All (in this database) Plants list (Scientific names): Part U
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- uber (Ashe) (Betula)
- uber Ashe (Crataegus), see Crataegus roanensis
- uber Bailey (Rubus), see Rubus allegheniensis var. gravesii
- ucrainicum Kaschm., 1905 (Hedysarum)
- ucranica (Bess.) ( Campanularapunculoides)
- udum (I. Hag.) ( Brachytheciummildeanum)
- udus Bailey (Rubus), see Rubus setosus
- uintahensis (Nels.) ( Arenariakingii)
- uintense (Trifolium), see Trifolium dasyphyllum
- Ulex L. (Fabaceae)
- uliginosa Hedw. (Meesia)
- uliginosa (Lindenb.) (Scapania)
- uliginosa Nutt. (Solidago)
- uliginosa Rydb. (Campanula)
- uliginosa (Willd.) (Gentianella)
- uliginosa (T. & G.) (Valeriana)
- uliginosa Besser (Viola)
- × uliginosa A. Braun ex Döll (Dryopteris), see Dryopteris carthusiana × cristata
- × uliginosa Braun, see Dryopteris cristata × spinulosa
- uliginosa (Gentiana amarella ssp. ), see Gentianella uliginosa
- uliginosa L. (Filaginella), see Gnaphalium uliginosum
- uliginosa Murray (Stellaria), see Stellaria alsine
- uliginosa Opiz (Sesleria caerulea ssp. ), see Sesleria caerulea
- uliginosa Willd. (Gentiana), see Gentianella uliginosa
- uliginosum (Brid.) (Bryum)
- uliginosum L. (Gnaphalium)
- uliginosum L. (Vaccinium)
- uliginosum L. (Galium)
- uliginosum Braun, 1843 (Aspidium spinulosum v. ), see Dryopteris cristata × spinulosa
- uliginosum Wallr. (commune var. ), see Polytrichum commune
- uliginosus Fern. (Rubus), see Rubus pascuus
- uliginosus Schkuhr (Lotus), see Lotus pedunculatus
- Ullucus (Basellaceae)
- Ulmaceae Mirb. (Magnoliopsida)
- ulmaria (L.) (Filipendula)
- Ulmaria Hill, 1786 (Rosaceae), see Filipendula
- ulmaria L. (Spiraea), see Filipendula ulmaria
- ulmifolia Muhl. (Solidago)
- ulmifolia Scop. (Spiraea), see Spiraea chamaedryfolia
- ulmifolius Schott (Rubus)
- ulmoides Oliv. (Eucommia)
- Ulmus L. (Ulmaceae)
- ulophylla Broth. (Ulota), see Ulota crispa
- Ulota Mohr (Orthotrichaceae)
- ulterior Bailey (Rubus), see Rubus kennedyanus
- ultramontana (Wats.) ( Rosawoodsii)
- ultramontanus Greene ( Ranunculusoccidentalis)
- umbellana Lam. (Abronia)
- umbellata Schkuhr (Carex)
- umbellata L. (Hydrocotyle)
- umbellata L. (Iberis)
- umbellata Bertol. (Tolpis)
- umbellata (Muhl.) (Strophostyles)
- umbellata L. (Marcgravia)
- umbellata (Torr.) (Cistanthe)
- umbellata (L.) (Chimaphila)
- umbellata Ell. (Prunus)
- umbellata (Chimophila), see Chimaphila umbellata
- umbellata (Pirola), see Chimaphila umbellata
- umbellata (Spraguea umbellata var. ), see Cistanthe umbellata var. umbellata
- umbellata Torr. (Spraguea), see Cistanthe umbellata
- umbellatum L. (Ornithogalum)
- umbellatum L. (Hieracium)
- umbellatum Torr. (Eriogonum)
- umbellatum (Centaurium), see Centaurium erythraea
- umbellatum (Ornithogalum), see Ornithogalum angustifolium
- umbellatum Gilib. (Centaurium), see Centaurium erythraea
- umbellatum Pursh (Lilium), see Lilium philadelphicum var. andinum
- umbellatum auct. (Ornithogalum), see Ornithogalum angustifolium
- umbellatus L. (Butomus)
- umbellatus Mill (Aster)
- umbellatus Bunge (Astragalus)
- umbellatus Mill. (Diplopappus), see Aster umbellatus
- umbellatus Mill. (Doellingeria), see Aster umbellatus
- Umbelliferae (Magnoliopsida), see Apiaceae
- umbilicata (Sulliv.) ( Valerianellawoodsiana)
- umbilicatum Parks & Hardin (Erythronium)
- Umbilicus DC., 1801 (Crassulaceae)
- umbraculifera (Sabal)
- umbraticus Sheldon (Astragalus)
- umbratilis Greenm. (Mertensia)
- umbratum (Hedw.) (Hylocomium)
- umbricola Saelan ex Norrl. (Hieracium)
- umbrosa (Schrad.) (Scapania)
