| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| TRDAA | Trifolium dasyphyllum Torr. & Gray ssp. anemophilum (Greene) J. Gillett | alpine clover | Fabaceae
|
| TRDAD | Trifolium dasyphyllum Torr. & Gray ssp. dasyphyllum | alpine clover | Fabaceae
|
| TRDAU | Trifolium dasyphyllum Torr. & Gray ssp. uintense (Rydb.) J. Gillett | Uinta clover | Fabaceae
|
| TRDAA3 | Trifolium dasyphyllum Torr. & Gray var. anemophilum (Greene) J.S. Martin ex Isely | Trifolium dasyphyllum ssp. anemophilum | Fabaceae
|
| TRDAS | Trifolium dasyphyllum Torr. & Gray var. stenolobum (Rydb.) McDermott | Trifolium attenuatum | Fabaceae
|
| TRDAU3 | Trifolium dasyphyllum Torr. & Gray var. uintense (Rydb.) J.S. Martin ex Isely | Trifolium dasyphyllum ssp. uintense | Fabaceae
|
| TRDAU2 | Trifolium dasyphyllum Torr. & Gray var. uintense (Rydb.) Welsh | Trifolium dasyphyllum ssp. uintense | Fabaceae
|
| TRDA2 | Trifolium dasyphyllum Torr. & Gray | alpine clover | Fabaceae
|
| TRDE4 | Trifolium dedeckerae J. Gillett | Dedecker's clover | Fabaceae
|
| TRDEA | Trifolium depauperatum Desv. var. amplectens (Torr. & Gray) S. Wats. | balloon sack clover | Fabaceae
|
| TRDED | Trifolium depauperatum Desv. var. depauperatum | cowbag clover | Fabaceae
|
| TRDED2 | Trifolium depauperatum Desv. var. diversifolium (Nutt.) McDermott | balloon sack clover | Fabaceae
|
| TRDEH | Trifolium depauperatum Desv. var. hydrophilum (Greene) J.S. Martin ex Isely | Trifolium depauperatum var. diversifolium | Fabaceae
|
| TRDEL | Trifolium depauperatum Desv. var. laciniatum (Greene) Jepson | Trifolium depauperatum var. depauperatum | Fabaceae
|
| TRDES | Trifolium depauperatum Desv. var. stenophyllum (Nutt.) McDermott | balloon sack clover | Fabaceae
|
| TRDET | Trifolium depauperatum Desv. var. truncatum (Greene) McDermott ex Isely | Trifolium depauperatum var. stenophyllum | Fabaceae
|
| TRDE | Trifolium depauperatum Desv. | cowbag clover | Fabaceae
|
| TRDIT | Trifolium dichotomum Hook. & Arn. var. turbinatum Jepson | Trifolium dichotomum | Fabaceae
|
| TRDI6 | Trifolium dichotomum Hook. & Arn. | branched Indian clover | Fabaceae
|
| TRDO | Trifolium douglasii House | Douglas' clover | Fabaceae
|
| TRDU2 | Trifolium dubium Sibthorp | suckling clover | Fabaceae
|
| TREC2 | Trifolium echinatum Bieb. | prickly clover | Fabaceae
|
| TREL12 | Trifolium elegans Savi | Trifolium hybridum | Fabaceae
|
| TREL4 | Trifolium elmeri Greene | Trifolium longipes ssp. elmeri | Fabaceae
|
| TRERA2 | Trifolium eriocephalum Nutt. ssp. arcuatum (Piper) J. Gillett | woollyhead clover | Fabaceae
|
| TRERC2 | Trifolium eriocephalum Nutt. ssp. cascadense J. Gillett | Cascade clover | Fabaceae
|
| TRERC3 | Trifolium eriocephalum Nutt. ssp. cusickii (Piper) J. Gillett | Cusick's clover | Fabaceae
|
| TRERE | Trifolium eriocephalum Nutt. ssp. eriocephalum | woollyhead clover | Fabaceae
|
| TRERM | Trifolium eriocephalum Nutt. ssp. martinii J. Gillett | Martin's clover | Fabaceae
|
| TRERV2 | Trifolium eriocephalum Nutt. ssp. villiferum (House) J. Gillett | fuzzyleaf clover | Fabaceae
|
| TRERB | Trifolium eriocephalum Nutt. var. butleri Jepson | Trifolium eriocephalum ssp. eriocephalum | Fabaceae
|
