| Lotus hybr. | | a | |
| Lotus spp. | | a | |
| Lotus aboriginus Jeps. | | a | |
| Lotus aduncus (Griseb.) Nyman | | a | |
| Lotus aegaeus (Griseb.) Boiss. | | a | |
| Lotus alamosanus Rose | | a | |
| Lotus allionii Desv. | Lotus cytisoides L. | | |
| Lotus alpinus (Ser.) Schleich. ex Ramond | | a | |
| Lotus ambiguus Besser ex Spreng. | Lotus corniculatus L. | | |
| Lotus americanus (Nutt.) Bisch. | Lotus unifoliolatus (Hook.) Benth. var. unifoliolatus | | |
| Lotus angustissimus L. | | a | |
| Lotus angustissimus L. var. gracilis (Waldst. & Kit. ex Willd.) Asch. & Graebn. | Lotus angustissimus L. | | i |
| Lotus arabicus L. | | a | |
| Lotus arabicus L. var. torulosus Chiov. | Lotus torulosus (Chiov.) Fiori | | i |
| Lotus arborescens Lowe ex Cout. | | a | |
| Lotus arboreus G. Forst. | Carmichaelia arborea (G. Forst.) Druce | | |
| Lotus arenarius Brot. | | a | |
| Lotus argenteus Webb & Berthel. | Lotus polyphyllus E. D. Clarke | | |
| Lotus argophyllus (A. Gray) Greene | | a | |
| Lotus argophyllus (A. Gray) Greene var. adsurgens Dunkle | | a | i |
| Lotus argophyllus (A. Gray) Greene var. argenteus Dunkle | | a | i |
| Lotus argophyllus (A. Gray) Greene var. argophyllus | | a | i |
| Lotus argophyllus (A. Gray) Greene var. decorus (I. M. Johnst.) Ottley | Lotus argophyllus (A. Gray) Greene var. argophyllus | | i |
| Lotus argophyllus (A. Gray) Greene var. fremontii (A. Gray) Ottley | | a | i |
| Lotus argophyllus (A. Gray) Greene var. niveus (Greene) Ottley | | a | i |
| Lotus argophyllus (A. Gray) Greene var. ornithopus (Greene) Ottley | | a | i |
| Lotus argophyllus (A. Gray) Greene var. ornithopus auct., pro parte | Lotus argophyllus (A. Gray) Greene var. argenteus Dunkle | | i |
| Lotus argyraeus (Greene) Greene | | a | |
| Lotus argyraeus (Greene) Greene var. argyraeus | | a | i |
| Lotus argyraeus (Greene) Greene var. multicaulis (Ottley) Isely | | a | i |
| Lotus argyraeus (Greene) Greene var. notitius Isely | | a | i |
| Lotus argyrodes R. P. Murray | | a | |
| Lotus arvensis Pers. | Lotus corniculatus L. subsp. corniculatus var. corniculatus | | |
| Lotus assakensis Coss. ex Brand | | a | |
| Lotus aurantiacus Boiss. | Lotus arenarius Brot. | | |
| Lotus australis Andrews | | a | |
| Lotus balsamiferus (Kellogg) Greene | Lotus stipularis (Benth.) Greene var. stipularis | | |
| Lotus balticus Miniaev | Lotus corniculatus L. | | |
| Lotus benthamii Greene | | a | |
| Lotus berthelotii Lowe ex Masf. | | a | i |
| Lotus biflorus Desr. | | a | |
| Lotus biolettii Greene | Lotus junceus (Benth.) Greene var. biolettii (Greene) Ottley | | |
| Lotus bivoneus Fiori | Lotus conjugatus L. subsp. conjugatus | | |
| Lotus bollei Christ | Lotus purpureus Webb | | |
| Lotus borbasii Ujhelyi | | a | |
| Lotus borzii Pit. | Lotus emeroides R. P. Murray | | |
| Lotus brachycarpus Hochst. & Steud. ex A. Rich. | Lotus quinatus (Forssk.) J. B. Gillett var. brachycarpus (Hochst. & Steud. ex A. Rich.) J. B. Gillett | | |
| Lotus brandianus Harms | Lotus discolor E. Mey. | | |
| Lotus brunneri Webb | | a | |
| Lotus burttii Borsos | | a | |
