| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| TRLOH | Trifolium longipes Nutt. ssp. hansenii (Greene) J. Gillett | Hansen's clover | Fabaceae
|
| TRLOL3 | Trifolium longipes Nutt. ssp. longipes | longstalk clover | Fabaceae
|
| TRLOM | Trifolium longipes Nutt. ssp. multipedunculatum (Kennedy) J. Gillett | longstalk clover | Fabaceae
|
| TRLOO | Trifolium longipes Nutt. ssp. oreganum (T.J. Howell) J. Gillett | Oregon clover | Fabaceae
|
| TRLOP | Trifolium longipes Nutt. ssp. pedunculatum (Rydb.) J. Gillett | longstalk clover | Fabaceae
|
| TRLOP2 | Trifolium longipes Nutt. ssp. pygmaeum (Gray) J. Gillett | pygmy clover | Fabaceae
|
| TRLOR3 | Trifolium longipes Nutt. ssp. reflexum (A. Nels.) J. Gillett | droopflower clover | Fabaceae
|
| TRLOS2 | Trifolium longipes Nutt. ssp. shastense (House) J. Gillett | longstalk clover | Fabaceae
|
| TRLOA2 | Trifolium longipes Nutt. var. atrorubens (Greene) Jepson | Trifolium longipes ssp. atrorubens | Fabaceae
|
| TRLOB | Trifolium longipes Nutt. var. brachypus S. Wats. | Trifolium longipes ssp. pygmaeum | Fabaceae
|
| TRLOE2 | Trifolium longipes Nutt. var. elmeri (Greene) McDermott | Trifolium longipes ssp. elmeri | Fabaceae
|
| TRLOH2 | Trifolium longipes Nutt. var. hansenii (Greene) Jepson | Trifolium longipes ssp. hansenii | Fabaceae
|
| TRLOL4 | Trifolium longipes Nutt. var. latifolium Hook. | Trifolium latifolium | Fabaceae
|
| TRLOM2 | Trifolium longipes Nutt. var. multiovulatum (Henderson) C.L. Hitchc. | Trifolium longipes ssp. caurinum | Fabaceae
|
| TRLOM3 | Trifolium longipes Nutt. var. multipedunculatum (Kennedy) J.S. Martin ex Isely | Trifolium longipes ssp. multipedunculatum | Fabaceae
|
| TRLON | Trifolium longipes Nutt. var. neurophyllum (Greene) J.S. Martin ex Isely | Trifolium neurophyllum | Fabaceae
|
| TRLON2 | Trifolium longipes Nutt. var. nevadense Jepson | Trifolium longipes ssp. hansenii | Fabaceae
|
| TRLOO2 | Trifolium longipes Nutt. var. oreganum (T.J. Howell) Isely | Trifolium longipes ssp. oreganum | Fabaceae
|
| TRLOP3 | Trifolium longipes Nutt. var. pedunculatum (Rydb.) C.L. Hitchc. | Trifolium longipes ssp. pedunculatum | Fabaceae
|
| TRLOP5 | Trifolium longipes Nutt. var. pedunculatum (Rydb.) Isely | Trifolium longipes ssp. pedunculatum | Fabaceae
|
| TRLOP4 | Trifolium longipes Nutt. var. pygmaeum Gray | Trifolium longipes ssp. pygmaeum | Fabaceae
|
| TRLOR | Trifolium longipes Nutt. var. reflexum A. Nels. | Trifolium longipes ssp. reflexum | Fabaceae
|
| TRLOR4 | Trifolium longipes Nutt. var. rusbyi (Greene) Harrington | Trifolium longipes ssp. pygmaeum | Fabaceae
|
| TRLOS | Trifolium longipes Nutt. var. shastense (House) Jepson | Trifolium longipes ssp. shastense | Fabaceae
|
| TRLO | Trifolium longipes Nutt. | longstalk clover | Fabaceae
|
| TRLU | Trifolium lupinaster L. | lupine clover | Fabaceae
|
| TRMAD3 | Trifolium macilentum Greene var. dedeckerae (J. Gillett) Barneby | Trifolium dedeckerae | Fabaceae
|
| TRMAR | Trifolium macilentum Greene var. rollinsii (J. Gillett) Barneby | Trifolium rollinsii | Fabaceae
|
| TRMA | Trifolium macilentum Greene | Trifolium kingii ssp. macilentum | Fabaceae
|
| TRMAA2 | Trifolium macraei Hook. & Arn. var. albopurpureum (Torr. & Gray) Greene | Trifolium albopurpureum | Fabaceae
