| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| LEUT2 | Lecanora utahensis H. Magn. | Utah rim lichen | Lecanoraceae
|
| LEVA4 | Lecanora valesiaca (Mull. Arg.) Stizenb. | rim lichen | Lecanoraceae
|
| LEVA5 | Lecanora varia (Hoffm.) Ach. | rim lichen | Lecanoraceae
|
| LEVA6 | Lecanora variolascens auct. | Lecanora impudens | Lecanoraceae
|
| LEVE5 | Lecanora vegae Malme | rim lichen | Lecanoraceae
|
| LEVE7 | Lecanora verrucigera (Hue) Zahlbr. | Aspicilia verrucigera | Hymeneliaceae
|
| LEVE8 | Lecanora verrucosa (Ach.) Laurer | Megaspora verrucosa | Hymeneliaceae
|
| LEVE9 | Lecanora versicolor (Pers.) Ach. | Lecanora muralis var. versicolor | Lecanoraceae
|
| LEVI15 | Lecanora viriduloflava de Lesd. | rim lichen | Lecanoraceae
|
| LEWE | Lecanora weberi B. D. Ryan | Weber's rim lichen | Lecanoraceae
|
| LEWI | Lecanora willeyi Tuck. | Willey's rim lichen | Lecanoraceae
|
| LEWI2 | Lecanora wisconsinensis H. Magn. | Wisconsin rim lichen | Lecanoraceae
|
| LEXA | Lecanora xanthosora B. D. Ryan & Poelt | rim lichen | Lecanoraceae
|
| LEXY | Lecanora xylophila Hue | rim lichen | Lecanoraceae
|
| LEZO | Lecanora zosterae (Ach.) Nyl. | Zoster's rim lichen | Lecanoraceae
|
| LECAN4 | Lecanora Ach. | rim lichen | Lecanoraceae
|
| LESA18 | Lecanoropsis saligna (Schrader) Choisy | Lecanora saligna | Lecanoraceae
|
| LECE | Lechea cernua Small | nodding pinweed | Cistaceae
|
| LEDE4 | Lechea deckertii Small | Deckert's pinweed | Cistaceae
|
| LEDI | Lechea divaricata Shuttlw. ex Britt. | drysand pinweed | Cistaceae
|
| LEEX2 | Lechea exserta Small | Lechea sessiliflora | Cistaceae
|
| LEINI2 | Lechea intermedia Leggett ex Britt. var. intermedia | largepod pinweed | Cistaceae
|
| LEINJ | Lechea intermedia Leggett ex Britt. var. juniperina (Bickn.) B.L. Robins. | largepod pinweed | Cistaceae
|
| LEINL | Lechea intermedia Leggett ex Britt. var. laurentiana Hodgdon | largepod pinweed | Cistaceae
|
| LEIN | Lechea intermedia Leggett ex Britt. | largepod pinweed | Cistaceae
|
| LEJU | Lechea juniperina Bickn. | Lechea intermedia var. juniperina | Cistaceae
|
| LELA11 | Lechea lakelae Wilbur | Lakela's pinweed | Cistaceae
|
| LELEM | Lechea leggettii Britt. & Hollick var. moniliformis (Bickn.) Hodgdon | Lechea pulchella var. moniliformis | Cistaceae
|
| LELER | Lechea leggettii Britt. & Hollick var. ramosissima Hodgdon | Lechea pulchella var. pulchella | Cistaceae
|
| LELE | Lechea leggettii Britt. & Hollick | Lechea pulchella var. pulchella | Cistaceae
|
| LEMAM | Lechea maritima Leggett ex B.S.P. var. maritima | beach pinweed | Cistaceae
|
| LEMAV | Lechea maritima Leggett ex B.S.P. var. virginica Hodgdon | Virginia pinweed | Cistaceae
|
| LEMA | Lechea maritima Leggett ex B.S.P. | beach pinweed | Cistaceae
|
| LEME2 | Lechea mensalis Hodgdon | Chisos Mountain pinweed | Cistaceae
|
| LEMIM2 | Lechea minor L. var. maritima (Leggett ex B.S.P.) Gray | Lechea maritima var. maritima | Cistaceae
|
| LEMIV | Lechea minor L. var. villosa (Ell.) Boivin | Lechea mucronata | Cistaceae
|
| LEMI | Lechea minor L. | thymeleaf pinweed | Cistaceae
|
| LEMO6 | Lechea moniliformis Bickn. | Lechea pulchella var. moniliformis | Cistaceae
|
| LEMU3 | Lechea mucronata Raf. | hairy pinweed | Cistaceae
|
| LEMY | Lechea myriophylla Small | Lechea deckertii | Cistaceae
|
| LEPA | Lechea patula Leggett | Lechea sessiliflora | Cistaceae
|
| LEPR4 | Lechea prismatica Small | Lechea sessiliflora | Cistaceae
|
| LEPUM | Lechea pulchella Raf. var. moniliformis (Bickn.) Seymour | Leggett's pinweed | Cistaceae
|
| LEPUP2 | Lechea pulchella Raf. var. pulchella | Leggett's pinweed | Cistaceae
|
| LEPU4 | Lechea pulchella Raf. | Leggett's pinweed | Cistaceae
|
| LERA | Lechea racemulosa Michx. | Illinois pinweed | Cistaceae
|
| LESA | Lechea san-sabeana (Buckl.) Hodgdon | San Saba pinweed | Cistaceae
|