| Lotus campylocladus Webb & Berthel. | | a | |
| Lotus capillipes Batt. & Trab. | Lotus jolyi Batt. | | |
| Lotus capitellatus Clos | Adesmia capitellata (Clos) Hauman | | |
| Lotus carmeli Boiss. | Lotus peregrinus L. var. carmeli (Boiss.) Post | | |
| Lotus carpetanus Lacaita | Lotus corniculatus L. | | |
| Lotus castellanus Boiss. & Reut. | | a | |
| Lotus caucasicus Kuprian. | Lotus corniculatus L. subsp. corniculatus var. corniculatus | | |
| Lotus chazaliei H. Boissieu | | a | |
| Lotus chihuahuanus (S. Watson) Greene | | a | |
| Lotus ciliatus Ten. | Lotus angustissimus L. | | |
| Lotus coccineus Schltdl. | | a | |
| Lotus coimbrensis Brot. ex Willd. | Lotus conimbricensis Brot. | | |
| Lotus collinus (Boiss.) Heldr. | | a | |
| Lotus commutatus Guss. | Lotus creticus L. | | |
| Lotus confinis Greene | Lotus grandiflorus (Benth.) Greene var. grandiflorus | | |
| Lotus conimbricensis Brot. | | a | |
| Lotus conjugatus L. | | a | |
| Lotus conjugatus L. subsp. conjugatus | | a | i |
| Lotus conjugatus L. subsp. requienii (Mauri ex Sanguin.) Greuter | | a | i |
| Lotus corniculatus L. | | a | |
| Lotus corniculatus L. subsp. corniculatus var. corniculatus | | a | i |
| Lotus corniculatus L. subsp. corniculatus var. hirsutus W. D. J. Koch | | a | i |
| Lotus corniculatus L. subsp. frondosus Freyn | Lotus tenuis Waldst. & Kit. ex Willd. | | i |
| Lotus corniculatus L. subsp. major (Scop.) Gams | Lotus corniculatus L. | | i |
| Lotus corniculatus L. subsp. preslii (Ten.) Ponert | Lotus preslii Ten. | | i |
| Lotus corniculatus L. subsp. slovacus Zertova | Lotus borbasii Ujhelyi | | i |
| Lotus corniculatus L. var. alpinus Ser. | Lotus alpinus (Ser.) Schleich. ex Ramond | | i |
| Lotus corniculatus L. var. arvensis (Pers.) Ser. | Lotus corniculatus L. subsp. corniculatus var. corniculatus | | i |
| Lotus corniculatus L. var. borealis Hyl. | | a | i |
| Lotus corniculatus L. var. carnosus Hartm. | | a | i |
| Lotus corniculatus L. var. ciliatus (Ten.) W. D. J. Koch | Lotus angustissimus L. | | i |
| Lotus corniculatus L. var. glaber Opiz | Lotus corniculatus L. subsp. corniculatus var. corniculatus | | i |
| Lotus corniculatus L. var. hirsutissimus Ledeb. | Lotus gebelia Vent. var. hirsutissimus (Ledeb.) Dinsm. | | i |
| Lotus corniculatus L. var. japonicus Regel | | a | i |
| Lotus corniculatus L. var. major (Scop.) Brand | Lotus corniculatus L. | | i |
| Lotus corniculatus L. var. stenodon Boiss. & Heldr. | Lotus stenodon (Boiss. & Heldr.) Heldr. | | i |
| Lotus corniculatus L. var. tenuifolius L. | Lotus tenuis Waldst. & Kit. ex Willd. | | i |
| Lotus coronillifolius Webb | Lotus purpureus Webb | | |
| Lotus crassifolius (Benth.) Greene | | a | |
| Lotus crassifolius (Benth.) Greene var. crassifolius | | a | i |
| Lotus crassifolius (Benth.) Greene var. otayensis Moran ex Isely | | a | i |
| Lotus crassifolius (Benth.) Greene var. subglaber (Ottley) C. L. Hitchc. | Lotus aboriginus Jeps. | | i |
| Lotus creticus L. | | a | |
| Lotus creticus L. var. collinus Boiss. | Lotus collinus (Boiss.) Heldr. | | i |
