Seeds Prohibited Entry into the U.S. - T
| Botanical Name | Authority |
|---|---|
| Tabernaemontana rotensis | ESA-T |
| Tapinanthus spp. | Parasitic |
| Taraxacum californicum | ESA-E |
| Taraxacum officinale | FSA-V |
| Tarchonanthus camphoratus | NAPPRA |
| Taxillus spp. | Parasitic |
| Teclea spp. | Treatment |
| Tectaria estremerana | ESA-E |
| Teinostachyum spp. | NAPPRA |
| Temburongia spp. | NAPPRA |
| Temochloa spp. | NAPPRA |
| Terminthodia spp. (see: Tetractomia) | Treatment |
| Ternstroemia luquillensis | ESA-E |
| Ternstroemia subsessilis | ESA-E |
| Tetractomia spp. | Treatment |
| Tetradium (= Evodium) spp. | Treatment |
| Tetradyas spp. | NW |
| Tetragonia tetragonioides | FSA-V |
| Tetragonocalamus (= Chimonobambusa) spp. | NAPPRA |
| Tetramolopium arenarium | ESA-E |
| Tetramolopium capillare | ESA-E |
| Tetramolopium filiforme | ESA-E |
| Tetramolopium lepidotum ssp. lepidotum | ESA-E |
| Tetramolopium remyi | ESA-E |
| Tetramolopium rockii | ESA-T |
| Tetraneuris herbacea | ESA-T |
| Tetraplasandra (Polyscias) gymnocarpa | ESA-E |
| Tetraspidium spp. | Parastitic |
| Tetrastylidium spp. | Parasitic |
| Thalictrum cooleyi | ESA-E |
| Thamnocalamus spp. | NAPPRA |
| Thamnosma spp. | Treatment |
| Thaumasianthes spp. | Parasitic |
| Thelocactus (= Turbinocarpus) spp. | CITES |
| Thelypodium howellii ssp. spectabilis | ESA-T |
| Thelypodium stenopetalum | ESA-E |
| Thelypteris inabonensis | ESA-E |
| Thelypteris (Leptogramma) pilosa v. alabamensis | ESA-T |
| Thelypteris verecunda | ESA-E |
| Thelypteris yaucoensis | ESA-E |
| Thesidium spp. | Parasitic |
| Thesium spp. | Parasitic |
| Thinopyrm intermedium ssp. intermedium | FSA-A |
| Thlaspi californicum | ESA-E |
| Thonningia spp. | Parasitic |
| Thunbergianthus spp. | Parasitic |
| Thyrsostachys spp. | NAPPRA |
| Thymophylla tephroleuca | ESA-E |
| Thyrsostachys spp. | NAPPRA |
| Thysanocarpus conchuliferus | ESA-E |
| Ticorea spp. | Treatment |
| Tiedemannia (Oxypolis) canbyi | ESA-E |
| Tinospora homosepala | ESA-E |
| Toddalia spp. | Treatment |
| Toddaliopsis spp. | Treatment |
| Tolypanthes spp. | Parasitic |
| Torreya taxifolia | ESA-E |
| Toumeya (= Pediocactus) bradyi | CITES |
| Toumeya (= Pediocactus) peeblesiana | CITES |
| Toumeya (= Sclerocactus) papyracanthus | CITES |
| Toumeya (= Turbinocarpus) spp. | CITES |
| Townsendia aprica | ESA-E |
| Toxicodendron succedaneum | NAPPRA |
| Toxicosiphon spp. | Treatment |
| Tozzia spp. | Parasitic |
| Tractocopevodia spp. | Treatment |
| Tragopogon porrifolius | FSA-V |
| Trematolobelia singularis | ESA-E |
| Trichilia triacantha | ESA-E |
|
Trichomanes punctatum ssp. floridanum Trichosanthes cucumerina |
ESA-E FSA-V |
| Trichostemma austromontanum ssp. compactum | ESA-T |
| Tridax procumbens | NW |
| Trifolium alexandrinum | FSA-A |
| Trifolium amoenum | ESA-E |
| Trifolium campestre | FSA-A |
| Trifolium dubium | FSA-A |
| Trifolium fragiferum | FSA-A |
| Trifolium glomeratum | FSA-A |
| Trifolium hirtum | FSA-A |
| Trifolium hybridum | FSA-A |
| Trifolium incarnatum | FSA-A |
| Trifolium lappaceum | FSA-A |
| Trifolium pratense | FSA-A |
| Trifolium repens | FSA-A |
| Trifolium resupinatum | FSA-A |
| Trifolium semipilosum | FSA-A |
| Trifolium stoloniferum | ESA-E |
| Trifolium subterraneaneum | FSA-A |
| Trifolium trichocalyx | ESA-E |
| Trifolium vesiculosum | FSA-A |
| Trigastrotheca pentaphylla | NAPPRA |
| Trilepidea spp. | Parasitic |
| Trillium persistans | ESA-E |
| Trillium reliquum | ESA-E |
| Trilobachne spp. | NAPPRA |
| Triphasia spp. | Treatment |
| Triphysaria spp. | Parasitic |
| Tripodanthus spp. | Parasitic |
| Tripsacum spp. | NAPPRA |
| Tristerix spp. | Parasitic |
| Trithecanthera spp. | Parasitic |
| Triticosecale spp. (Secale x Triticum) | NAPPRA |
| Triticum spp. | NAPPRA |
| Triticum x Agrotriticum | FSA-A |
| Triticum aestivum spp. | FSA-A |
| Triticum compactum spp. | FSA-A |
| Triticum dicoccon spp. | FSA-A |
| Triticum polonicum spp. | FSA-A |
| Triticum spelta spp. | FSA-A |
| Triticum spp. | NAPPRA |
| xTriordeum | NAPPRA |
| Triticum turgidum | FSA-A |
| Triticum x Agrotriticum | FSA-A |
| Tritordium spp. (Hordium x Triticum) | NAPPRA |
| Triphysaria spp. | NW |
| Tripodanthus spp. | NW |
| Tristerix spp. | NW |
| Trithecanthera spp. | Parasitic |
| Tuberolabium guamense | ESA-T |
| Tuctoria greenei | ESA-E |
| Tuctoria mucronata | ESA-E |
| Tupeia spp. | Parasitic |
| Turbinocarpus spp. | CITES |
| Tylecodon bodleyae (S. Africa) | CITES III |
| Tylecodon nolteei (S. Africa) | CITES III |
| Tylecodon reticulatus (S. Africa) | CITES III |