| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| LOTE | Loeflingia texana Hook. | Loeflingia squarrosa ssp. squarrosa | Caryophyllaceae
|
| LOEFL | Loeflingia L. | loeflingia | Caryophyllaceae
|
| LOEF | Loeselia effusa Gray | Ipomopsis effusa | Polemoniaceae
|
| LOGL3 | Loeselia glandulosa (Cav.) G. Don | glandular false calico | Polemoniaceae
|
| LOGR8 | Loeselia greggii S. Wats. | Chisos Mountain false calico | Polemoniaceae
|
| LOMA7 | Loeselia matthewsii Gray | Loeseliastrum matthewsii | Polemoniaceae
|
| LOSC4 | Loeselia scariosa (Mart. & Gal.) Walp. | Loeselia greggii | Polemoniaceae
|
| LOTE6 | Loeselia tenuifolia Gray | Ipomopsis tenuifolia | Polemoniaceae
|
| LOESE | Loeselia L. | false calico | Polemoniaceae
|
| LOMA10 | Loeseliastrum matthewsii (Gray) Timbrook | desert calico | Polemoniaceae
|
| LOSC6 | Loeseliastrum schottii (Torr.) Timbrook | Schott's calico | Polemoniaceae
|
| LOESE2 | Loeseliastrum (Brand) Timbrook | calico | Polemoniaceae
|
| LOBR7 | Loeskeobryum brevirostre (Brid.) Fleisch. in Broth. | loeskeobryum moss | Hylocomiaceae
|
| LOESK2 | Loeskeobryum Fleisch. in Broth. | loeskeobryum moss | Hylocomiaceae
|
| LOBA70 | Loeskypnum badium (Hartm.) Paul | loeskypnum moss | Amblystegiaceae
|
| LOWI2 | Loeskypnum wickesiae (Grout) Tuom. | Wickes' loeskypnum moss | Amblystegiaceae
|
| LOESK3 | Loeskypnum Paul | loeskypnum moss | Amblystegiaceae
|
| LOAR5 | Logfia arvensis (L.) Holub | field cottonrose | Asteraceae
|
| LOGA2 | Logfia gallica (L.) Coss. & Germ. | narrowleaf cottonrose | Asteraceae
|
| LOMI4 | Logfia minima (Sm.) Dumort. | little cottonrose | Asteraceae
|
| LOGFI2 | Logfia Cass. | cottonrose | Asteraceae
|
| LOPR | Loiseleuria procumbens (L.) Desv. | alpine azalea | Ericaceae
|
| LOISE | Loiseleuria Desv. | loiseleuria | Ericaceae
|
| LOAR10 | Lolium arundinaceum (Schreb.) S.J. Darbyshire | tall fescue | Poaceae
|
| LOAR6 | Lolium arvense With. | Lolium temulentum | Poaceae
|
| LODOL | Lolium dorei Boivin var. laeve Boivin | Lolium persicum | Poaceae
|
| LODO4 | Lolium dorei Boivin | Lolium persicum | Poaceae
|
| LOFE5 | Lolium �festucaceum Link | | Poaceae
|
| LOGI2 | Lolium giganteum (L.) S.J. Darbyshire | giant fescue | Poaceae
|
| LOLO2 | Lolium loliaceum (Bory & Chaubard) Hand.-Maz. | Lolium rigidum | Poaceae
|
| LOMUD | Lolium multiflorum Lam. var. diminutum Mutel | Lolium perenne ssp. multiflorum | Poaceae
|
| LOMUM | Lolium multiflorum Lam. var. muticum DC. | Lolium perenne ssp. multiflorum | Poaceae
|
| LOMUR | Lolium multiflorum Lam. var. ramosum Guss. ex Arcang. | Lolium perenne ssp. perenne | Poaceae
|
| LOMU | Lolium multiflorum Lam. | Lolium perenne ssp. multiflorum | Poaceae
|
| LOPEM2 | Lolium perenne L. ssp. multiflorum (Lam.) Husnot | Italian ryegrass | Poaceae
|
| LOPEP | Lolium perenne L. ssp. perenne | perennial ryegrass | Poaceae
|
| LOPER | Lolium perenne L. ssp. rigidum (Gaudin) A.& D. L�ve | Lolium rigidum | Poaceae
|
