Ulmaceae
Ulmus americana L.
Ulmus glabra Huds.
Ulmus procera Salisb.
Ulmus campestris L., in part; Ulmus minor, of authors not P. Mill.
Ulmus parvifolia Jacq.
Ulmus pumila L.
Ulmus rubra Muhl.
Ulmus fulva Michx.
Ulmus thomasii Sarg.
Urticaceae
Boehmeria cylindrica (L.) Sw.
Urtica cylindrica L.
Laportea canadensis (L.) Weddell
Urtica canadensis L.; Urticastrum divaricatum (L.) Kuntze
Parietaria judaica L.
Parietaria pensylvanica Muhl. ex Willd.
Parietaria obtusa Rydb. ex Small; Parietaria occidentalis Rydb.;P arietaria pensylvanica var. obtusa (Rydb. ex Small) Shinners
Pilea fontana (Lunell) Rydb.
Adicea fontana Lunell; Pilea opaca (Lunnell) Rydb.
Pilea pumila (L.) Gray var. pumila
Adicea pumila (L.) Raf.; Urtica pumila L.
Urtica dioica L. ssp. dioica
Urtica gracilis Ait. var. latifolia Farw.
Urtica gracilis Ait. ssp. gracilis
Urtica dioica var. angustifolia Schlecht.; Urtica dioica ssp.. gracilis (Ait.) Seland.; Urtica dioica var. gracilis (Ait.) C.L. Hitchc.; Urtica dioica var. procera (Muhl. ex Willd.) Weddell; Urtica gracilis Ait.; Urtica procera Muhl. ex Willd.; Urtica viridis Rydb.
Urtica urens L.
Verbenaceae
Glandularia canadensis (L.) Nutt.
Glandularia drummondii (Lindl.) Small; Glandularia lambertii (Sims) Small; Verbena canadensis (L.) Britt.; Verbena canadensis (L.) Britt. var. lambertii (Sims) Thellung; Verbena lambertii Sims
Verbena ×blanchardii Moldenke
Verbena hastata × V. simplex
Verbena bracteata Lag. & Rodr.
Verbena bracteosa Michx.
Verbena ×engelmannii Moldenke
Verbena hastata × V. urticifolia
Verbena hastata L. var. hastata
Verbena hispida (Ruiz & Pavón) Ruiz & Pavón
Glandularia hispida Ruiz & Pavón
Verbena incompta P.W. Michael
Verbena bonariensis, auct. non L., Verbena bonariensis L. var. brevibracteata Kuntze
Verbena officinalis L.
Verbena ×rydbergii Moldenke
Verbena hastata × V. stricta; Verbena ×paniculatistricata Engelm.
Verbena simplex Leym.
Verbena angustifolia Michx.
Verbena stricta Vent.
Verbena urticifolia L. var. leiocarpa Perry & Fern.
Verbena urticifolia L. var. urticifolia
Verbena urticifolia var. incarnata (Raf.) Moldenke; Verbena urticifolia var. simplex Farw.
Violaceae
Hybanthus concolor (T.F. Forst.) Spreng.
Cubelium concolor (T.F. Forst.) Raf.; Viola concolor T.F. Forst.
Viola adunca Sm. var. adunca
Viola arenaria DC., in the sense of early American authors; Viola aduncoides A. & D. Löve; Viola subvestita Greene
Viola adunca × V. labradorica
Viola affinis Le Conte
Viola latiuscula Greene; Viola sororia ssp. affinis (Le Conte) R.J. Little; Viola sororia var. affinis (Le Conte) McKinney
Viola arvensis Murr.
Viola tricolor var. arvensis (Murr.) Boiss.
Viola blanda Willd. var. blanda
Viola blanda Willd. var. palustriformis Gray
Viola incognita Brainerd; Viola incognita Brainerd var. forbesii Brainerd
Viola ×bissellii House
Viola cucullata × V. sororia; V. ×conturbita House
Viola brittoniana Pollard
Viola atlantica Britt.; Viola pedatifida G. Don ssp. brittoniana (Pollard) McKinney
Viola brittoniana × V. lanceolata
Viola brittoniana × V. pectinata
Viola canadensis L. var. canadensis
Viola ×conjugens Greene
Viola sagittata var. ovata × V. sagittata var. sagittata
Viola ×consocia House
Viola affinis × V. cucullata
Viola ×convicta House
Viola sagittata var. ovata × V. subsinuata
Viola cucullata Ait.
Viola cucullata var. microtitis Brainerd; Viola obliqua Hill
Viola ×eclipes H.E. Ballard
Viola labradorica × V. striata
Viola ×fernaldii House
Viola sagittata var. ovata × V. sororia; Viola ×parca House
Viola ×filicetorum Greene
Viola affinis × V. sororia; Viola ×champlainensis House; Viola×columbiana House
Viola ×greenmanii House
Viola cullulata × V. palmata
Viola hirsutula Brainerd
Viola ×hollickii House
Viola affinis × V. sagittata var. ovata
Viola ×insessa House
Viola cucullata × V. nephrophylla
Viola ×insolita House
Viola brittoniana × V. sororia
Viola japonica Langsd. ex Ging.
Viola labradorica Schrank
Viola adunca var. minor (Hook.) Fern.; Viola conspersa Reichenb.
