| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| LIWA3 | Lipochaeta warshauerii St. John | Lipochaeta lavarum | Asteraceae
|
| LIPOC2 | Lipochaeta DC. | nehe | Asteraceae
|
| LIAL | Lippia alba (P. Mill.) N.E. Br. ex Britt. & Wilson | bushy lippia | Verbenaceae
|
| LICA30 | Lippia canescens Kunth | Phyla nodiflora | Verbenaceae
|
| LICI2 | Lippia citriodora Kunth | Aloysia triphylla | Verbenaceae
|
| LICI3 | Lippia citrodora (Lam.) Kunth | Aloysia triphylla | Verbenaceae
|
| LICU | Lippia cuneifolia (Torr.) Steud. | Phyla cuneifolia | Verbenaceae
|
| LIDU3 | Lippia dulcis Trev. | Phyla scaberrima | Verbenaceae
|
| LIGE2 | Lippia geminata Kunth | Lippia alba | Verbenaceae
|
| LIGR6 | Lippia graveolens Kunth | Mexican oregano | Verbenaceae
|
| LIHE4 | Lippia helleri Britt. | Lippia micromera var. helleri | Verbenaceae
|
| LIIN6 | Lippia incisa (Small) Tidestrom | Phyla nodiflora | Verbenaceae
|
| LILAR | Lippia lanceolata Michx. var. recognita Fern. & Grisc. | Phyla lanceolata | Verbenaceae
|
| LILA10 | Lippia lanceolata Michx. | Phyla lanceolata | Verbenaceae
|
| LILI9 | Lippia ligustrina of authors | Aloysia gratissima | Verbenaceae
|
| LILY | Lippia lycioides (Cham.) Steud. | Aloysia gratissima var. gratissima | Verbenaceae
|
| LIMIH | Lippia micromera Schauer var. helleri (Britt.) Moldenke | Spanish thyme | Verbenaceae
|
| LIMI6 | Lippia micromera Schauer | Spanish thyme | Verbenaceae
|
| LIMO7 | Lippia montevidensis Spreng. | Lantana montevidensis | Verbenaceae
|
| LINOC2 | Lippia nodiflora (L.) Michx. var. canescens (Kunth) Kuntze | Phyla nodiflora | Verbenaceae
|
| LINOR | Lippia nodiflora (L.) Michx. var. reptans (Kunth) Kuntze | Phyla nodiflora | Verbenaceae
|
| LINOR2 | Lippia nodiflora (L.) Michx. var. rosea (D. Don) Munz | Phyla nodiflora | Verbenaceae
|
| LINO2 | Lippia nodiflora (L.) Michx. | Phyla nodiflora | Verbenaceae
|
| LIRE9 | Lippia reptans Kunth | Phyla nodiflora | Verbenaceae
|
| LIST9 | Lippia stoechadifolia (L.) Kunth | Phyla stoechadifolia | Verbenaceae
|
| LIST11 | Lippia strigulosa Mart. & Gal. | Phyla strigulosa var. strigulosa | Verbenaceae
|
| LITR7 | Lippia triphylla (L'Her.) Kuntze | Aloysia triphylla | Verbenaceae
|
| LIWR2 | Lippia wrightii Gray ex Torr. | Aloysia wrightii | Verbenaceae
|
| LIPPI | Lippia L. | lippia | Verbenaceae
|
| LIOR2 | Liquidambar orientalis Miller | Oriental sweetgum | Hamamelidaceae
|
| LIST2 | Liquidambar styraciflua L. | sweetgum | Hamamelidaceae
|
| LIQUI | Liquidambar L. | sweetgum | Hamamelidaceae
|
| LICH6 | Liriodendron chinense (Hemsl.) Sarg. | Chinese tuliptree | Magnoliaceae
|
| LITU | Liriodendron tulipifera L. | tuliptree | Magnoliaceae
|
| LIRIO | Liriodendron L. | tuliptree | Magnoliaceae
|
| LIMU6 | Liriope muscari (Dcne.) Bailey | big blue lilyturf | Liliaceae
|