- umbrosa Greene (Phacelia)
- umbrosa L. (Saxifraga)
- umbrosa Dumort. (Scrophularia)
- ?umbrosa Boynton & Beadle (Rudbeckia), see Rudbeckia speciosa
- umbrosa (Viola), see Viola selkirkii
- umbrosa Wahleenb. (Viola), see Viola selkirkii
- unalascensis (Spreng.) (Habenaria)
- unalascensis (Habernaria), see Habenaria unalascensis
- unalascensis Spreng. (Habernaria), see Habenaria unalascensis
- unalascensis Spreng. (Piperia), see Habenaria unalascensis
- unalaschcensis Bess. ( Artemisiatilesii)
- unalaschcensis (Veronica alpina var. ), see Veronica wormskjoldii var. wormskjoldii
- unalaschcensis Cham. & Schlecht. (Veronica alpina var. ), see Veronica wormskjoldii var. wormskjoldii
- ?unalaschensis (Ranunculus), see Ranunculus flammula
- unalaschkensis DC. (Erigeron uniflorus ssp. ), see Erigeron humilis
- unalaschkensis DC. (Erigeron), see Erigeron humilis
- unanimus Bailey (Rubus), see Rubus vermontanus
- Uncaria (Rubiaceae)
- uncialis Barneby (Astragalus)
- uncinatus (Hedw.) (Drepanocladus)
- uncinatus (Artabotrys)
- uncinatus D. Don (Ranunculus)
- uncinulata (Greene) ( Violaadunca)
- unciphyllum Trin. (Panicum), see Panicum tenue
- undata Jacquin (Psychotria), see Psychotria nervosa
- underwoodii Small (Trillium)
- undulata (L.) (Scapania)
- undulata Hedw. (Catharinea), see Atrichum undulatum
- undulata Raf. (Peltandra), see Peltandra virginica
- undulata Torr. (Quercus), see Quercus × pauciloba
- undulatum (Hedw.) (Plagiomnium)
- undulatum (Hedw.) (Plagiothecium)
- undulatum Brid. (Dicranum)
- undulatum (Hedw.) (Atrichum)
- undulatum Willd. (Trillium)
- undulatum (Nutt.) (Cirsium)
- undulatum Kunth (Nama)
- ?undulatum L. (rhaponticum ssp. ), see Rheum rhaponticum
- undulatum Geh. (denticulatum var. ), see Plagiothecium ruthei
- undulatum Hedw. (Mnium), see Plagiomnium undulatum
- undulatum Nutt. (Carduus), see Cirsium undulatum
- undulatum Nutt. (Cnicus), see Cirsium undulatum
- undulatum Web. & Mohr (Dicranum), see Dicranum polysetum
- undulatus L. (Aster)
- undulifolia (Nees) (Jamesoniella)
- unedo L. (Arbutus)
- unguiculata Hedw. (Barbula)
- unguiculata Lindley (Clarkia)
- ungulatus M.E. Jones ( Astragaluskentrophyta)
- unicolor Hook. (Grimmia)
- uniflora (Schult.) (Clintonia)
- uniflora Retz. (Melica)
- uniflora L. (Campanula)
- uniflora Roth (Silene)
- uniflora Kellogg (Dicentra)
- uniflora Georgi (Gentiana)
- uniflora L. (Monotropa)
- uniflora L. (Orobanche)
- uniflora (L.) (Littorella)
- uniflora (L.) (Moneses)
- uniflora (S. Watson) (Kelseya)
- uniflora Ledeb. (Potentilla)
- uniflora L. (Oldenlandia)
- ?uniflora (Bge.) ( Cotoneastervulgaris)
- uniflora (Monesis), see Moneses uniflora
- uniflora (Pirola), see Moneses uniflora
- uniflora (Pyrola), see Moneses uniflora
- uniflora (Smilacina borealis var. ), see Clintonia uniflora
- uniflora (Smilacina), see Clintonia uniflora
- uniflora L. (Aphyllon), see Orobanche uniflora
- uniflora L. (Pyrola), see Moneses uniflora
- uniflora L. (Thalesia), see Orobanche uniflora
- uniflora Muench. (Crataegus), see Crataegus tomentosa
- uniflora Roth (Oberna), see Silene uniflora
- uniflora S. Watson (Eriogynia), see Kelseya uniflora
- uniflora Wang. (Nyssa), see Nyssa aquatica
- uniflorifer Bailey (Rubus), see Rubus baileyanus
- uniflorum (Batal.) (Plagiospermum)
- uniflorus H. & A. (Calochortus)
- uniflorus L. (Erigeron)
- uniflorus Michx. (Lycopus)
- uniflorus Rydb. (spatulatus var. ), see Astragalus spatulatus
- unifolia (Michx.) (Malaxis)
- unifolia (Microstylis), see Malaxis unifolia
- unifolia Michx. (Microstylis), see Malaxis unifolia
- unifoliata (Hook.) ( Tiarellatrifoliata)
