| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| TRDE2 | Trillium decipiens J.D. Freeman | Chattahoochee River wakerobin | Liliaceae
|
| TRDE6 | Trillium declinatum auct. non (Gray) Gleason | Trillium flexipes | Liliaceae
|
| TRDE3 | Trillium decumbens Harbison | trailing wakerobin | Liliaceae
|
| TRDI5 | Trillium discolor Wray ex Hook. | mottled wakerobin | Liliaceae
|
| TRERA | Trillium erectum L. var. album Pursh | Trillium erectum | Liliaceae
|
| TRERB2 | Trillium erectum L. var. blandum Jennison | Trillium flexipes | Liliaceae
|
| TRERD | Trillium erectum L. var. declinatum auct. non Gray | Trillium flexipes | Liliaceae
|
| TRERF | Trillium erectum L. var. flavum Torr. | Trillium erectum | Liliaceae
|
| TRERS | Trillium erectum L. var. sulcatum Barksdale | Trillium sulcatum | Liliaceae
|
| TRERV3 | Trillium erectum L. var. vaseyi (Harbison) Ahles | Trillium vaseyi | Liliaceae
|
| TRER3 | Trillium erectum L. | red trillium | Liliaceae
|
| TRFL6 | Trillium flexipes Raf. | nodding wakerobin | Liliaceae
|
| TRFO | Trillium foetidissimum J.D. Freeman | Mississippi River wakerobin | Liliaceae
|
| TRGI2 | Trillium giganteum (Hook. & Arn.) Heller | Trillium chloropetalum var. giganteum | Liliaceae
|
| TRGL6 | Trillium gleasonii auct. non Fern. | Trillium flexipes | Liliaceae
|
| TRGR6 | Trillium gracile J.D. Freeman | Sabine River wakerobin | Liliaceae
|
| TRGR4 | Trillium grandiflorum (Michx.) Salisb. | snow trillium | Liliaceae
|
| TRHU2 | Trillium hugeri Small | Trillium cuneatum | Liliaceae
|
| TRKU | Trillium kurabayashii J.D. Freeman | giant purple wakerobin | Liliaceae
|
| TRLA21 | Trillium lanceolatum (S. Wats.) Boykin ex Small | Trillium lancifolium | Liliaceae
|
| TRLA15 | Trillium lancifolium Raf. | lanceleaf wakerobin | Liliaceae
|
| TRLU2 | Trillium ludovicianum Harbison | Louisiana wakerobin | Liliaceae
|
| TRLU3 | Trillium luteum (Muhl.) Harbison | yellow wakerobin | Liliaceae
|
| TRMA5 | Trillium maculatum Raf. | spotted wakerobin | Liliaceae
|
| TRNI2 | Trillium nivale Riddell | dwarf white wakerobin | Liliaceae
|
| TROVO | Trillium ovatum Pursh ssp. oettingeri Munz & Thorne | Oettinger's trillium | Liliaceae
|
| TROVO2 | Trillium ovatum Pursh ssp. ovatum | Pacific trillium | Liliaceae
|
| TROV2 | Trillium ovatum Pursh | Pacific trillium | Liliaceae
|
| TROZ2 | Trillium ozarkanum Palmer & Steyermark | Trillium pusillum var. ozarkanum | Liliaceae
|
| TRPA11 | Trillium parviflorum Soukup | smallflower wakerobin | Liliaceae
|
| TRPE7 | Trillium persistens Duncan | persistent wakerobin | Liliaceae
|
| TRPE3 | Trillium petiolatum Pursh | Idaho trillium | Liliaceae
|
| TRPUM | Trillium pusillum Michx. var. monticulum Bodkin & Reveal | Trillium pusillum var. virginianum | Liliaceae
|
| TRPUO | Trillium pusillum Michx. var. ozarkanum (Palmer & Steyermark) Steyermark | Ozark wakerobin | Liliaceae
|
| TRPUP2 | Trillium pusillum Michx. var. pusillum | dwarf wakerobin | Liliaceae