| LOPEA | Lolium perenne L. var. aristatum Willd. | Lolium perenne ssp. multiflorum | Poaceae
|
| LOPEC | Lolium perenne L. var. cristatum Pers. ex B.D. Jackson | Lolium perenne ssp. perenne | Poaceae
|
| LOPEM | Lolium perenne L. var. multiflorum (Lam.) Parnell | Lolium perenne ssp. multiflorum | Poaceae
|
| LOPE | Lolium perenne L. | perennial ryegrass | Poaceae
|
| LOPE2 | Lolium persicum Boiss. & Hohen. ex Boiss. | Persian ryegrass | Poaceae
|
| LOPR7 | Lolium pratense (Huds.) S.J. Darbyshire | meadow ryegrass | Poaceae
|
| LORIL | Lolium rigidum Gaudin ssp. lepturoides (Boiss.) Sennen & Mauricio | Lolium rigidum | Poaceae
|
| LORI | Lolium rigidum Gaudin | Wimmera ryegrass | Poaceae
|
| LOST | Lolium strictum auct. non J. Presl | Lolium rigidum | Poaceae
|
| LOSU | Lolium subulatum Vis. | Lolium rigidum | Poaceae
|
| LOTEA | Lolium temulentum L. var. arvense (With.) Lilja | Lolium temulentum | Poaceae
|
| LOTEL | Lolium temulentum L. var. leptochaeton A. Braun | Lolium temulentum | Poaceae
|
| LOTEM | Lolium temulentum L. var. macrochaeton A. Braun | Lolium temulentum | Poaceae
|
| LOTE2 | Lolium temulentum L. | Darnel ryegrass | Poaceae
|
| LOLIU | Lolium L. | ryegrass | Poaceae
|
| LOGU | Lomagramma guianensis (Aubl.) Ching | Guiana fern | Dryopteridaceae
|
| LOMAG | Lomagramma J. Sm. | lomagramma | Dryopteridaceae
|
| LOSP4 | Lomaria spicant (L.) Desv. | Blechnum spicant | Blechnaceae
|
| LOTE5 | Lomaria tenuifolia Desv. | Stenochlaena tenuifolia | Blechnaceae
|
| LOAM2 | Lomariopsis amydrophlebia (Slosson ex Maxon) Holttum | royal fringedfern | Dryopteridaceae
|
| LOKU | Lomariopsis kunzeana (K. Presl ex Underwood) Holttum | hollyleaf fringedfern | Dryopteridaceae
|
| LOSO | Lomariopsis sorbifolia (L.) F�e | acacia fringedfern | Dryopteridaceae
|
| LOTE3 | Lomariopsis tenuifolia (Desv.) Christ | Stenochlaena tenuifolia | Blechnaceae
|
| LOMAR | Lomariopsis F�e | fringedfern | Dryopteridaceae
|
| LOAM | Lomatium ambiguum (Nutt.) Coult. & Rose | Wyeth biscuitroot | Apiaceae
|
| LOANF | Lomatium angustatum (Coult. & Rose) St. John var. flavum G.N. Jones | Lomatium martindalei | Apiaceae
|
| LOAN3 | Lomatium angustatum (Coult. & Rose) St. John | Lomatium martindalei | Apiaceae
|
| LOAN4 | Lomatium anomalum M.E. Jones ex Coult. & Rose | Lomatium triternatum var. anomalum | Apiaceae
|
| LOAT | Lomatium attenuatum Evert | tapertip desertparsley | Apiaceae
|
| LOAU5 | Lomatium austiniae (Coult. & Rose) Coult. & Rose | Austin desertparsley | Apiaceae
|
| LOBIB | Lomatium bicolor (S. Wats.) Coult. & Rose var. bicolor | Wasatch desertparsley | Apiaceae
|
| LOBIL | Lomatium bicolor (S. Wats.) Coult. & Rose var. leptocarpum (Torr. & Gray) Schlessman | Wasatch desertparsley | Apiaceae
|
| LOBI | Lomatium bicolor (S. Wats.) Coult. & Rose | Wasatch desertparsley | Apiaceae
|
| LOBR | Lomatium bradshawii (Rose ex Mathias) Mathias & Constance | Bradshaw's desertparsley | Apiaceae
|