|
| TRMAD2 | Trifolium macraei Hook. & Arn. var. dichotomum (Hook. & Arn.) Brewer ex S. Wats. | Trifolium dichotomum | Fabaceae
|
| TRMA2 | Trifolium macraei Hook. & Arn. | Chilean clover | Fabaceae
|
| TRMAC | Trifolium macrocephalum (Pursh) Poir. var. caeruleomontanum St. John | Trifolium macrocephalum | Fabaceae
|
| TRMA3 | Trifolium macrocephalum (Pursh) Poir. | largehead clover | Fabaceae
|
| TRMA14 | Trifolium maritinum Huds. | Trifolium squamosum | Fabaceae
|
| TRME | Trifolium medium L. | zigzag clover | Fabaceae
|
| TRME6 | Trifolium melananthum Hook. & Arn. | Trifolium variegatum | Fabaceae
|
| TRME7 | Trifolium mercedense Kennedy | Trifolium macraei | Fabaceae
|
| TRMI14 | Trifolium michelianum Savi | bigflower clover | Fabaceae
|
| TRMI4 | Trifolium microcephalum Pursh | smallhead clover | Fabaceae
|
| TRMIP | Trifolium microdon Hook. & Arn. var. pilosum Eastw. | Trifolium microdon | Fabaceae
|
| TRMI5 | Trifolium microdon Hook. & Arn. | thimble clover | Fabaceae
|
| TRMOG | Trifolium monanthum Gray ssp. grantianum (Heller) J. Gillett | mountain carpet clover | Fabaceae
|
| TRMOM | Trifolium monanthum Gray ssp. monanthum | mountain carpet clover | Fabaceae
|
| TRMOP | Trifolium monanthum Gray ssp. parvum (Kellogg) J. Gillett | mountain carpet clover | Fabaceae
|
| TRMOT | Trifolium monanthum Gray ssp. tenerum (Eastw.) J. Gillett | mountain carpet clover | Fabaceae
|
| TRMOC | Trifolium monanthum Gray var. caulescens Loja. | Trifolium monanthum ssp. parvum | Fabaceae
|
| TRMOE | Trifolium monanthum Gray var. eastwoodianum J.S. Martin | Trifolium monanthum ssp. tenerum | Fabaceae
|
| TRMOG2 | Trifolium monanthum Gray var. grantianum (Heller) Parish | Trifolium monanthum ssp. grantianum | Fabaceae
|
| TRMOP2 | Trifolium monanthum Gray var. parvum (Kellogg) McDermott | Trifolium monanthum ssp. parvum | Fabaceae
|
| TRMOP3 | Trifolium monanthum Gray var. pusillum (Greene) Jepson | Trifolium monanthum ssp. parvum | Fabaceae
|
| TRMOT2 | Trifolium monanthum Gray var. tenerum (Eastw.) Parish | Trifolium monanthum ssp. tenerum | Fabaceae
|
| TRMO2 | Trifolium monanthum Gray | mountain carpet clover | Fabaceae
|
| TRMO9 | Trifolium monoense Greene | Trifolium andersonii ssp. monoense | Fabaceae
|
| TRMO12 | Trifolium montanense Rydb. | Trifolium parryi ssp. montanense | Fabaceae
|
| TRMUL | Trifolium mucronatum Willd. ex Spreng. ssp. lacerum (Greene) J. Gillett | spinytooth clover | Fabaceae
|
| TRMUA | Trifolium mucronatum Willd. ex Spreng. var. arizonicum (Greene) Isely | Trifolium mucronatum ssp. lacerum | Fabaceae
|
| TRMU3 | Trifolium mucronatum Willd. ex Spreng. | cusp clover | Fabaceae
|
| TRMU4 | Trifolium multicaule M.E. Jones | Trifolium monanthum ssp. parvum | Fabaceae
|
| TRMU6 | Trifolium multipedunculatum Kennedy | Trifolium longipes ssp. multipedunculatum | Fabaceae
|
| TRNA2 | Trifolium nanum Torr. | dwarf clover | Fabaceae
|
| TRNE6 | Trifolium nemorale Greene | Trifolium gymnocarpon ssp. gymnocarpon | Fabaceae
|
| TRNE4 | Trifolium neolagopus Loja. | Trifolium albopurpureum | Fabaceae
|
| TRNE3 | Trifolium neurophyllum Greene | White Mountain clover | Fabaceae
|