|
| TRPUT | Trillium pusillum Michx. var. texanum (Buckl.) C.F. Reed | Trillium texanum | Liliaceae
|
| TRPUT2 | Trillium pusillum Michx. var. texanum (Buckl.) Reveal & Broome | Trillium texanum | Liliaceae
|
| TRPUV | Trillium pusillum Michx. var. virginianum Fern. | Virginia wakerobin | Liliaceae
|
| TRPU3 | Trillium pusillum Michx. | dwarf wakerobin | Liliaceae
|
| TRREL | Trillium recurvatum Beck ssp. lanceolatum (S. Wats.) E. Murr. | Trillium lancifolium | Liliaceae
|
| TRRE5 | Trillium recurvatum Beck | bloody butcher | Liliaceae
|
| TRRE6 | Trillium reliquum J.D. Freeman | Confederate wakerobin | Liliaceae
|
| TRRI2 | Trillium rivale S. Wats. | brook wakerobin | Liliaceae
|
| TRRU2 | Trillium rugelii Rendle | illscented wakerobin | Liliaceae
|
| TRSEG | Trillium sessile L. ssp. giganteum (Hook. & Arn.) E. Murr. | Trillium chloropetalum var. giganteum | Liliaceae
|
| TRSEA | Trillium sessile L. var. angustipetalum Torr. | Trillium angustipetalum | Liliaceae
|
| TRSEC | Trillium sessile L. var. chloropetalum Torr. | Trillium chloropetalum var. chloropetalum | Liliaceae
|
| TRSEG2 | Trillium sessile L. var. giganteum Hook. & Arn. | Trillium chloropetalum var. giganteum | Liliaceae
|
| TRSE2 | Trillium sessile L. | toadshade | Liliaceae
|
| TRSI3 | Trillium simile Gleason | jeweled wakerobin | Liliaceae
|
| TRST7 | Trillium stamineum Harbison | Blue Ridge wakerobin | Liliaceae
|
| TRSU7 | Trillium sulcatum Patrick | furrowed wakerobin | Liliaceae
|
| TRTE3 | Trillium texanum Buckl. | Texas wakerobin | Liliaceae
|
| TRUN2 | Trillium underwoodii Small | longbract wakerobin | Liliaceae
|
| TRUN | Trillium undulatum Willd. | painted trillium | Liliaceae
|
| TRVA2 | Trillium vaseyi Harbison | sweet wakerobin | Liliaceae
|
| TRVI7 | Trillium virginianum (Fern.) C.F. Reed | Trillium pusillum var. virginianum | Liliaceae
|
| TRVIL | Trillium viride Beck var. luteum (Muhl.) Gleason | Trillium luteum | Liliaceae
|
| TRVI4 | Trillium viride Beck | wood wakerobin | Liliaceae
|
| TRVI5 | Trillium viridescens Nutt. | tapertip wakerobin | Liliaceae
|
| TRILL | Trillium L. | trillium | Liliaceae
|
| TRMA6 | Trimezia martinicensis (Jacq.) Herbert | Martinique trimezia | Iridaceae
|
| TRIME | Trimezia Salisb. ex Herbert | trimezia | Iridaceae
|
| TRUM | Trimmatothele umbellulariae Herre | | Verrucariaceae
|
| TRIMM | Trimmatothele Norman ex Zahlbr. | trimmatothele | Verrucariaceae
|
| TRACA | Trimorpha acris (L.) S.F. Gray var. asteroides (Andrz. ex Bess.) Nesom | Erigeron acris ssp. politus | Asteraceae
|
| TRACD | Trimorpha acris (L.) S.F. Gray var. debilis (Gray) Nesom | Erigeron acris ssp. debilis | Asteraceae
|
| TRACK | Trimorpha acris (L.) S.F. Gray var. kamtschatica (DC.) Nesom | Erigeron acris ssp. kamtschaticus | Asteraceae
|
| TRAC3 | Trimorpha acris auct. non (L.) S.F. Gray p.p. | Erigeron acris ssp. debilis | Asteraceae
|