| Lotus creticus L. var. cytisoides (L.) Brand | Lotus cytisoides L. | | i |
| Lotus cruentus Court | | a | |
| Lotus cupreus Greene | Lotus oblongifolius (Benth.) Greene var. cupreus (Greene) Ottley | | |
| Lotus cytisoides L. | | a | |
| Lotus davidsonii Greene | Lotus nevadensis (S. Watson) Greene var. davidsonii (Greene) Isely | | |
| Lotus debilis M. E. Jones | Lotus alamosanus Rose | | |
| Lotus decumbens Poir. | Lotus uliginosus Schkuhr | | |
| Lotus decumbens T. F. Forst. | Lotus tenuis Waldst. & Kit. ex Willd. | | |
| Lotus delortii Timb.-Lagr. | | a | |
| Lotus dendroideus (Greene) Greene | | a | |
| Lotus dendroideus (Greene) Greene var. dendroideus | | a | i |
| Lotus dendroideus (Greene) Greene var. traskiae (Eastw. ex Abrams) Isely | | a | i |
| Lotus dendroideus (Greene) Greene var. veatchii (Greene) Isely | | a | i |
| Lotus denticulatus (Drew) Greene | | a | |
| Lotus digii Chrtkova | | a | |
| Lotus discolor E. Mey. | | a | |
| Lotus discolor E. Mey. subsp. mollis J. B. Gillett | | a | i |
| Lotus divaricatus Boiss. | Lotus macrotrichus Boiss. | | |
| Lotus divaricatus Sol. ex Buch | Lotus subbiflorus Lag. | | |
| Lotus dorycnium L. | Dorycnium pentaphyllum Scop. subsp. pentaphyllum | | |
| Lotus douglasii Greene | Lotus nevadensis (S. Watson) Greene var. douglasii (Greene) Ottley | | |
| Lotus drepanocarpus Durieu | | a | |
| Lotus dumetorum Webb ex R. P. Murray | | a | |
| Lotus dvinensis Miniaev & Ulle | | a | |
| Lotus edulis L. | | a | |
| Lotus elisabethae Opperman ex Wissjul. | | a | |
| Lotus emeroides R. P. Murray | | a | |
| Lotus eriophorus Greene | Lotus heermannii (Durand & Hilg.) Greene var. orbicularis (A. Gray) Isely | | |
| Lotus eriosolen (Maire) Mader & Podlech | | a | |
| Lotus erythrorhizus Bolle | Lotus glaucus Aiton var. erythrorhizus (Bolle) Brand | | |
| Lotus filicaulis Durieu | Lotus corniculatus L. subsp. corniculatus var. corniculatus | | |
| Lotus flexuosus Desr. | Lotus alpinus (Ser.) Schleich. ex Ramond | | |
| Lotus floridus (Lowe) Masf. | Lotus glaucus Aiton | | i |
| Lotus formosissimus Greene | | a | |
| Lotus fremontii (A. Gray) A. Heller | Lotus argophyllus (A. Gray) Greene var. fremontii (A. Gray) Ottley | | |
| Lotus frondosus (Freyn) Kuprian. | Lotus tenuis Waldst. & Kit. ex Willd. | | |
| Lotus fruticulosus Coss., nom. nud. | Kebirita roudairei (Bonnet) Kramina & D. D. Sokoloff | | |
| Lotus garcinii DC. | | a | |
| Lotus gebelia Vent. | | a | |
| Lotus gebelia Vent. var. anthylloides Boiss. | | a | i |
| Lotus gebelia Vent. var. gebelia | | a | i |
| Lotus gebelia Vent. var. hirsutissimus (Ledeb.) Dinsm. | | a | i |
| Lotus glaber Mill. | Lotus tenuis Waldst. & Kit. ex Willd. | | |
| Lotus glareosus Boiss. & Reut. | | a | |
| Lotus glaucus Aiton | | a | |
| Lotus glaucus Aiton var. erythrorhizus (Bolle) Brand | | a | i |
| Lotus glinoides Delile | | a | |
| Lotus goetzei Harms | | a | |
| Lotus gracilis Waldst. & Kit. ex Willd. | Lotus angustissimus L. | | |
| Lotus graecus L. | Dorycnium graecum (L.) Ser. | | |
| Lotus granadensis Zertova | Lotus pedunculatus Cav. | | |
| Lotus grandiflorus (Benth.) Greene | | a | |
