| T |
| Taboo rose, Rosa 'TANelorak' |
| Tailed bracken fern, Pteridium aquilinum var. psedocaudocanudatrum |
| Taiwanese miscanthus, Miscanthus transmorrisonensis |
| Tall Poppy rose, Rosa 'Tall Poppy' |
| Tall purple moor grass, Molina caerulea subsp. arundinacea |
| Tall switch grass, Panicum virgatum 'Cloud Nine' |
| Tamarisk, Tamarix ramosissima |
| Tamarix, Tamarix ramosissima |
| Tamora rose, Rosa 'AUStamora' |
| Tangerine Dream rose, Rosa 'Tangerine Dream' |
| Tango rose, Rosa 'MACfinwal' |
| Tansy, Tanacetum vulgare |
| Tapering fern; New York fern, Thelpteris novaboracensis |
| Tara wingceltis, Pteroceltis tartarinowii |
| Taro, Colocasia |
| Tarragon, Artemisia dracunculus |
| Tassel fern; Japanese tassel fern; Bristle fern, Polystichum polylepharum |
| Tazettas, Narcissus (Paperwhites) - Tender III |
| Tea of Heaven, Hydrangea serrata |
| Tea olive, Fragrant, Osmanthus fragrans |
| Tea olive, Holly, Osmanthus heterophyllus |
| Tea, New Jersey, Ceanothus americanus |
| Teaberry; Spreading wintergreen; Common wintergreen, Gaultheria procumbens |
| Teaolive, Delavay, Osmanthus delavayi |
| Tenjiku suge, Carex phyllocephala |
| Ternstroemia, Japanese (Cleyera), Ternstroemia gymnanthera |
| Texas Dawn water lily, Nymphaea 'Texas Dawn' |
| Thalia, Powdery, Thalia dealbata |
| The Countryman rose, Rosa 'AUSman' |
| The Dark Lady rose, Rosa 'AUSbloom' |
| The Fairy rose, Rosa 'The Fairy' |
| The Garland rose, Rosa 'The Garland' |
| The Pilgrim rose, Rosa 'AUSwalker' |
| Thelma rose, Rosa 'Thelma' |
| Therese Bugnet rose, Rosa 'Therese Bugnet' |
| Thermopsis; Bush pea; False lupine, Thermopsis villosa |
| Thimbleweed; Large white-flowered anemone, Anemone riparia |
| Thimbleweed; Tall anemone, Anemone virginiana |
| Thistle, Bull; Common thistle, Cirsium vulgare |
| Thistle, Pasture; Fragrant thistle, Cirsium pumilum |
| Thistle, Plume, Cirsium |
| Thistle, Swamp, Cirsium muticum |
| Thistle, Yellow, Cirsium horridulum |
| Thistle; Swamp thistle, Carduus muticus |
| Thoroughwort, Hyssop-leaved; Hyssop-leaved bonset, Eupatorium hyssopifolium |
| Thrift, Common; Sea pink; Maritime thrift, Armeria martima |
| Thrift; Moss pink, Phlox subulata |
| Thyme, Caraway, Thymus herba-barona |
| Thyme, Common, Thymus vulgaris |
| Thyme, Creeping, Thymus serpyllum |
| Thyme, Creeping; Mother of thyme, Thymus praecox |
| Thyme, Creeping; Mother of thyme, Thymus serpyllum |
| Thyme, Garden; Common thyme, Thymus vulgaris |
| Thyme, Juniper, Thymus leucotrichus |
| Tickseed, Wood; Greater tickseed, Coreopsis major |
| Tickseed, Bidens aristosa |
| Tickseed; Bur marigold, Bidens aristosa |
| Tiffany rose, Rosa 'Tiffany' |
| Timeless rose, Rosa 'JACecond' |
| Tina water lily, Nymphaea 'Tina' |
| Tipo Ideale rose, Rosa chinensis mutabilis |
| Titi, Cliftonia monophylla |
| Titi, Cyrilla racemiflora |
| Titi, Leatherwood, Cyrilla racemiflora |
| Toadflax, Linaria canadensis |
| Toadflax, Yellow; Butter and eggs, Linaria vulgaris |
| Tobacco, Rabbit; Cudweed, Gnaphalium obtusifolium var. praecox |
| Tobone rose, Rosa 'Tobone' |
| Tongue fern; Felt fern, Pyrrosia lingua |
