tropical Asiatic annual cultivated for its small tassel-shaped heads of scarlet flowers
thorny amaranth
Noun
erect annual of tropical central Asia and Africa having a pair of divergent spines at most leaf nodes
trailing four o'clock
Noun
trailing plant having crowded clusters of 3 brilliant deep pink flowers resembling a single flower blooming near the ground
trailing windmills
Noun
trailing plant having crowded clusters of 3 brilliant deep pink flowers resembling a single flower blooming near the ground
turnip plant
Noun
any of several widely cultivated plants having edible roots
tansy mustard
Noun
North American herb with bitter-tasting pinnate leaves resembling those of tansy
tendergreen
Noun
Asiatic plant cultivated for its swollen root crown and edible foliage
tower cress
Noun
European cress having stiff erect stems
tower cress
Noun
or genus Arabis: erect cress widely distributed throughout Europe
tower mustard
Noun
European cress having stiff erect stems
tower mustard
Noun
or genus Arabis: erect cress widely distributed throughout Europe
toothwort
Noun
North American herb with pungent scaly or toothed roots
tetterwort
Noun
perennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic properties
tree celandine
Noun
small Central American tree having loose racemes of purple-tinted green flowers
tansy-leaved rocket
Noun
perennial stellate and hairy herb with small yellow flowers of mountains of southern Europe
tree poppy
Noun
evergreen shrub of southwestern United States and Mexico often cultivated for its fragrant golden yellow flowers
tickseed sunflower
Noun
North American bur marigold with large flowers
trifid beggar-ticks
Noun
bur marigold of temperate Eurasia
trifid bur marigold
Noun
bur marigold of temperate Eurasia
tradescant's aster
Noun
a variety of aster
tickseed
Noun
any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods
tickweed
Noun
any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods
tick-weed
Noun
any of numerous plants of the genus Coreopsis having a profusion of showy usually yellow daisylike flowers over long periods
tong ho
Noun
grown for its succulent edible leaves used in Asian cooking
thoroughwort
Noun
perennial herb of southeastern United States having white-rayed flower heads
trumpet weed
Noun
North American herb having whorled leaves and terminal clusters of flowers spotted with purple
thistle
Noun
any of numerous plants of the family Compositae and especially of the genera Carduus and Cirsium and Onopordum having prickly-edged leaves
treasure flower
Noun
decumbent South African perennial with short densely leafy stems and orange flower rays with black eyespots at base
turpentine weed
Noun
low-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower heads
tahoka daisy
Noun
wild aster with fernlike leaves and flower heads with very narrow bright purple rays
tansy leaf aster
Noun
wild aster with fernlike leaves and flower heads with very narrow bright purple rays
tall sunflower
Noun
very tall American perennial of central and the eastern United States to Canada having edible tuberous roots
tidytips
Noun
California annual having flower heads with yellow rays tipped with white
tidy tips
Noun
California annual having flower heads with yellow rays tipped with white
tarweed
Noun
any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally
tarweed
Noun
any of various resinous glandular plants of the genus Madia
tansy
Noun
common perennial aromatic herb native to Eurasia having buttonlike yellow flower heads and bitter-tasting pinnate leaves sometimes used medicinally
tithonia
Noun
any plant of the genus Tithonia
tall goldenrod
Noun
a variety of goldenrod
threadleaf groundsel
Noun
bluish-green bushy leafy plant covered with close white wool and bearing branched clusters of yellow flower heads
tansy ragwort
Noun
widespread European weed having yellow daisylike flowers
throatwort
Noun
European bellflower with blue-purple to lilac flowers formerly used to treat sore throat
tussock bellflower
Noun
European perennial bellflower that grows in clumps with spreading stems and blue or white flowers
tulip orchid
Noun
Mexican epiphytic orchid with glaucous grey-green leaves and lemon- to golden-yellow flowers appearing only partially opened
tongueflower
Noun
orchid having blue to purple flowers with tongue-shaped or strap-shaped protuberances (calli) at the lip base
tongue-flower
Noun
orchid having blue to purple flowers with tongue-shaped or strap-shaped protuberances (calli) at the lip base
tortoise plant
Noun
South African vine having a massive rootstock covered with deeply fissured bark
tangle orchid
Noun
an orchid of the genus Plectorrhiza having tangled roots and long wiry stems bearing lax racemes of small fragrant green flowers
twayblade
Noun
an orchid of the genus Liparis having a pair of leaves
twayblade
Noun
orchid having a pair of ovate leaves and a long slender raceme of green flowers sometimes tinged red-brown