| jump to: a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z |
| uebelinia also called campions, silene, cucubalus, heliosperma, lychnis, steris, viscaria |
| ulex |
| ulex europaeus also called furze, gorse, ulex europeus |
| ulex europeus also called furze, gorse, ulex europaeus |
| ulmus |
| ulmus americana |
| ulva |
| umbellularia californica also called california bay, california bay tree |
| umbilicus |
| uncaria |
| upland cotton also called american cotton, cotton, gossypium hirsutum |
| urochloa platyphylla also called broadleaf signalgrass, brachiaria platyphylla |
| urtica |
| urtica dioica also called great nettle, stinging nettle |
| urticales also called rosales, rhamnales, rosanae |
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