| Toothed wood fern; Spinulose wood fern; Shield fern, Dryopteris carthusiana |
| Toothwort, Cut-leafed, Dentaria laciniata |
| Topaz Jewel rose, Rosa 'MORyerug' |
| Toro rose, Rosa 'Toro' |
| Touch of Class rose, Rosa 'Touch of Class' |
| Touch-me-not, Impatiens spp. |
| Touch-me-not; Jewel weed, Impatiens capensis |
| Tournament of Roses, Rosa 'JACient' |
| Trailing arbutus, Epigaea repens |
| Travemunde rose, Rosa 'KORrantu' |
| Treasure flower, Gazania rigens |
| Tree mallow, Lavatera arborea; Lavatera trimestris |
| Tree of heaven, Ailanthus altissima |
| Trefoil, Naked-flowered tick, Desmodium nudiflorum |
| Trillium, Catesby's, Trillium catesbaei |
| Trillium, Colorless, Trillium discolor |
| Trillium, Dwarf white flowering; Dwarf wakerobin, Trillium pusillum |
| Trillium, Hugher's; Little sweet Betsy, Trillium cuneatum |
| Trillium, Large flowered, Trillium grandiflorum |
| Trillium, Nodding, Trillium cernuum |
| Trillium, Painted, Trillum undulatum |
| Trillium, Propellor; Blue Ridge wakerobin, Trillium stamineum |
| Trillium, Red; Toadshade trillium; Sessile trillium, Trillium sessile |
| Trillium, Trillium spp. |
| Trillium, White erect; White wakerobin, Trillium erectum forma albiflorum |
| Trillium, Yellow, Trillium luyeum |
| Trillium; Wakerobin; Red trillium, Trillium erectum |
| Trillum, Painted, Trillum undulatum |
| Trillum; Wake Robin, Trillium erectum |
| Triteleia, Long rayed , Brodiaea laxa (Triteleia) |
| Tropicana rose, Rosa 'TANorstar' |
| Trout lily, Fawn lily, Dog-tooth violet, Erythronium americanum |
| True daisy, Bellis perennis |
| Trumpet creeper 'Madame Galen', Campsis x tagliabuana |
| Trumpet creeper, Campsis radicans |
| Trumpet creeper, Campsis radicans |
| Trumpet creeper, Campsis x tagliabuana |
| Trumpet creeper, Chinese, Campsis grandiflora |
| Trumpet flower, Bignonia capreolata, Doxantha capreolata |
| Trumpet honeysuckle, Lonicera sempervirens |
| Trumpet vine, Campsis grandiflora |
| Trumpet vine, Campsis radicans |
| Tsu-sima holly fern; Korean rock fern, Polystichum tsus-simense |
| Tuber oat grass; Bulbous oat grass, Arrhenatherum elatius subsp. bulbosum |
| Tuberose, Polianthes |
| Tufted grass; Tufted sedge, Carex elata (Carex stricta) |
| Tufted hair grass; Tussock grass, Deschampsia cespitosa (Aira cespitosa) |
| Tulip tree, Chinese, Liriodendron chinense |
| Tulip tree, Liriodendron tulipifer |
| Tulips, Tulipa hybrids |
| Tupelo, Black, Nyssa sylvatica |
| Tupelo, Chinese, Nyssa sinensis |
| Tupelo, Ogeechee, Nyssa ogeche |
| Tupelo, Swamp, Nyssa biflora |
| Tupelo, Water, Nyssa aquatica |
| Turk's cap lily, Lilium superbum |
| Turk's turban, Malvaviscus arboreus |
| Turmeric, Curcuma |
| Turtlehead, Chelone lyonii |
| Turtlehead, White; Chelone, Chelone glabra |
| Turtlehead; Lyon's turtlehead, Chelone lyonii |
| Twayblade, Lily-leaved; Large twayblade, Liparis lilifolia |
| Tweedia, Oxypetalum caeruleum = Tweedia caerulea |
| Twinberry; Partridge berry, Mitchella repens |
| Twinleaf, Jeffersonia diphylla |
| Twinspur, Diascia barberae |
| Twinspur, Diascia intergerrima |
| Twisted stalk; White mandarin, Streptopus amplexifolius |
| Two-flowered pea Lathyrus grandiflours |