| LESE7 | Lechea sessiliflora Raf. | pineland pinweed | Cistaceae
|
| LEST | Lechea stricta Leggett ex Britt. | prairie pinweed | Cistaceae
|
| LETEO | Lechea tenuifolia Michx. var. occidentalis Hodgdon | Lechea tenuifolia | Cistaceae
|
| LETE | Lechea tenuifolia Michx. | narrowleaf pinweed | Cistaceae
|
| LETOC | Lechea torreyi Leggett ex Britt. var. congesta Hodgdon | Lechea torreyi | Cistaceae
|
| LETO2 | Lechea torreyi Leggett ex Britt. | piedmont pinweed | Cistaceae
|
| LEVIM3 | Lechea villosa Ell. var. macrotheca Hodgdon | Lechea mucronata | Cistaceae
|
| LEVIS2 | Lechea villosa Ell. var. schaffneri Hodgdon | Lechea mucronata | Cistaceae
|
| LEVI | Lechea villosa Ell. | Lechea mucronata | Cistaceae
|
| LECHE | Lechea L. | pinweed | Cistaceae
|
| LEAB2 | Lecidea ablephora Nyl. | Ramonia ablephora | Gyalectaceae
|
| LEAC7 | Lecidea acrocyanea (Th. Fr.) H. Magn. | Lecidella patavina | Lecanoraceae
|
| LEAD3 | Lecidea adirondackii H. Magn. | Psilolechia clavulifera | Micareaceae
|
| LEAD | Lecidea admiscens Nyl. | | Lecideaceae
|
| LEAE3 | Lecidea aenea (Fr.) Nyl. | Miriquidica garovaglii | Lecanoraceae
|
| LEAE4 | Lecidea aeruginosa Borrer | Trapeliopsis flexuosa | Trapeliaceae
|
| LEAG2 | Lecidea aglaea Sommerf. | Tephromela aglaea | Bacidiaceae
|
| LEAG3 | Lecidea aglaeida Nyl. | Tephromela aglaeida | Bacidiaceae
|
| LEAH | Lecidea ahlesii (Korber) Nyl. | | Lecideaceae
|
| LEAI2 | Lecidea aitema Ach. | | Lecideaceae
|
| LEAL29 | Lecidea alaiensis Vainio | Lecidella patavina | Lecanoraceae
|
| LEAL37 | Lecidea alaskensis Nyl. | Herteliana alaskensis | Bacidiaceae
|
| LEAL30 | Lecidea albidocinerella (Vainio) Vainio | Lecidella effugiens | Lecanoraceae
|
| LEAL31 | Lecidea albocaerulescens (Wulfen) Ach. | Porpidia albocaerulescens | Porpidiaceae
|
| LEAL16 | Lecidea albofuscescens Nyl. | | Lecideaceae
|
| LEAL17 | Lecidea albohyalina (Nyl.) Th. Fr. | Biatora albohyalina | Bacidiaceae
|
| LEAL32 | Lecidea albosuffusa Th. Fr. | Farnoldia jurana | Porpidiaceae
|
| LEAL38 | Lecidea aleutica Degel. | Fuscidea lowensis | Fuscideaceae
|
| LEAL18 | Lecidea alpestris Sommerf. | | Lecideaceae
|
| LEAM4 | Lecidea amabilis de Lesd. | | Lecideaceae
|
| LEAM11 | Lecidea amaurospoda (Anzi) Vainio | | Lecideaceae
|
| LEAM5 | Lecidea amniculensis Lowe | | Lecideaceae
|
| LEAM7 | Lecidea amylacea Ach. | Lecanora marginata | Lecanoraceae
|
| LEAN12 | Lecidea aniptiza Stirton | Micarea denigrata | Micareaceae
|
| LEAN13 | Lecidea anthracophila Nyl. | Biatora anthracophila | Bacidiaceae
|
| LEAN14 | Lecidea antoniensis H. Magn. | Lecidea hassei | Lecideaceae
|
| LEAP5 | Lecidea apochroeiza Nyl. | Biatora subduplex | Bacidiaceae
|
| LEAR20 | Lecidea arctica Sommerf. | Frutidella caesioatra | Lecideaceae
|
| LEAR21 | Lecidea arctogena (Th. Fr.) H. Olivier | Tephromela testaceoatra | Bacidiaceae
|
| LEAR22 | Lecidea arcuatula (Arnold) Nyl. | Fuscidea recensa | Fuscideaceae
|
| LEAR23 | Lecidea armeniaca (DC.) Fr. | Tephromela armeniaca | Bacidiaceae
|
| LEAS | Lecidea assimilata Nyl. | Micarea assimilata | Micareaceae
|
| LEAS3 | Lecidea assimilis (Korber) Th. Fr. | Carbonea assimilis | Lecanoraceae
|
| LEAT2 | Lecidea atmoaria Th. Fr. | | Lecideaceae
|
| LEAT10 | Lecidea atrata (Ach.) Wahlenb. | Tremolecia atrata | Hymeneliaceae
|
| LEAT62 | Lecidea atrobrunnea (Raymond ex Lam. & DC.) Schaerer | | Lecideaceae
|
| LEAT3 | Lecidea atrofulva Sommerf. | Miriquidica atrofulva | Lecanoraceae
|
| LEAT11 | Lecidea atrofusca (Hepp) Mudd | Mycobilimbia hypnorum | Porpidiaceae
|
| LEAT12 | Lecidea atrolutescens Nyl. | Lecidea mannii | Lecideaceae
|
| LEAT4 | Lecidea atromarginata H. Magn. | | Lecideaceae
|
| LEAT13 | Lecidea atronivea Arnold | Carbonea atronivea | Lecanoraceae
|
| LEAT5 | Lecidea atroviridis (Arnold) Th. Fr. | | Lecideaceae
|
| LEAU7 | Lecidea auriculata Th. Fr. | | Lecideaceae
|
| LEBA3 | Lecidea baffiniana H. Magn. | | Lecideaceae
|