| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| TRPU8 | Trifolium pusillum Greene | Trifolium monanthum ssp. parvum | Fabaceae
|
| TRREG | Trifolium reflexum L. var. glabrum Loja. | Trifolium reflexum | Fabaceae
|
| TRREV | Trifolium reflexum L. var. virginicum (Small ex Small & Vail) McDermott | Trifolium virginicum | Fabaceae
|
| TRRE2 | Trifolium reflexum L. | buffalo clover | Fabaceae
|
| TRRE3 | Trifolium repens L. | white clover | Fabaceae
|
| TRRE4 | Trifolium resupinatum L. | reversed clover | Fabaceae
|
| TRRO5 | Trifolium rollinsii J. Gillett | Rollins' clover | Fabaceae
|
| TRRU7 | Trifolium rueppellianum Fresen. | Rueppell's clover | Fabaceae
|
| TRRUC | Trifolium rusbyi Greene ssp. caurinum (Piper) Heller & Zoh. | Trifolium longipes ssp. caurinum | Fabaceae
|
| TRRUM | Trifolium rusbyi Greene ssp. multipedunculatum (Kennedy) Heller & Zoh. | Trifolium longipes ssp. multipedunculatum | Fabaceae
|
| TRRUN | Trifolium rusbyi Greene ssp. neurophyllum (Greene) Heller & Zoh. | Trifolium neurophyllum | Fabaceae
|
| TRRUO | Trifolium rusbyi Greene ssp. oreganum (T.J. Howell) Heller & Zoh. | Trifolium longipes ssp. oreganum | Fabaceae
|
| TRRUR | Trifolium rusbyi Greene ssp. reflexum (A. Nels.) Heller & Zoh. | Trifolium longipes ssp. reflexum | Fabaceae
|
| TRRUS | Trifolium rusbyi Greene ssp. shastense (House) Heller & Zoh. | Trifolium longipes ssp. shastense | Fabaceae
|
| TRRUA | Trifolium rusbyi Greene var. atrorubens Greene | Trifolium longipes ssp. atrorubens | Fabaceae
|
| TRRU5 | Trifolium rusbyi Greene | Trifolium longipes ssp. pygmaeum | Fabaceae
|
| TRRY80 | Trifolium rydbergii Greene | Trifolium longipes ssp. reflexum | Fabaceae
|
| TRSA6 | Trifolium salictorum Greene ex Rydb. | Trifolium parryi ssp. salictorum | Fabaceae
|
| TRSA3 | Trifolium saxicola Small | Trifolium carolinianum | Fabaceae
|
| TRSC7 | Trifolium scabrum L. | rough clover | Fabaceae
|
| TRSC5 | Trifolium scariosum A. Nels. | Trifolium dasyphyllum ssp. anemophilum | Fabaceae
|
| TRSE7 | Trifolium semipilosum Fresen. | Kenya clover | Fabaceae
|
| TRSH | Trifolium shastense House | Trifolium longipes ssp. shastense | Fabaceae
|
| TRSI6 | Trifolium simulans House | Trifolium monanthum ssp. grantianum | Fabaceae
|
| TRSI4 | Trifolium siskiyouense J. Gillett | Siskiyou clover | Fabaceae
|
| TRSP6 | Trifolium spinulosum Dougl. ex Hook. | Trifolium wormskioldii | Fabaceae
|
| TRSP82 | Trifolium spumosum L. | Mediterranean clover | Fabaceae
|
| TRSQ | Trifolium squamosum L. | sea clover | Fabaceae
|
| TRST8 | Trifolium stenolobum Rydb. | Trifolium attenuatum | Fabaceae
|
| TRST9 | Trifolium stenophyllum Nutt. | Trifolium depauperatum var. stenophyllum | Fabaceae
|
| TRST4 | Trifolium stoloniferum Muhl. ex Eat. | running buffalo clover | Fabaceae
|
| TRST5 | Trifolium striatum L. | knotted clover | Fabaceae
|
| TRSU8 | Trifolium subcaulescens Gray | Trifolium gymnocarpon ssp. gymnocarpon | Fabaceae
|