| Lotus grandiflorus (Benth.) Greene var. grandiflorus | | a | i |
| Lotus grandiflorus (Benth.) Greene var. macranthus (Greene) Isely | | a | i |
| Lotus grandiflorus (Benth.) Greene var. mutabilis Ottley | Lotus grandiflorus (Benth.) Greene var. grandiflorus | | i |
| Lotus greenei Ottley ex Kearney & Peebles | | a | |
| Lotus halophilus Boiss. & Spruner | | a | |
| Lotus hamatus Greene | | a | |
| Lotus haydonii (Orcutt) Greene | | a | |
| Lotus hebranicus Hochst. ex Brand | Lotus lalambensis Schweinf. | | |
| Lotus heermannii (Durand & Hilg.) Greene | | a | |
| Lotus heermannii (Durand & Hilg.) Greene var. eriophorus (Greene) Ottley | Lotus heermannii (Durand & Hilg.) Greene var. orbicularis (A. Gray) Isely | | i |
| Lotus heermannii (Durand & Hilg.) Greene var. heermannii | | a | i |
| Lotus heermannii (Durand & Hilg.) Greene var. orbicularis (A. Gray) Isely | | a | i |
| Lotus helleri Britton | Lotus unifoliolatus (Hook.) Benth. var. helleri (Britton) Kartesz & Gandhi | | |
| Lotus hillebrandii Christ | | a | |
| Lotus hintoniorum B. L. Turner | | a | |
| Lotus hirsutus L. | Dorycnium hirsutum (L.) Ser. | | |
| Lotus hirtellus Greene | Lotus strigosus (Nutt.) Greene var. hirtellus (Greene) Ottley | | |
| Lotus hirtulus Lowe ex Cout. | Lotus purpureus Webb | | |
| Lotus hispidus Desf. ex DC. | Lotus parviflorus Desf. | | i |
| Lotus holosericeus Webb & Berthel. | | a | |
| Lotus humistratus Greene | | a | |
| Lotus incanus (Torr.) Greene | | a | |
| Lotus intricatus Eastw. | | a | |
| Lotus jacobaeus L. | | a | |
| Lotus jaegeri Harms | Lotus goetzei Harms | | |
| Lotus japonicus (Regel) K. Larsen | Lotus corniculatus L. var. japonicus Regel | | |
| Lotus jolyi Batt. | | a | |
| Lotus junceus (Benth.) Greene | | a | |
| Lotus junceus (Benth.) Greene var. biolettii (Greene) Ottley | | a | i |
| Lotus junceus (Benth.) Greene var. junceus | | a | i |
| Lotus komarovii Miniaev | Lotus corniculatus L. | | |
| Lotus krylovii Schischk. & Serg. | Lotus tenuis Waldst. & Kit. ex Willd. | | |
| Lotus kunkelii (Esteve) Bramwell & D. H. Davis | | a | |
| Lotus laciniata | | a | |
| Lotus lalambensis Schweinf. | | a | i |
| Lotus lamprocarpus Boiss. | Lotus palustris Willd. | | |
| Lotus lancerottensis Webb & Berthel. | | a | |
| Lotus lancerottensis Webb & Berthel. subsp. kunkelii Esteve | Lotus kunkelii (Esteve) Bramwell & D. H. Davis | | i |
| Lotus lanuginosus Vent. | | a | |
| Lotus latifolius Brand | Lotus oliveirae A. Chev. | | |
| Lotus leucophyllus Greene var. jepsonii Ottley | Lotus procumbens (Greene) Greene var. jepsonii (Ottley) Ottley | | i |
| Lotus libanoticus Boiss. | Lotus gebelia Vent. var. hirsutissimus (Ledeb.) Dinsm. | | |
| Lotus longibracteatus Rydb. | Lotus plebeius (Brandegee) Barneby | | |
| Lotus longisiliquosus R. Roem. | | a | |
| Lotus loweanus Webb & Berthel. | | a | |
| Lotus macbridei A. Nelson | Lotus tenuis Waldst. & Kit. ex Willd. | | |
| Lotus macranthus Lowe | | a | |
| Lotus macrotrichus Boiss. | | a | |
| Lotus maculatus Breitf. | | a | i |
| Lotus major Scop. | Lotus corniculatus L. | | |