| TRERC4 | Trifolium eriocephalum Nutt. var. cusickii (Piper) J.S. Martin | Trifolium eriocephalum ssp. cusickii | Fabaceae
|
| TRERH | Trifolium eriocephalum Nutt. var. harneyense (T.J. Howell) McDermott | Trifolium eriocephalum ssp. cusickii | Fabaceae
|
| TRERP2 | Trifolium eriocephalum Nutt. var. piperi J.S. Martin | Trifolium eriocephalum ssp. arcuatum | Fabaceae
|
| TRERV4 | Trifolium eriocephalum Nutt. var. villiferum (House) J.S. Martin | Trifolium eriocephalum ssp. villiferum | Fabaceae
|
| TRER2 | Trifolium eriocephalum Nutt. | woollyhead clover | Fabaceae
|
| TRFE2 | Trifolium fendleri Greene | Trifolium wormskioldii | Fabaceae
|
| TRFI2 | Trifolium fimbriatum Lindl. | Trifolium wormskioldii | Fabaceae
|
| TRFL8 | Trifolium flavulum Greene | Trifolium fucatum | Fabaceae
|
| TRFRB | Trifolium fragiferum L. ssp. bonannii (K. Presl) Soj�k | Trifolium fragiferum | Fabaceae
|
| TRFR2 | Trifolium fragiferum L. | strawberry clover | Fabaceae
|
| TRFR4 | Trifolium friscanum (Welsh) Welsh | Frisco clover | Fabaceae
|
| TRFUG | Trifolium fucatum Lindl. var. gambelii (Nutt.) Jepson | Trifolium fucatum | Fabaceae
|
| TRFUV | Trifolium fucatum Lindl. var. virescens (Greene) Jepson | Trifolium fucatum | Fabaceae
|
| TRFU | Trifolium fucatum Lindl. | bull clover | Fabaceae
|
| TRGA2 | Trifolium gambelii Nutt. | Trifolium fucatum | Fabaceae
|
| TRGE3 | Trifolium geminiflorum Greene | Trifolium variegatum | Fabaceae
|
| TRGL4 | Trifolium glomeratum L. | clustered clover | Fabaceae
|
| TRGRG | Trifolium gracilentum Torr. & Gray var. gracilentum | pinpoint clover | Fabaceae
|
| TRGRI | Trifolium gracilentum Torr. & Gray var. inconspicuum Fern. | Trifolium gracilentum var. gracilentum | Fabaceae
|
| TRGRP | Trifolium gracilentum Torr. & Gray var. palmeri (S. Wats.) McDermott | Palmer's clover | Fabaceae
|
| TRGR2 | Trifolium gracilentum Torr. & Gray | pinpoint clover | Fabaceae
|
| TRGR11 | Trifolium grayi Loja. | Trifolium barbigerum var. andrewsii | Fabaceae
|
| TRGYG | Trifolium gymnocarpon Nutt. ssp. gymnocarpon | hollyleaf clover | Fabaceae
|
| TRGYP2 | Trifolium gymnocarpon Nutt. ssp. plummerae (S. Wats.) J. Gillett | Plummer's clover | Fabaceae
|
| TRGYL | Trifolium gymnocarpon Nutt. var. lemmonii (S. Wats.) McDermott | Trifolium lemmonii | Fabaceae
|
| TRGYP3 | Trifolium gymnocarpon Nutt. var. plummerae (S. Wats.) J.S. Martin | Trifolium gymnocarpon ssp. plummerae | Fabaceae
|
| TRGYS2 | Trifolium gymnocarpon Nutt. var. subcaulescens (Gray) A. Nels. | Trifolium gymnocarpon ssp. gymnocarpon | Fabaceae
|
| TRGY | Trifolium gymnocarpon Nutt. | hollyleaf clover | Fabaceae
|
| TRHA2 | Trifolium hansenii Greene | Trifolium longipes ssp. hansenii | Fabaceae
|
| TRHAB | Trifolium haydenii Porter var. barnebyi Isely | Barneby's clover | Fabaceae
|
| TRHAH | Trifolium haydenii Porter var. haydenii | Hayden's clover | Fabaceae
|
| TRHA | Trifolium haydenii Porter | Hayden's clover | Fabaceae
|
| TRHE2 | Trifolium helleri Kennedy | Trifolium albopurpureum | Fabaceae
|
| TRHE3 | Trifolium heterodon Torr. & Gray | Trifolium wormskioldii | Fabaceae
|
| TRHI4 | Trifolium hirtum All. | rose clover | Fabaceae
|
| TRHOL | Trifolium howellii S. Wats. var. latifolium (Hook.) McDermott | Trifolium latifolium | Fabaceae
