| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| THDI4 | Thermopsis divaricarpa A. Nels. | spreadfruit goldenbanner | Fabaceae
|
| THFR3 | Thermopsis fraxinifolia Nutt. ex M.A. Curtis | ashleaf goldenbanner | Fabaceae
|
| THGRA | Thermopsis gracilis T.J. Howell var. argentata (Greene) Jepson | Thermopsis californica var. argentata | Fabaceae
|
| THGRG | Thermopsis gracilis T.J. Howell var. gracilis | slender goldenbanner | Fabaceae
|
| THGRO | Thermopsis gracilis T.J. Howell var. ovata (B.L. Robins. ex Piper) M. Mendenhall | slender goldenbanner | Fabaceae
|
| THGRV | Thermopsis gracilis T.J. Howell var. venosa (Eastw.) Jepson | Thermopsis gracilis var. gracilis | Fabaceae
|
| THGR6 | Thermopsis gracilis T.J. Howell | slender goldenbanner | Fabaceae
|
| THHU3 | Thermopsis hugeri (Small) Small | Thermopsis mollis | Fabaceae
|
| THMAS2 | Thermopsis macrophylla Hook. & Arn. ssp. semota (Jepson) Beauchamp | Thermopsis californica var. semota | Fabaceae
|
| THMAA | Thermopsis macrophylla Hook. & Arn. var. agnina J.T. Howell | Thermopsis macrophylla | Fabaceae
|
| THMAA2 | Thermopsis macrophylla Hook. & Arn. var. argentata (Greene) Jepson | Thermopsis californica var. argentata | Fabaceae
|
| THMAH | Thermopsis macrophylla Hook. & Arn. var. hitchcockii Isely | Thermopsis montana var. hitchcockii | Fabaceae
|
| THMAS | Thermopsis macrophylla Hook. & Arn. var. semota Jepson | Thermopsis californica var. semota | Fabaceae
|
| THMAV | Thermopsis macrophylla Hook. & Arn. var. velutina (Greene) Larisey | Thermopsis californica var. californica | Fabaceae
|
| THMAV2 | Thermopsis macrophylla Hook. & Arn. var. venosa (Eastw.) Isely | Thermopsis gracilis var. gracilis | Fabaceae
|
| THMA2 | Thermopsis macrophylla Hook. & Arn. | Santa Inez goldenbanner | Fabaceae
|
| THMOF2 | Thermopsis mollis (Michx.) M.A. Curtis ex Gray var. fraxinifolia (Nutt. ex M.A. Curtis) Isely | Thermopsis fraxinifolia | Fabaceae
|
| THMO2 | Thermopsis mollis (Michx.) M.A. Curtis ex Gray | Allegheny Mountain goldenbanner | Fabaceae
|
| THMOD | Thermopsis montana Nutt. var. divaricarpa (A. Nels.) Dorn | Thermopsis divaricarpa | Fabaceae
|
| THMOH | Thermopsis montana Nutt. var. hitchcockii (Isely) M. Mendenhall | mountain goldenbanner | Fabaceae
|
| THMOM3 | Thermopsis montana Nutt. var. montana | mountain goldenbanner | Fabaceae
|
| THMOO2 | Thermopsis montana Nutt. var. ovata (B.L. Robins. ex Piper) St. John | Thermopsis gracilis var. ovata | Fabaceae
|
| THMOV2 | Thermopsis montana Nutt. var. venosa (Eastw.) Jepson | Thermopsis gracilis var. gracilis | Fabaceae
|
| THMO6 | Thermopsis montana Nutt. | mountain goldenbanner | Fabaceae
|
| THOV2 | Thermopsis ovata B.L. Robins. ex Piper | Thermopsis gracilis var. ovata | Fabaceae
|
| THPI5 | Thermopsis pinetorum Greene | Thermopsis divaricarpa | Fabaceae
|
| THRHA | Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. var. annulocarpa (A. Nels.) L.O. Williams | Thermopsis rhombifolia | Fabaceae
|
| THRHA2 | Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. var. arenosa (A. Nels.) Larisey | Thermopsis rhombifolia | Fabaceae
|