| TRNI3 | Trifolium nigrescens Viviani | small white clover | Fabaceae
|
| TROB2 | Trifolium obtusiflorum Hook. f. | clammy clover | Fabaceae
|
| TROL | Trifolium oliganthum Steud. | fewflower clover | Fabaceae
|
| TROLC | Trifolium olivaceum Greene var. columbianum (Greene) Jepson | Trifolium albopurpureum | Fabaceae
|
| TROLG | Trifolium olivaceum Greene var. griseum Jepson | Trifolium albopurpureum | Fabaceae
|
| TROL2 | Trifolium olivaceum Greene | olive clover | Fabaceae
|
| TROR6 | Trifolium orbiculatum Kennedy & McDermott | Trifolium latifolium | Fabaceae
|
| TRORM | Trifolium oreganum T.J. Howell var. multiovulatum Henderson | Trifolium longipes ssp. caurinum | Fabaceae
|
| TRORR | Trifolium oreganum T.J. Howell var. rydbergii (Greene) McDermott | Trifolium longipes ssp. reflexum | Fabaceae
|
| TROR7 | Trifolium oreganum T.J. Howell | Trifolium longipes ssp. oreganum | Fabaceae
|
| TROW | Trifolium owyheense Gilkey | Owyhee clover | Fabaceae
|
| TROX | Trifolium oxydon Greene ex Rydb. | Trifolium mucronatum ssp. lacerum | Fabaceae
|
| TRPA4 | Trifolium palmeri S. Wats. | Trifolium gracilentum var. palmeri | Fabaceae
|
| TRPAM | Trifolium parryi Gray ssp. montanense (Rydb.) J. Gillett | Parry's clover | Fabaceae
|
| TRPAP | Trifolium parryi Gray ssp. parryi | Parry's clover | Fabaceae
|
| TRPAS | Trifolium parryi Gray ssp. salictorum (Greene ex Rydb.) J. Gillett | Parry's clover | Fabaceae
|
| TRPAM2 | Trifolium parryi Gray var. montanense (Rydb.) Isely | Trifolium parryi ssp. montanense | Fabaceae
|
| TRPAM3 | Trifolium parryi Gray var. montanense (Rydb.) Welsh | Trifolium parryi ssp. montanense | Fabaceae
|
| TRPA5 | Trifolium parryi Gray | Parry's clover | Fabaceae
|
| TRPAP2 | Trifolium pauciflorum Nutt. var. parvum Kellogg | Trifolium monanthum ssp. parvum | Fabaceae
|
| TRPA15 | Trifolium pauciflorum Nutt. | Trifolium oliganthum | Fabaceae
|
| TRPE15 | Trifolium pedunculatum Rydb. | Trifolium longipes ssp. pedunculatum | Fabaceae
|
| TRPE13 | Trifolium petraeum Greene | Trifolium attenuatum | Fabaceae
|
| TRPE14 | Trifolium petrophilum Greene ex Heller | Trifolium albopurpureum | Fabaceae
|
| TRPI3 | Trifolium pinetorum Greene | woods clover | Fabaceae
|
| TRPL4 | Trifolium plummerae S. Wats. | Trifolium gymnocarpon ssp. plummerae | Fabaceae
|
| TRPLA | Trifolium plumosum Dougl. ex Hook. ssp. amplifolium (J.S. Martin) J. Gillett | bigleaf clover | Fabaceae
|
| TRPLP | Trifolium plumosum Dougl. ex Hook. ssp. plumosum | plumed clover | Fabaceae
|
| TRPLA2 | Trifolium plumosum Dougl. ex Hook. var. amplifolium J.S. Martin | Trifolium plumosum ssp. amplifolium | Fabaceae
|
| TRPL2 | Trifolium plumosum Dougl. ex Hook. | plumed clover | Fabaceae
|
| TRPO6 | Trifolium polymorphum Poir. | peanut clover | Fabaceae
|
| TRPO3 | Trifolium polyodon Greene | Trifolium variegatum | Fabaceae
|
| TRPRF | Trifolium pratense L. var. frigidum auct. non Gaudin | Trifolium pratense | Fabaceae
|
| TRPRS | Trifolium pratense L. var. sativum (P. Mill.) Schreb. | Trifolium pratense | Fabaceae
|
| TRPR2 | Trifolium pratense L. | red clover | Fabaceae
|
| TRPR7 | Trifolium procumbens L. 1755, non 1753 | Trifolium campestre | Fabaceae
|
| TRPR4 | Trifolium productum Greene | Shasta clover | Fabaceae
|