| Lotus maritimus L. | | a | |
| Lotus maroccanus Ball | | a | |
| Lotus maroccanus Ball var. eriosolen Maire | Lotus eriosolen (Maire) Mader & Podlech | | i |
| Lotus mascaensis Burchard | | a | |
| Lotus mearnsii (Britton) Greene | | a | |
| Lotus medicaginoides Retz. | Medicago medicaginoides (Retz.) E. Small | | |
| Lotus michauxianus Ser. | Lotus gebelia Vent. var. hirsutissimus (Ledeb.) Dinsm. | | |
| Lotus micranthus Benth. | | a | |
| Lotus mollis Balf. f. | | a | i |
| Lotus mossamedensis Welw. ex Baker | Lotus arabicus L. | | |
| Lotus namulensis Brand | | a | |
| Lotus neoincanus Munz | Lotus incanus (Torr.) Greene | | |
| Lotus neomexicanus Greene | Lotus plebeius (Brandegee) Barneby | | |
| Lotus nevadensis (S. Watson) Greene | | a | |
| Lotus nevadensis (S. Watson) Greene var. davidsonii (Greene) Isely | | a | i |
| Lotus nevadensis (S. Watson) Greene var. douglasii (Greene) Ottley | | a | i |
| Lotus nevadensis (S. Watson) Greene var. nevadensis | | a | i |
| Lotus niveus (Greene) Greene | Lotus argophyllus (A. Gray) Greene var. niveus (Greene) Ottley | | |
| Lotus nubicus Hochst. ex Baker | | a | |
| Lotus nudiflorus (Nutt.) Greene | Lotus strigosus (Nutt.) Greene var. strigosus | | |
| Lotus nummularius (M. E. Jones) Tidestr. | Lotus plebeius (Brandegee) Barneby | | |
| Lotus nummularius Rchb. ex Steud., nom. nud. | Lotus uliginosus Schkuhr | | |
| Lotus nuttallianus Greene | | a | |
| Lotus oblongifolius (Benth.) Greene | | a | |
| Lotus oblongifolius (Benth.) Greene var. cupreus (Greene) Ottley | | a | i |
| Lotus oblongifolius (Benth.) Greene var. nevadensis (A. Gray) Munz | Lotus oblongifolius (Benth.) Greene var. oblongifolius | | i |
| Lotus oblongifolius (Benth.) Greene var. oblongifolius | | a | i |
| Lotus oblongifolius (Benth.) Greene var. torreyi (A. Gray) Ottley | Lotus oblongifolius (Benth.) Greene var. oblongifolius | | i |
| Lotus olgae Klokov | Lotus corniculatus L. | | |
| Lotus oliveirae A. Chev. | | a | |
| Lotus ononopsis Balf. f. | | a | i |
| Lotus ornithopodioides L. | | a | |
| Lotus ornithopoides | | a | |
| Lotus oroboides (Kunth) Ottley ex Kearney & Peebles | | a | |
| Lotus oroboides (Kunth) Ottley ex Kearney & Peebles var. nanus Isely | Lotus plebeius (Brandegee) Barneby | | i |
| Lotus oroboides (Kunth) Ottley ex Kearney & Peebles var. nummularius (M. E. Jones) Isely | Lotus plebeius (Brandegee) Barneby | | i |
| Lotus oxyphyllus Harms | | a | |
| Lotus palaestinus (Boiss. & Blanche) Blatt. | | a | |
| Lotus palustris Willd. | | a | |
| Lotus parviflorus Desf. | | a | i |
| Lotus peczoricus Miniaev & Ulle | Lotus corniculatus L. | | |
| Lotus pedunculatus auct. mult. | Lotus uliginosus Schkuhr | | |
| Lotus pedunculatus Cav. | | a | |
| Lotus pedunculatus Cav. var. villosus (Lamotte) O. Bolos & Vigo | Lotus uliginosus Schkuhr | | i |
| Lotus peliorhynchus Hook. f. | Lotus berthelotii Lowe ex Masf. | | i |
| Lotus pentaphyllus Link | Lotus sessilifolius DC. var. pentaphyllus (Link) D. H. Davis | | |
| Lotus peregrinus L. | | a | |
| Lotus peregrinus L. var. carmeli (Boiss.) Post | | a | i |