| TRAC3 | Trimorpha acris auct. non (L.) S.F. Gray p.p. | Erigeron acris ssp. politus | Asteraceae
|
| TREL10 | Trimorpha elata (Hook.) Nesom | Erigeron elatus | Asteraceae
|
| TRLO3 | Trimorpha lonchophylla (Hook.) Nesom | Erigeron lonchophyllus | Asteraceae
|
| TRBI2 | Triodanis biflora (Ruiz & Pav�n) Greene | Triodanis perfoliata var. biflora | Campanulaceae
|
| TRCO5 | Triodanis coloradoensis (Buckl.) McVaugh | Colorado Venus' looking-glass | Campanulaceae
|
| TRHO2 | Triodanis holzingeri McVaugh | Holzinger's Venus' looking-glass | Campanulaceae
|
| TRLA10 | Triodanis lamprosperma McVaugh | prairie Venus' looking-glass | Campanulaceae
|
| TRLE3 | Triodanis leptocarpa (Nutt.) Nieuwl. | slimpod Venus' looking-glass | Campanulaceae
|
| TRPEB | Triodanis perfoliata (L.) Nieuwl. var. biflora (Ruiz & Pav�n) Bradley | clasping Venus' looking-glass | Campanulaceae
|
| TRPEP | Triodanis perfoliata (L.) Nieuwl. var. perfoliata | clasping Venus' looking-glass | Campanulaceae
|
| TRPE4 | Triodanis perfoliata (L.) Nieuwl. | clasping Venus' looking-glass | Campanulaceae
|
| TRTE4 | Triodanis texana McVaugh | Texas Venus' looking-glass | Campanulaceae
|
| TRIOD | Triodanis Raf. ex Greene | Venus' looking-glass | Campanulaceae
|
| TRCH3 | Triodia chapmanii (Small) Bush | Tridens flavus var. chapmanii | Poaceae
|
| TRDR2 | Triodia drummondii Scribn. & Kearney | Tridens carolinianus | Poaceae
|
| TREL7 | Triodia elliottii Bush | Tridens ambiguus | Poaceae
|
| TREL5 | Triodia elongata (Buckl.) Scribn. | Tridens muticus var. elongatus | Poaceae
|
| TRER5 | Triodia eragrostoides Vasey & Scribn. | Tridens eragrostoides | Poaceae
|
| TRFL7 | Triodia flava (L.) Smyth | Tridens flavus var. flavus | Poaceae
|
| TRMU5 | Triodia mutica (Torr.) Scribn. | Tridens muticus var. muticus | Poaceae
|
| TRPU9 | Triodia pulchella Kunth | Dasyochloa pulchella | Poaceae
|
| TRST11 | Triodia stricta (Nutt.) Benth. ex Vasey | Tridens strictus | Poaceae
|
| TRTR13 | Trionum trionum (L.) Woot. & Standl. | Hibiscus trionum | Malvaceae
|
| TREC | Triorchos ecristata (Fern.) Small | Pteroglossaspis ecristata | Orchidaceae
|
| TRANE | Triosteum angustifolium L. var. eamesii Wieg. | Triosteum angustifolium | Caprifoliaceae
|
| TRAN3 | Triosteum angustifolium L. | yellowfruit horse-gentian | Caprifoliaceae
|
| TRAUA | Triosteum aurantiacum Bickn. var. aurantiacum | orangefruit horse-gentian | Caprifoliaceae
|
| TRAUG | Triosteum aurantiacum Bickn. var. glaucescens Wieg. | orangefruit horse-gentian | Caprifoliaceae
|
| TRAUI | Triosteum aurantiacum Bickn. var. illinoense (Wieg.) Palmer & Steyermark | Illinois horse-gentian | Caprifoliaceae
|
| TRAU4 | Triosteum aurantiacum Bickn. | orangefruit horse-gentian | Caprifoliaceae
|
| TRIL | Triosteum illinoense (Wieg.) Rydb. | Triosteum aurantiacum var. illinoense | Caprifoliaceae
|
| TRPEA | Triosteum perfoliatum L. var. aurantiacum (Bickn.) Wieg. | Triosteum aurantiacum var. aurantiacum | Caprifoliaceae
|