| LISP8 | Liriope spicatum Lour. | creeping lilyturf | Liliaceae
|
| LIRIO2 | Liriope Lour. | lilyturf | Liliaceae
|
| LILA4 | Lisianthius laxiflorus Urban | campanilla amarilla | Gentianaceae
|
| LISIA | Lisianthius P. Br. | lisianthius | Gentianaceae
|
| LIAU2 | Listera auriculata Wieg. | auricled twayblade | Orchidaceae
|
| LIAU3 | Listera australis Lindl. | southern twayblade | Orchidaceae
|
| LIBA3 | Listera banksiana auct. non Lindl. | Listera caurina | Orchidaceae
|
| LIBO4 | Listera borealis Morong | northern twayblade | Orchidaceae
|
| LICA10 | Listera caurina Piper | northwestern twayblade | Orchidaceae
|
| LICO5 | Listera convallarioides (Sw.) Nutt. ex Ell. | broadlipped twayblade | Orchidaceae
|
| LICON2 | Listera cordata (L.) R. Br. ex Ait. f. ssp. nephrophylla (Rydb.) A.& D. L�ve | Listera cordata var. nephrophylla | Orchidaceae
|
| LICOC2 | Listera cordata (L.) R. Br. ex Ait. f. var. cordata | heartleaf twayblade | Orchidaceae
|
| LICON | Listera cordata (L.) R. Br. ex Ait. f. var. nephrophylla (Rydb.) Hult�n | heartleaf twayblade | Orchidaceae
|
| LICO6 | Listera cordata (L.) R. Br. ex Ait. f. | heartleaf twayblade | Orchidaceae
|
| LINE5 | Listera nephrophylla Rydb. | Listera cordata var. nephrophylla | Orchidaceae
|
| LISM | Listera smallii Wieg. | kidneyleaf twayblade | Orchidaceae
|
| LIVE4 | Listera �veltmanii Case | | Orchidaceae
|
| LISTE | Listera R. Br. ex Ait. f. | twayblade | Orchidaceae
|
| LICH4 | Litchi chinensis Sonn. | lychee | Sapindaceae
|
| LITCH | Litchi Sonn. | lychee | Sapindaceae
|
| LIPA7 | Lithachne pauciflora (Sw.) Beauv. ex Poir. | diente de perro | Poaceae
|
| LITHA | Lithachne Beauv. | diente de perro | Poaceae
|
| LIDED2 | Lithocarpus densiflorus (Hook. & Arn.) Rehd. var. densiflorus | tanoak | Fagaceae
|
| LIDEE | Lithocarpus densiflorus (Hook. & Arn.) Rehd. var. echinoides (R. Br.) Abrams | tanoak | Fagaceae
|
| LIDE3 | Lithocarpus densiflorus (Hook. & Arn.) Rehd. | tanoak | Fagaceae
|
| LITHO | Lithocarpus Blume | tanoak | Fagaceae
|
| LITE10 | Lithococca tenella (Nutt.) Small | Heliotropium tenellum | Boraginaceae
|
| LITE12 | Lithographa tesserata (DC.) Nyl. | | Rimulariaceae
|
| LITHO5 | Lithographa Nyl. | lithographa | Rimulariaceae
|
| LIMU4 | Lithophila muscoides Sw. | talustuft | Amaranthaceae
|
| LIVE7 | Lithophila vermicularis (L.) Uline ex Millsp. | Blutaparon vermiculare | Amaranthaceae
|
| LITHO4 | Lithophila Sw. | lithophila | Amaranthaceae
|
| LIAFA | Lithophragma affine Gray ssp. affine | San Francisco woodland-star | Saxifragaceae
|
| LIAFM | Lithophragma affine Gray ssp. mixtum R.L. Taylor | San Francisco woodland-star | Saxifragaceae
|
| LIAF | Lithophragma affine Gray | San Francisco woodland-star | Saxifragaceae
|
| LIAU8 | Lithophragma australe Rydb. | Lithophragma tenellum | Saxifragaceae
|
| LIBO5 | Lithophragma bolanderi Gray | Bolander's woodland-star | Saxifragaceae