| Lotus peregrinus L. var. peregrinus | | a | i |
| Lotus pinnatus Hook. | | a | |
| Lotus platycarpos Viv. | Leobordea platycarpos (Viv.) B.-E. van Wyk & Boatwr. | | |
| Lotus plebeius (Brandegee) Barneby | | a | |
| Lotus polyphyllus E. D. Clarke | | a | |
| Lotus preslii Ten. | | a | |
| Lotus procumbens (Greene) Greene | | a | |
| Lotus procumbens (Greene) Greene var. jepsonii (Ottley) Ottley | | a | i |
| Lotus procumbens (Greene) Greene var. procumbens | | a | i |
| Lotus prostratus Desf. | Lotus cytisoides L. | | i |
| Lotus prostratus L. | Lotononis prostrata (L.) Benth. | | |
| Lotus purpureus Webb | | a | |
| Lotus purshianus Clem. & E. G. Clem. | Lotus unifoliolatus (Hook.) Benth. var. unifoliolatus | | |
| Lotus purshianus Clem. & E. G. Clem. var. glaber (Nutt.) Munz | Lotus unifoliolatus (Hook.) Benth. var. unifoliolatus | | i |
| Lotus purshianus Clem. & E. G. Clem. var. helleri (Britton) Isely | Lotus unifoliolatus (Hook.) Benth. var. helleri (Britton) Kartesz & Gandhi | | i |
| Lotus pusillus | | a | |
| Lotus pusillus Viv. | Lotus halophilus Boiss. & Spruner | | |
| Lotus quinatus (Forssk.) J. B. Gillett var. brachycarpus (Hochst. & Steud. ex A. Rich.) J. B. Gillett | | a | i |
| Lotus rectus L. | Dorycnium rectum (L.) Ser. | | |
| Lotus requienii Mauri ex Sanguin. | Lotus conjugatus L. subsp. requienii (Mauri ex Sanguin.) Greuter | | |
| Lotus rigidus (Benth.) Greene | | a | |
| Lotus roudairei Bonnet | Kebirita roudairei (Bonnet) Kramina & D. D. Sokoloff | | |
| Lotus rubellus (Nutt.) Greene | Lotus strigosus (Nutt.) Greene var. strigosus | | |
| Lotus rubriflorus Sharsm. | | a | |
| Lotus ruprechtii Miniaev | Lotus corniculatus L. | | |
| Lotus salsuginosus Greene | | a | |
| Lotus salsuginosus Greene var. brevivexillus Ottley | | a | i |
| Lotus salsuginosus Greene var. salsuginosus | | a | i |
| Lotus salvagensis R. P. Murray | Lotus glaucus Aiton | | |
| Lotus schoelleri Schweinf. | | a | i |
| Lotus scoparius (Nutt.) Ottley | | a | |
| Lotus scoparius (Nutt.) Ottley subsp. traskiae (Eastw. ex Abrams) P. H. Raven | Lotus dendroideus (Greene) Greene var. traskiae (Eastw. ex Abrams) Isely | | i |
| Lotus scoparius (Nutt.) Ottley var. brevialatus Ottley | | a | i |
| Lotus scoparius (Nutt.) Ottley var. dendroideus (Greene) Ottley | Lotus dendroideus (Greene) Greene var. dendroideus | | i |
| Lotus scoparius (Nutt.) Ottley var. veatchii (Greene) Ottley | Lotus dendroideus (Greene) Greene var. veatchii (Greene) Isely | | i |
| Lotus scoparius (Torr. & A. Gray) Ottley var. scoparius | | a | i |
| Lotus sericeus Pursh | Lotus unifoliolatus (Hook.) Benth. var. unifoliolatus | | |
| Lotus sessilifolius DC. | | a | |
| Lotus sessilifolius DC. var. pentaphyllus (Link) D. H. Davis | | a | i |
| Lotus sessilifolius DC. var. sessilifolius | | a | i |
| Lotus siliquosus L. | Lotus maritimus L. | | |
| Lotus sp | | a | |
| Lotus spartioides Webb & Berthel. | | a | |
| Lotus spectabilis Choisy ex Ser. | Dorycnium spectabile (Choisy ex Ser.) Webb & Berthel. | | |
| Lotus ssp | | a | |
| Lotus stenodon (Boiss. & Heldr.) Heldr. | | a | |