| THRHD | Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. var. divaricarpa (A. Nels.) Isely | Thermopsis divaricarpa | Fabaceae
|
| THRHM | Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. var. montana (Nutt.) Isely | Thermopsis montana var. montana | Fabaceae
|
| THRHO | Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. var. ovata (B.L. Robins. ex Piper) Isely | Thermopsis gracilis var. ovata | Fabaceae
|
| THRH | Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richards. | prairie thermopsis | Fabaceae
|
| THRO4 | Thermopsis robusta T.J. Howell | showy goldenbanner | Fabaceae
|
| THSU3 | Thermopsis subglaber Henderson | Thermopsis gracilis var. gracilis | Fabaceae
|
| THVI | Thermopsis villosa (Walt.) Fern. & Schub. | Aaron's rod | Fabaceae
|
| THERM | Thermopsis R. Br. ex Ait. f. | goldenbanner | Fabaceae
|
| THVE7 | Thermutis velutina (Ach.) Flotow | | Lichinaceae
|
| THERM2 | Thermutis Fr. | thermutis | Lichinaceae
|
| THAC2 | Therofon aconitifolium (Nutt.) Millsp. | Boykinia aconitifolia | Saxifragaceae
|
| THRI2 | Therofon richardsonii (Hook.) Kuntze | Boykinia richardsonii | Saxifragaceae
|
| THTU2 | Therofon turbinatum Rydb. | Boykinia aconitifolia | Saxifragaceae
|
| THLI3 | Thesium linophyllon L. | flaxleaf | Santalaceae
|
| THESI | Thesium L. | thesium | Santalaceae
|
| THGR2 | Thespesia grandiflora DC. | maga | Malvaceae
|
| THPO3 | Thespesia populnea (L.) Soland. ex Correa | Portia tree | Malvaceae
|
| THESP | Thespesia Soland. ex Correa | thespesia | Malvaceae
|
| THNE3 | Thevetia neriifolia A. L. Juss. ex Steudel | Thevetia peruviana | Apocynaceae
|
| THPE3 | Thevetia peruviana (Pers.) K. Schum. | luckynut | Apocynaceae
|
| THTH3 | Thevetia thevetioides (Kunth) Schumann | thevetia | Apocynaceae
|
| THEVE | Thevetia Adans. | thevetia | Apocynaceae
|
| THKR | Thibaudia krugii Urban & Hoerold | Symphysia racemosa | Ericaceae
|
| THINB | Thinopyrum intermedium (Host) Barkworth & D.R. Dewey ssp. barbulatum (Schur) Barkworth & D.R. Dewey | Thinopyrum intermedium | Poaceae
|
| THIN6 | Thinopyrum intermedium (Host) Barkworth & D.R. Dewey | intermediate wheatgrass | Poaceae
|
| THJU3 | Thinopyrum junceiforme (A.& D. L�ve) A. L�ve | Russian wheatgrass | Poaceae
|
| THJU2 | Thinopyrum junceum (L.) A. L�ve p.p. | Thinopyrum junceiforme | Poaceae
|
| THPO7 | Thinopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang | tall wheatgrass | Poaceae
|
| THPY4 | Thinopyrum pycnanthum (Godr.) Barkworth, comb. nov. ined. | tick quackgrass | Poaceae
|
| THINO | Thinopyrum A. L�ve | wheatgrass | Poaceae
|
| THAM2 | Thismia americana N.E. Pfeiffer | banded Trinity | Burmanniaceae
|
| THISM | Thismia Griffith | thismia | Burmanniaceae
|
| THDU | Thladiantha dubia Bunge | Manchu tubergourd | Cucurbitaceae
|
| THLAD | Thladiantha Bunge | thladiantha | Cucurbitaceae
|
| THAI | Thlaspi aileeniae Rollins | Thlaspi idahoense var. aileeniae | Brassicaceae
|
| THAL2 | Thlaspi alliaceum L. | roadside pennycress | Brassicaceae
|
| THALG | Thlaspi alpestre L. var. glaucum A. Nels. | Thlaspi montanum var. montanum | Brassicaceae
|
| THAL5 | Thlaspi alpestre auct. non L. | Thlaspi montanum var. montanum | Brassicaceae
|