- Unifolium (Convallariaceae), see Maianthemum
- unifolium (Polygonum), see Polygonum kelloggii
- uniformis Bailey (Rubus)
- uniglandulosa (Cav.) (Polanisia)
- uniglumis (Link) (Eleocharis)
- uniglumis (Scirpus paluster ssp. ), see Eleocharis uniglumis
- uniglumis Link. (Scirpus palustris ssp. ), see Eleocharis uniglumis
- uniglumis Link. (Scirpus), see Eleocharis uniglumis
- unijuga A. Braun (Vicia)
- unilaris Bailey (Rubus obsessus var. ), see Rubus plicatifolius
- uniligulata (Solidago), see Solidago uliginosa var. uliginosa
- uniligulata DC., see Solidago uliginosa var. uliginosa
- unimaculatus Pennell (Mimulus), see Mimulus guttatus
- unioloides ?Kunth (Bromus), see Bromus willdenowii
- unioloides Willd. (Ceratochloa), see Bromus willdenowii
- uniquus Bailey (Rubus), see Rubus frondosus
- univocus (Rubus), see Rubus wheeleri
- univocus Bailey (Rubus), see Rubus wheeleri
- × uplandicum Nymam (Symphytum)
- uralensis (Rouy) ( Cicerbitamacrophylla)
- ?uralensis (Rupr) (Silene)
- urbanianus Bailey (Rubus), see Rubus flagellaris
- urbanum L. (Geum)
- urbicum L. (Chenopodium)
- urceolifer G. S. Miller (Apocynum), see Apocynum medium
- urens L. (Caryota)
- urens L. (Urtica)
- uresana (Sabal)
- urnigerum Myr. (Orthotrichum)
- urnigerum (Hedw.) (Pogonatum)
- urophylla Wall. & DC. (Embelia), see Parastemon urophyllus
- urophyllus (Wall. & DC.) (Parastemon)
- urosperma (Pinanga)
- ursina (A. Weber) ( Opuntiaerinacea)
- ursinum L. (Allium)
- ursinum (Epilobium), see Epilobium glandulosum var. tenue
- ursinus Cham. & Schlect. (Rubus)
- ursinus Gray (lentiginosus var. ), see Astragalus lentiginosus var. palans
- Urtica L. (Urticaceae)
- Urticaceae (Magnoliopsida)
- urticaefolia [= urticifolia] (Verbena), see Verbena urticifolia
- urticaefolium Reichard (Eupatorium)
- urticifolia L. (Salvia)
- urticifolia L. (Verbena)
- usitata Wall. (Melanorrhoea)
- usitata Miers. (Lecythis)
- usitatissimum L. (Linum)
- usneoides L. (Tillandsia)
- ustulata L. (Orchis)
- ustulata (Carex), see Carex atrofusca
- ustulata Spruce (Marsupella), see Marsupella sprucei
- ustulata Wahlenb. (Carex), see Carex atrofusca
- usus Bailey (Rubus), see Rubus plicatifolius
- utahense Petr. (Cirsium)
- utahensis Engelman (Agave)
- utahensis (Engelm.) ( Opuntiaerinacea)
- utahensis Wats. (Lonicera)
- utahensis (Rydb.) ( Symphoricarposoreophilus)
- utahensis (Torr.) (Astragalus)
- utahensis (Jones) ( Lathyruspauciflorus ssp. pauciflorus)
- utahensis (Wats.) ( Lupinuslepidus)
- utahensis J. Voss (Phacelia)
- utahensis Koehne (Amelanchier)
- utahensis (Rydb.) ( Heucheraparvifolia)
- utahensis (Ranunculus), see Ranunculus inamoenus
- utahensis A. DC., see Quercus gambelii var. gambelii
- utahensis Engelm. (Juniperus californica var. ), see Juniperus osteosperma
- utahensis Engelm. (occidentalis var. ), see Juniperus osteosperma
- utahensis Engelm., see Juniperus osteosperma
- utahensis Pennell (Mimulus glabratus ssp. ), see Mimulus glabratus var. glabratus
- utilie (H. B. & K.) (Brosimum)
- utilis D. Don (Betula)
- utilis Royle (Prinsepia)
- utilissima L. (Manihot)
- Utricularia L. (Lentibulariaceae)
- utriculata (Boott) ( Carexrostrata)
- utriculatum (Nutt.) (Lomatium)
- utriculatus Solander (Alopecurus)
- utriculosa L. (Gentiana)
- uva-crispa L. (Ribes)
- uva crispa (Ribes grossularia var. ), see Ribes uva-crispa var. uva-crispa
- uva-ursi (L.) (Arctostaphylos)
- uva-ursi Pursh. (Salix)
- uva ursi (Arctostaphylos), see Arctostaphylos uva-ursi
- uvidus Bailey (Rubus)
- Uvulariaceae (Liliopsida)
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Markku Savela