|
| TRHO | Trifolium howellii S. Wats. | canyon clover | Fabaceae
|
| TRHYE8 | Trifolium hybridum L. ssp. elegans (Savi) Aschers. & Graebn. | Trifolium hybridum | Fabaceae
|
| TRHYE | Trifolium hybridum L. var. elegans (Savi) Boiss. | Trifolium hybridum | Fabaceae
|
| TRHYP8 | Trifolium hybridum L. var. pratense Rabenh. | Trifolium hybridum | Fabaceae
|
| TRHY | Trifolium hybridum L. | alsike clover | Fabaceae
|
| TRIN9 | Trifolium inaequale Rydb. | Trifolium parryi ssp. montanense | Fabaceae
|
| TRINE | Trifolium incarnatum L. var. elatius Gibelli & Belli | Trifolium incarnatum | Fabaceae
|
| TRIN3 | Trifolium incarnatum L. | crimson clover | Fabaceae
|
| TRINA2 | Trifolium involucratum Ortega var. arizonicum (Greene) McDermott | Trifolium mucronatum ssp. lacerum | Fabaceae
|
| TRINF | Trifolium involucratum Ortega var. fendleri (Greene) McDermott | Trifolium wormskioldii | Fabaceae
|
| TRINF2 | Trifolium involucratum Ortega var. fimbriatum (Lindl.) McDermott | Trifolium wormskioldii | Fabaceae
|
| TRINH | Trifolium involucratum Ortega var. heterodon (Torr. & Gray) S. Wats. | Trifolium wormskioldii | Fabaceae
|
| TRINK | Trifolium involucratum Ortega var. kennedianum McDermott | Trifolium wormskioldii | Fabaceae
|
| TRJO | Trifolium jokerstii M. Vincent & R. Morgan | Jim's clover | Fabaceae
|
| TRKE | Trifolium kennedianum (McDermott) A. Nels. & J.F. Macbr. | Trifolium wormskioldii | Fabaceae
|
| TRKID | Trifolium kingii S. Wats. ssp. dedeckerae (J. Gillett) D. Heller | Trifolium dedeckerae | Fabaceae
|
| TRKIK | Trifolium kingii S. Wats. ssp. kingii | King's clover | Fabaceae
|
| TRKIM | Trifolium kingii S. Wats. ssp. macilentum (Greene) J. Gillett | King's clover | Fabaceae
|
| TRKIP | Trifolium kingii S. Wats. ssp. productum (Greene) D. Heller | Trifolium productum | Fabaceae
|
| TRKIR | Trifolium kingii S. Wats. ssp. rollinsii (J. Gillett) D. Heller | Trifolium rollinsii | Fabaceae
|
| TRKIB | Trifolium kingii S. Wats. var. brandegeei (S. Wats.) McDermott | Trifolium brandegeei | Fabaceae
|
| TRKIM2 | Trifolium kingii S. Wats. var. macilentum (Greene) Isely | Trifolium kingii ssp. macilentum | Fabaceae
|
| TRKIP2 | Trifolium kingii S. Wats. var. productum (Greene) Jepson | Trifolium productum | Fabaceae
|
| TRKI | Trifolium kingii S. Wats. | King's clover | Fabaceae
|
| TRLA20 | Trifolium lacerum Greene | Trifolium mucronatum ssp. lacerum | Fabaceae
|
| TRLA18 | Trifolium lappaceum L. | burdock clover | Fabaceae
|
| TRLA8 | Trifolium latifolium (Hook.) Greene | twin clover | Fabaceae
|
| TRLE | Trifolium leibergii A. Nels. & J.F. Macbr. | Leiberg's clover | Fabaceae
|
| TRLE2 | Trifolium lemmonii S. Wats. | Lemmon's clover | Fabaceae
|
| TRLI3 | Trifolium lilacinum Rydb., non Greene | Trifolium attenuatum | Fabaceae
|
| TRLI6 | Trifolium lividum Rydb. | Trifolium dasyphyllum ssp. dasyphyllum | Fabaceae
|
| TRLO6 | Trifolium longicaule Woot. & Standl. | Trifolium pinetorum | Fabaceae
|
| TRLOA | Trifolium longipes Nutt. ssp. atrorubens (Greene) J. Gillett | longstalk clover | Fabaceae
|
| TRLOC | Trifolium longipes Nutt. ssp. caurinum (Piper) J. Gillett | longstalk clover | Fabaceae
|