| THAR4 | Thlaspi arcticum Porsild | arctic pennycress | Brassicaceae
|
| THAR5 | Thlaspi arvense L. | field pennycress | Brassicaceae
|
| THAU7 | Thlaspi australe A. Nels. | Thlaspi montanum var. montanum | Brassicaceae
|
| THBU2 | Thlaspi bursa-pastoris L. | Capsella bursa-pastoris | Brassicaceae
|
| THCA3 | Thlaspi californicum S. Wats. | Kneeland Prairie pennycress | Brassicaceae
|
| THCA2 | Thlaspi campestre L. | Lepidium campestre | Brassicaceae
|
| THCO7 | Thlaspi cochleariforme DC. | Thlaspi montanum var. montanum | Brassicaceae
|
| THCO8 | Thlaspi coronopifolia Bergeret | Teesdalia coronopifolia | Brassicaceae
|
| THFEC | Thlaspi fendleri Gray var. coloradense (Rydb.) Maguire | Thlaspi montanum var. montanum | Brassicaceae
|
| THFEG | Thlaspi fendleri Gray var. glaucum (A. Nels.) C.L. Hitchc. | Thlaspi montanum var. montanum | Brassicaceae
|
| THFEH | Thlaspi fendleri Gray var. hesperium (Payson) C.L. Hitchc. | Thlaspi montanum var. montanum | Brassicaceae
|
| THFEI | Thlaspi fendleri Gray var. idahoense (Payson) C.L. Hitchc. | Thlaspi idahoense var. idahoense | Brassicaceae
|
| THFET | Thlaspi fendleri Gray var. tenuipes Maguire | Thlaspi montanum var. montanum | Brassicaceae
|
| THFE3 | Thlaspi fendleri Gray | Thlaspi montanum var. fendleri | Brassicaceae
|
| THGLH | Thlaspi glaucum (A. Nels.) A. Nels. var. hesperium Payson | Thlaspi montanum var. montanum | Brassicaceae
|
| THGLP | Thlaspi glaucum (A. Nels.) A. Nels. var. pedunculatum Payson | Thlaspi montanum var. montanum | Brassicaceae
|
| THGL2 | Thlaspi glaucum (A. Nels.) A. Nels. | Thlaspi montanum var. montanum | Brassicaceae
|
| THHE5 | Thlaspi hesperium (Payson) G.N. Jones | Thlaspi montanum var. montanum | Brassicaceae
|
| THIDA | Thlaspi idahoense Payson var. aileeniae (Rollins) Rollins | Idaho pennycress | Brassicaceae
|
| THIDI | Thlaspi idahoense Payson var. idahoense | Idaho pennycress | Brassicaceae
|
| THID | Thlaspi idahoense Payson | Idaho pennycress | Brassicaceae
|
| THMOC | Thlaspi montanum L. var. californicum (S. Wats.) P. Holmgren | Thlaspi californicum | Brassicaceae
|
| THMOF | Thlaspi montanum L. var. fendleri (Gray) P. Holmgren | Fendler's pennycress | Brassicaceae
|
| THMOI | Thlaspi montanum L. var. idahoense (Payson) P. Holmgren | Thlaspi idahoense var. idahoense | Brassicaceae
|
| THMOM | Thlaspi montanum L. var. montanum | alpine pennycress | Brassicaceae
|
| THMOS | Thlaspi montanum L. var. siskiyouense P. Holmgren | Siskiyou pennycress | Brassicaceae
|
| THMO5 | Thlaspi montanum L. | alpine pennycress | Brassicaceae
|
| THPA2 | Thlaspi parviflorum A. Nels. | meadow pennycress | Brassicaceae
|
| THPE | Thlaspi perfoliatum L. | Microthlaspi perfoliatum | Brassicaceae
|
| THPR3 | Thlaspi prolixum A. Nels. | Thlaspi montanum var. fendleri | Brassicaceae
|
| THST6 | Thlaspi stipitatum A. Nels. | Thlaspi montanum var. fendleri | Brassicaceae
|
| THLAS | Thlaspi L. | pennycress | Brassicaceae
|
| THDI5 | Tholurna dissimilis (Norman) Norman | urn lichen | Caliciaceae
|
| THOLU | Tholurna Norman | urn lichen | Caliciaceae
|
| THPO4 | Thouinia portoricensis Radlk. | Thouinia striata var. portoricensis | Sapindaceae
|