| TRSU3 | Trifolium subterraneum L. | subterranean clover | Fabaceae
|
| TRTE8 | Trifolium tenerum Eastw. | Trifolium monanthum ssp. tenerum | Fabaceae
|
| TRTH2 | Trifolium thompsonii Morton | Thompson's clover | Fabaceae
|
| TRTO4 | Trifolium tomentosum L. | woolly clover | Fabaceae
|
| TRTR11 | Trifolium traskiae Kennedy | Trifolium macraei | Fabaceae
|
| TRTR | Trifolium trichocalyx Heller | Monterey clover | Fabaceae
|
| TRTRA | Trifolium tridentatum Lindl. var. aciculare (Nutt.) McDermott | Trifolium willdenowii | Fabaceae
|
| TRTRO | Trifolium tridentatum Lindl. var. obtusiflorum (Hook. f.) S. Wats. | Trifolium obtusiflorum | Fabaceae
|
| TRTR2 | Trifolium tridentatum Lindl. | Trifolium willdenowii | Fabaceae
|
| TRTR14 | Trifolium trilobatum Jepson | Trifolium variegatum | Fabaceae
|
| TRTR6 | Trifolium truncatum (Greene) Greene | Trifolium depauperatum var. stenophyllum | Fabaceae
|
| TRUI | Trifolium uintense Rydb. | Trifolium dasyphyllum ssp. uintense | Fabaceae
|
| TRUN5 | Trifolium uniflorum L. | oneflower clover | Fabaceae
|
| TRVAM | Trifolium variegatum Nutt. var. major Loja. | Trifolium variegatum | Fabaceae
|
| TRVAM2 | Trifolium variegatum Nutt. var. melananthum (Hook. & Arn.) Greene | Trifolium variegatum | Fabaceae
|
| TRVAP | Trifolium variegatum Nutt. var. pauciflorum (Nutt.) McDermott | Trifolium oliganthum | Fabaceae
|
| TRVAR | Trifolium variegatum Nutt. var. rostratum (Greene) C.L. Hitchc. | Trifolium variegatum | Fabaceae
|
| TRVAT | Trifolium variegatum Nutt. var. trilobatum (Jepson) McDermott | Trifolium variegatum | Fabaceae
|
| TRVA | Trifolium variegatum Nutt. | whitetip clover | Fabaceae
|
| TRVE | Trifolium vesiculosum Savi | arrowleaf clover | Fabaceae
|
| TRVI6 | Trifolium villiferum House | Trifolium eriocephalum ssp. villiferum | Fabaceae
|
| TRVI3 | Trifolium virginicum Small ex Small & Vail | Kates Mountain clover | Fabaceae
|
| TRWI3 | Trifolium willdenovii Sprengel | Trifolium wormskioldii | Fabaceae
|
| TRWIF | Trifolium willdenowii Spreng. var. fimbriatum (Lindl.) Ewan | Trifolium wormskioldii | Fabaceae
|
| TRWIK | Trifolium willdenowii Spreng. var. kennedianum (McDermott) Ewan | Trifolium wormskioldii | Fabaceae
|
| TRWIL | Trifolium willdenowii Spreng. var. longicaule (Woot. & Standl.) L. Benson | Trifolium pinetorum | Fabaceae
|
| TRWI | Trifolium willdenowii Spreng. | tomcat clover | Fabaceae
|
| TRWOA | Trifolium wormskioldii Lehm. var. arizonicum (Greene) Barneby | Trifolium mucronatum ssp. lacerum | Fabaceae
|
| TRWOF | Trifolium wormskioldii Lehm. var. fimbriatum (Lindl.) Jepson | Trifolium wormskioldii | Fabaceae
|
| TRWOK | Trifolium wormskioldii Lehm. var. kennedianum (McDermott) Jepson | Trifolium wormskioldii | Fabaceae
|
| TRWOL | Trifolium wormskioldii Lehm. var. longicaule (Woot. & Standl.) L. Benson | Trifolium pinetorum | Fabaceae
|
| TRWO | Trifolium wormskioldii Lehm. | cows clover | Fabaceae
|
| TRIFO | Trifolium L. | clover | Fabaceae
