Uebelmannia pectinifera Uniola stricta Ursinia tenuiloba Uebelmannia pectinifera subsp. flavispina Urananthus russellianus Ursinia versicolor Ugena microphylla Ursulaea macvaughii Urginea altissima Uhdea bipinnatifida Urginea basutica Ursulaea tuitensis Ulmaria filipendula Urtica dioica Urginea capitata Umbellularia californica Urginea depressa Urtica incisa Umbilicus rupestris Urtica lucifuga Urginea filifolia Uncarina abbreviata Urginea hesperia Urtica serpyllacea Uncarina decaryi Urginea maritima Urtica urens Uncarina grandidieri Urginea multifolia Utahia peeblesiana Uncarina leptocarpa Utahia sileri Urginea noctiflora Uncarina peltata Urginea scilla Utricularia afromontana Uncarina perrieri Utricularia andicola Urginea undulata Uncarina platycarpa Urocarpidium mathewsii Utricularia denticulata Uncarina roeoesliana Utricularia dregei Urocarpidium peruvianum Uncarina sakalava Urospermum picroides Utricularia eburnea Uncarina stellulifera Utricularia elevata Ursinia anethoides Uncarina turicana Ursinia anthemoides Utricularia engleri Uncifera spp. Utricularia gentryi Ursinia anthemoides subsp. versicolor Uncinia rubra Ursinia cakilefolia Utricularia humbertiana Uncinia uncinata Utricularia humilis Ursinia calenduliflora Ungeria floribunda Ursinia chrysanthemoides Utricularia ibarensis Ungnadia speciosa Utricularia livida Ursinia nana Uniola palmeri Ursinia sericea Utricularia lobata Uniola spicata Utricularia longecalcarata Ursinia speciosa
Uebelmannia pectinifera Uebelmannia pectinifera subsp. flavispina Ugena microphylla Uhdea bipinnatifida Ulmaria filipendula Umbellularia californica Umbilicus rupestris Uncarina abbreviata Uncarina decaryi Uncarina grandidieri Uncarina leptocarpa Uncarina peltata Uncarina perrieri Uncarina platycarpa Uncarina roeoesliana Uncarina sakalava Uncarina stellulifera Uncarina turicana Uncifera spp. Uncinia rubra Uncinia uncinata Ungeria floribunda Ungnadia speciosa Uniola palmeri Uniola spicata Uniola stricta Urananthus russellianus Urginea altissima Urginea basutica Urginea capitata Urginea depressa Urginea filifolia Urginea hesperia Urginea maritima Urginea multifolia Urginea noctiflora Urginea scilla Urginea undulata Urocarpidium mathewsii Urocarpidium peruvianum Urospermum picroides Ursinia anethoides Ursinia anthemoides Ursinia anthemoides subsp. versicolor Ursinia cakilefolia Ursinia calenduliflora Ursinia chrysanthemoides Ursinia nana Ursinia sericea Ursinia speciosa Ursinia tenuiloba Ursinia versicolor Ursulaea macvaughii Ursulaea tuitensis Urtica dioica Urtica incisa Urtica lucifuga Urtica serpyllacea Urtica urens Utahia peeblesiana Utahia sileri Utricularia afromontana Utricularia andicola Utricularia denticulata Utricularia dregei Utricularia eburnea Utricularia elevata Utricularia engleri Utricularia gentryi Utricularia humbertiana Utricularia humilis Utricularia ibarensis Utricularia livida Utricularia lobata Utricularia longecalcarata