Viola lanceolata L. ssp. lanceolata
Viola ×malteana House
Viola labradorica × V. rostrata
Viola ×mulfordae Pollard
Viola brittoniana × V. sagittata var. ovata
Viola ×napae House
Viola nephrophylla × V. sororia
Viola nephrophylla Greene
Viola ×notabilis Bickn.
Viola brittoniana × V. cucullata
Viola novae-angliae House
Viola sororia var. novae-angliae (House) McKinney
Viola odorata L.
Viola pallens (Banks ex DC.) Brainerd
Viola macloskeyi Lloyd ssp. pallens (Banks ex DC.) M.S. Baker; Viola rotundifolia var. pallens Banks ex DC.
Viola palmata L.
Viola palmata var. dilatata Ell.; Viola triloba Schwein.
Viola palustris L. var. palustris
Viola pectinata Bickn.
Viola brittoniana var. pectinata (Bickn.) Alexander
Viola pedata L.
Viola pedata var. concolor Holm ex Brainerd; Viola pedata var. lineariloba DC.
Viola ×populifolia Greene
Viola palmata × V. sororia
Viola ×porteriana Pollard
Viola cucullata × V. sagittata var. ovata
Viola primulifolia L.
Viola primulifolia var. acuta (Bigelow) Torr. & Gray
Viola pubescens Ait. var. pubescens
Viola eriocarpon (Nutt.) Schwein.; Viola pensylvanica Michx.; Viola pubescens var. eriocarpon Nutt.
Viola pubescens Ait. var. scabriuscula Torr. & Gray
Viola eriocarpon (Nutt.) Schwein. var. leiocarpon Fern. & Wieg.; Viola pensylvanica Michx. var. leiocarpon (Fern. & Wieg.) Fern. Viola pubescens var. leiocarpon (Fern. & Wieg.) Seymour
Viola renifolia Gray
Viola renifolia var. brainerdii (Greene) Fern.
Viola ×robinsoniana House
Viola palmata × V. sagittata var. ovata
Viola rostrata Pursh
Viola rotundifolia Michx.
Viola clandestina Pursh
Viola ×ryoniae House
Viola cucullata × V. subsinuata
Viola sagittata Ait. var. ovata (Nutt.) Torr. & Gray
Viola fimbriatula Sm.
Viola sagittata Ait. var. sagittata
Viola emarginata (Nutt.) Le Conte; Viola emarginata (Nutt.) Le Conte var. acutiloba Brainerd; Viola sagittata var. subsagittata (Greene) Pollard
Viola selkirkii Pursh ex Goldie
Viola sororia Willd.
Viola floridana Brainerd; Viola latiuscula Greene; Viola palmata var.sororia (Willd.) Pollard; Viola septentrionalis Greene
Viola sororia × V. subsinuata
Viola striata Ait.
Viola ×subaffinis House
Viola affinis × V. nephrophylla
Viola subsinuata Greene
Viola palmata, of authors not L.
Viola tricolor L.
Viola ×variabilis Greene
Viola palmata × V. subsinuata
Viscaceae
Arceuthobium pusillum Peck
Razoumofskya pusilla (Peck) Kuntze
Vitaceae
Ampelopsis aconitifolia Bunge
Ampelopsis glandulosa (Wallich) Momiy. var. brevipedunculata (Maxim.) Momiy.
Ampelopsis brevipedunculata (Maxim.) Trautv.; Ampelopsis glandulosa (Wallich) Momiy. var. brevipedunculata (Maxim.) Momiy.; Ampelopsis heterophylla (Thunb.) Sieb. & Zucc. var. amurensis Planch.; Ampelopsis heterophylla (Thunb.) Sieb. & Zucc. var. brevipedunculata C.L. Li.; Cissus brevipedunculata Maxim.; Vitis brevipedunculata (Maxim.) Dippel.
Parthenocissus inserta (Kerner) Fritsch
Ampelopsis quinquefolia (L.) Michx. var. vitacea Knerr; Parthenocissus vitacea (Knerr) A.S. Hitchc.; Psedera vitacea (Knerr) Greene
Parthenocissus quinquefolia (L.) Planch.
Hedera quinquefolia L.; Ampelopsis quinquefolia (L.) Michx.;Parthenocissus quinquefolia var. hirsuta (Pursh) Planch.; Psedera quinquefolia (L.) Greene; Vitis quinquefolia (L.) Lam.
Parthenocissus tricuspidata (Sieb. & Zucc.) Planch.
Ampelopsis tricuspidata Sieb. & Zucc.
Vitis aestivalis Michx.
Vitis aestivalis var. argentifolia (Munson) Fern.; Vitis aestivalis Michx. var. bicolor Deam;Vitis argentifolia Munson; Vitis bicolor Le Conte; Vitis lecontiana House; Vitis lincecumii Buckl. var. glauca Munson
Vitis labrusca L.
Vitis labrusca var. subedentata Fern.
Vitis ×novae-angliae Fern.
Vitis labrusca × V. riparia
Vitis palmata Vahl
Vitis rubra Michx.
Vitis riparia Michx.
Vitis riparia var. praecox Engelm. ex Bailey; Vitis riparia var. syrticola(Fern. & Wieg.) Fern.; Vitis vulpina ssp. riparia (Michx.) R.T. Clausen;Vitis vulpina var. praecox (Engelm. ex Bailey) Bailey; Vitis vulpina var.syrticola Fern. & Wieg.
Vitis vinifera L.
Vitis vulpina L.
Vitis cordifolia Michx.