| Lotus stipularis (Benth.) Greene | | a | |
| Lotus stipularis (Benth.) Greene var. ottleyi Isely | | a | i |
| Lotus stipularis (Benth.) Greene var. stipularis | | a | i |
| Lotus stipularis (Benth.) Greene var. subglaber Ottley | Lotus aboriginus Jeps. | | i |
| Lotus stocksii Boiss. | Lotus garcinii DC. | | |
| Lotus strictus Fisch. & C. A. Mey. | | a | |
| Lotus strigosus (Nutt.) Greene | | a | |
| Lotus strigosus (Nutt.) Greene var. hirtellus (Greene) Ottley | | a | i |
| Lotus strigosus (Nutt.) Greene var. strigosus | | a | i |
| Lotus strigosus (Nutt.) Greene var. tomentellus (Greene) Isely | | a | i |
| Lotus suaveolens Pers. | Lotus subbiflorus Lag. | | |
| Lotus subbiflorus auct. nonn. | Lotus castellanus Boiss. & Reut. | | |
| Lotus subbiflorus Lag. | | a | |
| Lotus subbiflorus Lag. subsp. castellans (Boiss. & Reut.) P. W. Ball | | a | i |
| Lotus subpinnatus auct. N. Amer. | Lotus wrangelianus Fisch. & C. A. Mey. | | |
| Lotus subpinnatus Lag. | | a | |
| Lotus subsessilis Bornm. | Lotus gebelia Vent. var. anthylloides Boiss. | | |
| Lotus sulphureus Boiss. | Lotus aegaeus (Griseb.) Boiss. | | |
| Lotus superbus Bornm. | Lotus aegaeus (Griseb.) Boiss. | | |
| Lotus tauricus Juz. | Lotus corniculatus L. | | |
| Lotus tenuifolius (L.) C. Presl | Lotus tenuis Waldst. & Kit. ex Willd. | | |
| Lotus tenuis Waldst. & Kit. ex Willd. | | a | |
| Lotus tetragonolobus L. | | a | |
| Lotus tetraphyllus L. | | a | |
| Lotus tigrensis Baker | Lotus discolor E. Mey. | | |
| Lotus tingitanus Boiss. | Lotus conimbricensis Brot. | | |
| Lotus tomentellus Greene | Lotus strigosus (Nutt.) Greene var. tomentellus (Greene) Isely | | |
| Lotus torreyi (A. Gray) Greene | Lotus oblongifolius (Benth.) Greene var. oblongifolius | | |
| Lotus torulosus (Chiov.) Fiori | | a | |
| Lotus trigonelloides Webb & Berthel. | Lotus glinoides Delile | | |
| Lotus trispermis Greene | Lotus humistratus Greene | | |
| Lotus ucrainicus Klokov | Lotus corniculatus L. | | |
| Lotus uliginosus Schkuhr | | a | |
| Lotus uliginosus Schkuhr var. villosus Lamotte | Lotus uliginosus Schkuhr | | i |
| Lotus unifoliolatus (Hook.) Benth. | | a | |
| Lotus unifoliolatus (Hook.) Benth. var. helleri (Britton) Kartesz & Gandhi | | a | i |
| Lotus unifoliolatus (Hook.) Benth. var. unifoliolatus | | a | i |
| Lotus utahensis Ottley | | a | |
| Lotus varius Boiss. ex Brand | Lotus gebelia Vent. var. hirsutissimus (Ledeb.) Dinsm. | | |
| Lotus venustus (Eastw.) A. Heller | Lotus argophyllus (A. Gray) Greene var. argenteus Dunkle | | |
| Lotus villosus Forssk. | Lotus halophilus Boiss. & Spruner | | |
| Lotus weilleri Maire | | a | |
| Lotus wiedemannii (Boiss.) Nyman | Lotus aegaeus (Griseb.) Boiss. | | |
| Lotus wildii J. B. Gillett | | a | |
| Lotus wrangelianus Fisch. & C. A. Mey. | | a | |
| Lotus wrightii (A. Gray) Greene | | a | |
| Lotus wrightii (A. Gray) Greene var. multicaulis Ottley | Lotus argyraeus (Greene) Greene var. multicaulis (Ottley) Isely | | i |
| Lotus yollabolliensis Munz | | a | |
| Lotus zhegulensis Klokov | Lotus corniculatus L. | | |