Trichomanes speciosum
Killarney Fern
Trifolium arvense
Hare's-foot Clover
Trifolium campestre
Hop Trefoil
Trifolium dubium
Lesser Trefoil
Trifolium medium
Zigzag Clover
Trifolium micranthum
Slender Trefoil
Trifolium ochroleucon
Sulphur Clover
Trifolium pratense
Red Clover
Trimezia martinicensis
Yellow Walking Iris
Trinia glauca
Honewort
Tripleurospermum inodorum
Scentless Mayweed
Tripleurospermum maritimum
Sea Mayweed
Trocdaris verticillata
Whorled Caraway
Trollius europaeus
Globeflower
Tuberaria guttata
Spotted Rock-rose
Tussilago farfara
Colt's-foot
Ulex europaeus
Gorse
Ulex gallii
Western Gorse
Ulmus glabra
Wych Elm
Ulmus minor agg
Small-leaved Elm
Ulmus procera
English Elm
Umbilicus rupestris
Navelwort
Urera caracasana
Flameberry
Urtica dioica
Common Nettle