|
| TRCA20 | Trifurcia caerulea Herbert | Herbertia lahue ssp. caerulea | Iridaceae
|
| TRLAC | Trifurcia lahue (Molina) Goldblatt ssp. caerulea (Herbert) Goldblatt | Herbertia lahue ssp. caerulea | Iridaceae
|
| TRCOD | Triglochin concinnum Burtt-Davy var. debile (M.E. Jones) J.T. Howell | Triglochin maritimum | Juncaginaceae
|
| TRCO4 | Triglochin concinnum Burtt-Davy | Utah arrowgrass | Juncaginaceae
|
| TRDE5 | Triglochin debile (M.E. Jones) A.& D. L�ve | Triglochin maritimum | Juncaginaceae
|
| TREL8 | Triglochin elatum Nutt. | Triglochin maritimum | Juncaginaceae
|
| TRGA3 | Triglochin gaspense Lieth & D. L�ve | Gaspe Peninsula arrowgrass | Juncaginaceae
|
| TRMAE | Triglochin maritimum L. var. elatum (Nutt.) Gray | Triglochin maritimum | Juncaginaceae
|
| TRMA4 | Triglochin maritimum L. | seaside arrowgrass | Juncaginaceae
|
| TRPA6 | Triglochin palustre L. | marsh arrowgrass | Juncaginaceae
|
| TRST6 | Triglochin striatum Ruiz & Pav�n | threerib arrowgrass | Juncaginaceae
|
| TRIGL | Triglochin L. | arrowgrass | Juncaginaceae
|
| TRCA14 | Trigonella caerulea (L.) Ser. | blue fenugreek | Fabaceae
|
| TRCO7 | Trigonella corniculata (L.) L. | cultivated fenugreek | Fabaceae
|
| TRFO80 | Trigonella foenum-graecum L. | sicklefruit fenugreek | Fabaceae
|
| TRLA26 | Trigonella laciniata L. | cutleaf fenugreek | Fabaceae
|
| TRMO7 | Trigonella monspeliaca L. | Medicago monspeliaca | Fabaceae
|
| TRNE8 | Trigonella neoana Boiss. | Medicago monantha | Fabaceae
|
| TRPO8 | Trigonella polycarpa Boiss. & Heldr. | Medicago heldreichii | Fabaceae
|
| TRPR8 | Trigonella procumbens (Bess.) Reichenb. | trailing fenugreek | Fabaceae
|
| TRRA8 | Trigonella ramosa L. | | Fabaceae
|
| TRRU10 | Trigonella ruthenica L. | Medicago ruthenica | Fabaceae
|
| TRIGO | Trigonella L. | fenugreek | Fabaceae
|
| TROD | Trilisa odoratissima (J.F. Gmel.) Cass. | Carphephorus odoratissimus | Asteraceae
|
| TRPA7 | Trilisa paniculata (J.F. Gmel.) Cass. | Carphephorus paniculatus | Asteraceae
|
| TRAL4 | Trillium albidum J.D. Freeman | giant white wakerobin | Liliaceae
|
| TRAN5 | Trillium angustipetalum (Torr.) J.D. Freeman | narrowpetal wakerobin | Liliaceae
|
| TRCA11 | Trillium catesbaei Ell. | bashful wakerobin | Liliaceae
|
| TRCEM | Trillium cernuum L. var. macranthum Eames & Wieg. | Trillium cernuum | Liliaceae
|
| TRCE | Trillium cernuum L. | whip-poor-will flower | Liliaceae
|
| TRCHA | Trillium chloropetalum (Torr.) T.J. Howell var. angustipetalum (Torr.) Munz | Trillium angustipetalum | Liliaceae
|
| TRCHC | Trillium chloropetalum (Torr.) T.J. Howell var. chloropetalum | giant wakerobin | Liliaceae
|
| TRCHG | Trillium chloropetalum (Torr.) T.J. Howell var. giganteum (Hook. & Arn.) Munz | giant wakerobin | Liliaceae
|
| TRCH2 | Trillium chloropetalum (Torr.) T.J. Howell | giant wakerobin | Liliaceae
|
| TRCUL | Trillium cuneatum Raf. var. luteum (Muhl.) Ahles | Trillium luteum | Liliaceae
|