers. var. americana (Fern.) Gleason | Littorella uniflora | Plantaginaceae
|
| LIUN | Littorella uniflora (L.) Aschers. | American shoreweed | Plantaginaceae
|
| LITTO | Littorella Berg. | littorella | Plantaginaceae
|
| LICH3 | Livistona chinensis (Jacq.) R. Br. ex Mart. | fountain palm | Arecaceae
|
| LIOL | Livistona oliviformis (Hassk.) Mart. | Livistona chinensis | Arecaceae
|
| LIVIS | Livistona R. Br. | livistona | Arecaceae
|
| LLNE | Llimoniella neglecta (Vainio) Triebel & Rambold | | Leotiaceae
|
| LLIMO | Llimoniella Hafeller & Nav.-Ros. | llimoniella | Leotiaceae
|
| LLSE | Lloydia serotina (L.) Reichenb. | common alplily | Liliaceae
|
| LLOYD | Lloydia Salisb. ex Reichenb. | alplily | Liliaceae
|
| LOHA60 | Lobaria hallii (Tuck.) Zahlbr. | Hall's lung lichen | Lobariaceae
|
| LOKU2 | Lobaria kurokawae Yoshim. | lung lichen | Lobariaceae
|
| LOLI60 | Lobaria linita (Ach.) Rabenh. | lung lichen | Lobariaceae
|
| LOOR60 | Lobaria oregana (Tuck.) Mull. Arg. | Oregon lung lichen | Lobariaceae
|
| LOPS | Lobaria pseudopulmonaria Gyelnik | lung lichen | Lobariaceae
|
| LOPU60 | Lobaria pulmonaria (L.) Hoffm. | lung lichen | Lobariaceae
|
| LOQU4 | Lobaria quercizans Michaux | lung lichen | Lobariaceae
|
| LORA3 | Lobaria ravenelii (Tuck.) Yoshim. | Ravenel's lung lichen | Lobariaceae
|
| LORE7 | Lobaria retigera (Bory) Trevisan | lung lichen | Lobariaceae
|
| LOSC60 | Lobaria scrobiculata (Scop.) DC. | lung lichen | Lobariaceae
|
| LOTE7 | Lobaria tenuis Vainio | lung lichen | Lobariaceae
|
| LOBAR2 | Lobaria Schreber | lung lichen | Lobariaceae
|
| LOAMA | Lobelia amoena Michx. var. amoena | southern lobelia | Campanulaceae
|
| LOAMG | Lobelia amoena Michx. var. glandulifera Gray | southern lobelia | Campanulaceae
|
| LOAM4 | Lobelia amoena Michx. | southern lobelia | Campanulaceae
|
| LOAN | Lobelia anatina F. Wimmer | Apache lobelia | Campanulaceae
|
| LOAPA | Lobelia appendiculata A. DC. var. appendiculata | pale lobelia | Campanulaceae
|
| LOAPG | Lobelia appendiculata A. DC. var. gattingeri (Gray) McVaugh | Gattinger's lobelia | Campanulaceae
|
| LOAP | Lobelia appendiculata A. DC. | pale lobelia | Campanulaceae
|
| LOASP | Lobelia assurgens L. var. portoricensis (A. DC.) Urban | Lobelia robusta var. portoricensis | Campanulaceae
|
| LOBEB2 | Lobelia berlandieri A. DC. var. berlandieri | Berlandier's lobelia | Campanulaceae
|
| LOBEB | Lobelia berlandieri A. DC. var. brachypoda (Gray) McVaugh | Berlandier's lobelia | Campanulaceae
|
| LOBE3 | Lobelia berlandieri A. DC. | Berlandier's lobelia | Campanulaceae
|
| LOBO | Lobelia boykinii Torr. & Gray ex A. DC. | Boykin's lobelia | Campanulaceae
|
| LOBR4 | Lobelia brachypoda (Gray) A. DC. ex Small | Lobelia berlandieri var. brachypoda | Campanulaceae
|
| LOBR5 | Lobelia bracteata Small | Lobelia spicata var. spicata | Campanulaceae
|
| LOBR3 | Lobelia brevifolia Nutt. ex A. DC. | shortleaf lobelia | Campanulaceae
|
| LOCA | Lobelia canbyi Gray | Canby's lobelia | Campanulaceae
|
| LOCAG2 | Lobelia cardinalis L. ssp. graminea (Lam.) McVaugh | Lobelia cardinalis | Campanulaceae
|
| LOCAG5 | Lobelia cardinalis L. var. graminea (Lam.) McVaugh | Lobelia cardinalis | Campanulaceae
|
| LOCAM3 | Lobelia cardinalis L. var. meridionalis Bowden | Lobelia cardinalis | Campanulaceae
|
| LOCAM | Lobelia cardinalis L. var. multiflora (Paxton) McVaugh | Lobelia cardinalis | Campanulaceae
|
| LOCAP5 | Lobelia cardinalis L. var. phyllostachya (Engelm.) McVaugh | Lobelia cardinalis | Campanulaceae
|
| LOCAP6 | Lobelia cardinalis L. var. propinqua (Paxton) Bowden | Lobelia cardinalis | Campanulaceae
|
| LOCAP4 | Lobelia cardinalis L. var. pseudosplendens McVaugh | Lobelia cardinalis | Campanulaceae
|
| LOCA2 | Lobelia cardinalis L. | cardinalflower | Campanulaceae
|
| LOCH4 | Lobelia chinensis Lour. | Chinese lobelia | Campanulaceae
|
| LOCL | Lobelia cliffortiana L. | cardenala azul | Campanulaceae
|
| LOCO7 | Lobelia costata F. Wimmer | Lobelia dunbarii ssp. paniculata | Campanulaceae
|
| LODO | Lobelia dortmanna L. | Dortmann's cardinalflower | Campanulaceae
|
| LODUD3 | Lobelia dunbarii Rock ssp. dunbarii | Waihanau lobelia | Campanulaceae
|
| LODUP2 | Lobelia dunbarii Rock ssp. paniculata (Rock) Lammers | Waihanau lobelia | Campanulaceae
|
| LODU2 | Lobelia dunbarii Rock | Waihanau lobelia | Campanulaceae
|
| LODUD4 | Lobelia dunnii Greene var. dunnii | Dunn's lobelia | Campanulaceae
|
| LODUS2 | Lobelia dunnii Greene var. serrata (Gray) McVaugh | Dunn's lobelia | Campanulaceae
|
| LODU | Lobelia dunnii Greene | Dunn's lobelia | Campanulaceae
|
| LOEL | Lobelia elongata Small | longleaf lobelia | Campanulaceae
|
| LOER5 | Lobelia erinoides L. | Lobelia erinus | Campanulaceae
|
| LOER | Lobelia erinus L. | edging lobelia | Campanulaceae
|
| LOFE2 | Lobelia feayana Gray | bay lobelia | Campanulaceae
|
| LOFE | Lobelia fenestralis Cav. | fringeleaf lobelia | Campanulaceae
|
| LOFL2 | Lobelia flaccidifolia Small | foldear lobelia | Campanulaceae
|
| LOFL3 | Lobelia floridana Chapman | Florida lobelia | Campanulaceae
|