| LOBR2 | Lomatium brandegeei (Coult. & Rose) J.F. Macbr. | Brandegee's desertparsley | Apiaceae
|
| LOBR6 | Lomatium brevifolium Coult. & Rose | Lomatium triternatum var. brevifolium | Apiaceae
|
| LOCA3 | Lomatium californicum (Nutt.) Mathias & Constance | California lomatium | Apiaceae
|
| LOCA4 | Lomatium canbyi (Coult. & Rose) Coult. & Rose | Canby's biscuitroot | Apiaceae
|
| LOCAC | Lomatium caruifolium (Hook. & Arn.) Coult. & Rose var. caruifolium | alkali desertparsley | Apiaceae
|
| LOCAD | Lomatium caruifolium (Hook. & Arn.) Coult. & Rose var. denticulatum (Jepson) Jepson | alkali desertparsley | Apiaceae
|
| LOCA5 | Lomatium caruifolium (Hook. & Arn.) Coult. & Rose | alkali desertparsley | Apiaceae
|
| LOCIH | Lomatium ciliolatum Jepson var. hooveri Mathias & Constance | Lomatium hooveri | Apiaceae
|
| LOCI | Lomatium ciliolatum Jepson | Yolla Bolly biscuitroot | Apiaceae
|
| LOCI4 | Lomatium circumdatum (S. Wats.) Coult. & Rose | Lomatium cous | Apiaceae
|
| LOCO | Lomatium columbianum Mathias & Constance | purple leptotaenia | Apiaceae
|
| LOCO2 | Lomatium concinnum (Osterhout) Mathias | adobe desertparsley | Apiaceae
|
| LOCO3 | Lomatium congdonii Coult. & Rose | Mariposa desertparsley | Apiaceae
|
| LOCO8 | Lomatium cookii J.S. Kagan | agate desertparsley | Apiaceae
|
| LOCO4 | Lomatium cous (S. Wats.) Coult. & Rose | cous biscuitroot | Apiaceae
|
| LOCU | Lomatium cusickii (S. Wats.) Coult. & Rose | Cusick's biscuitroot | Apiaceae
|
| LOCU2 | Lomatium cuspidatum Mathias & Constance | Wenatchee desertparsley | Apiaceae
|
| LODAD | Lomatium dasycarpum (Torr. & Gray) Coult. & Rose ssp. dasycarpum | woollyfruit desertparsley | Apiaceae
|
| LODAT | Lomatium dasycarpum (Torr. & Gray) Coult. & Rose ssp. tomentosum (Benth.) Theobald | woollyfruit desertparsley | Apiaceae
|
| LODA | Lomatium dasycarpum (Torr. & Gray) Coult. & Rose | woollyfruit desertparsley | Apiaceae
|
| LODA5 | Lomatium daucifolium (Torr. & Gray) Coult. & Rose | Lomatium foeniculaceum ssp. daucifolium | Apiaceae
|
| LODID2 | Lomatium dissectum (Nutt.) Mathias & Constance var. dissectum | fernleaf biscuitroot | Apiaceae
|
| LODIE | Lomatium dissectum (Nutt.) Mathias & Constance var. eatonii (Coult. & Rose) Cronq. | Lomatium dissectum var. multifidum | Apiaceae
|
| LODIM | Lomatium dissectum (Nutt.) Mathias & Constance var. multifidum (Nutt.) Mathias & Constance | carrotleaf biscuitroot | Apiaceae
|
| LODI | Lomatium dissectum (Nutt.) Mathias & Constance | fernleaf biscuitroot | Apiaceae
|
| LODO2 | Lomatium donnellii (Coult. & Rose) Coult. & Rose | Donnell's biscuitroot | Apiaceae
|
| LOEA | Lomatium eastwoodiae (Coult. & Rose) J.F. Macbr. | Eastwood's desertparsley | Apiaceae
|
| LOEN | Lomatium engelmannii Mathias | Engelmann's desertparsley | Apiaceae
|
| LOER2 | Lomatium erythrocarpum Meinke & Constance | redfruit desertparsley | Apiaceae
|
| LOFAF | Lomatium farinosum (Hook.) Coult. & Rose var. farinosum | northern biscuitroot | Apiaceae
|