|
| LIBR8 | Lithophragma brevilobum Rydb. | Lithophragma tenellum | Saxifragaceae
|
| LIBU2 | Lithophragma bulbiferum Rydb. | Lithophragma glabrum | Saxifragaceae
|
| LICA21 | Lithophragma campanulatum T.J. Howell | Siskiyou Mountain woodland-star | Saxifragaceae
|
| LICY3 | Lithophragma cymbalaria Torr. & Gray | mission woodland-star | Saxifragaceae
|
| LIGLB | Lithophragma glabrum Nutt. var. bulbiferum (Rydb.) Jepson | Lithophragma glabrum | Saxifragaceae
|
| LIGLR | Lithophragma glabrum Nutt. var. ramulosum (Suksdorf) Boivin | Lithophragma glabrum | Saxifragaceae
|
| LIGL2 | Lithophragma glabrum Nutt. | bulbous woodland-star | Saxifragaceae
|
| LIHEC | Lithophragma heterophyllum (Hook. & Arn.) Torr. & Gray var. campanulatum (T.J. Howell) M.E. Peck | Lithophragma campanulatum | Saxifragaceae
|
| LIHE | Lithophragma heterophyllum (Hook. & Arn.) Torr. & Gray | hillside woodland-star | Saxifragaceae
|
| LIMA6 | Lithophragma maximum Bacig. | San Clemente Island woodland-star | Saxifragaceae
|
| LIPAP3 | Lithophragma parviflorum (Hook.) Nutt. ex Torr. & Gray var. parviflorum | smallflower woodland-star | Saxifragaceae
|
| LIPAT | Lithophragma parviflorum (Hook.) Nutt. ex Torr. & Gray var. trifoliatum (Eastw.) Jepson | prairie woodland-star | Saxifragaceae
|
| LIPA5 | Lithophragma parviflorum (Hook.) Nutt. ex Torr. & Gray | smallflower woodland-star | Saxifragaceae
|
| LIRU3 | Lithophragma rupicola Greene | Lithophragma tenellum | Saxifragaceae
|
| LISCP | Lithophragma scabrellum (Greene) Greene var. peirsonii Jepson | Lithophragma bolanderi | Saxifragaceae
|
| LISC6 | Lithophragma scabrellum (Greene) Greene | Lithophragma bolanderi | Saxifragaceae
|
| LITET | Lithophragma tenellum Nutt. var. thompsonii (Hoover) C.L. Hitchc. | Lithophragma tenellum | Saxifragaceae
|
| LITE4 | Lithophragma tenellum Nutt. | slender woodland-star | Saxifragaceae
|
| LITR2 | Lithophragma trifoliatum Eastw. | Lithophragma parviflorum var. trifoliatum | Saxifragaceae
|
| LITR6 | Lithophragma tripartitum Greene | Lithophragma affine ssp. mixtum | Saxifragaceae
|
| LITHO2 | Lithophragma (Nutt.) Torr. & Gray | woodland-star | Saxifragaceae
|
| LIAN6 | Lithospermum angustifolium Michx. | Lithospermum incisum | Boraginaceae
|
| LIAR4 | Lithospermum arvense L. | Buglossoides arvensis | Boraginaceae
|
| LICA11 | Lithospermum californicum Gray | California stoneseed | Boraginaceae
|
| LICA18 | Lithospermum calycosum (J.F. Macbr.) I.M. Johnston | Chinati stoneseed | Boraginaceae
|
| LICA12 | Lithospermum canescens (Michx.) Lehm. | hoary puccoon | Boraginaceae
|
| LICA27 | Lithospermum carolinianum Lam. | Lithospermum caroliniense var. caroliniense | Boraginaceae
|
| LICA29 | Lithospermum carolinianum auct. non Lam. | Onosmodium molle ssp. hispidissimum | Boraginaceae
|