Washington Flora Checklist
A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium


Checklist » Excluded Taxa
Excluded Taxa

The Excluded Taxa list includes taxa that have been have been listed as occurring in Washington State, but are not considered to be a part of the state's flora by the Washington Flora Checklist authors. Taxa are excluded from the checklist for the following reasons:

» Erroneous reports for the state based on misidentified specimens or a literature error.
» Unverified reports not backed by a voucher specimen or reliable literature reference.
» Garden plants or waifs that do not appear to have naturalized.
» Names that have been have been erronously applied to taxa that occur Washington State. These names still apply to taxa that occur outside Washington and cannot be treated as nomenclatural or taxonomic synonyms.

Additional expanatory notes are provided with most taxa. Misapplied names are linked to the appropriate accepted name for Washington.
Family Scientific Name (Boldface font does not indicate native taxa)
Amaranthaceae Amaranthus graecizans L. misapplied in H&C
Amaranthaceae Beta vulgaris L. ssp. vulgaris    [FNA4]
Amaranthaceae Chenopodium hybridum L. misapplied in H&C
Amaranthaceae Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson var. oblongifolium S. Watson misapplied   [H&C]
Amaranthaceae Chenopodium urbicum L. misapplied in KZ
Amaranthaceae Corispermum hyssopifolium L. misapplied in H&C
Amaranthaceae Corispermum hyssopifolium L. misapplied in H&C
Amaranthaceae Corispermum hyssopifolium L. misapplied in H&C
Amaranthaceae Corispermum nitidum Kit. ex Schult. misapplied in H&C   [H&C]
Amaranthaceae Salicornia europaea L. misapplied in H&C
Amaranthaceae Salicornia maritima Wolff & Jefferies misapplied
Amaranthaceae Salicornia virginica L. misapplied in H&C
Amaranthaceae Salsola australis R. Br. misapplied
Amaranthaceae Salsola iberica (Sennen & Pau) Botsch. ex Czerepanov misapplied
Amaranthaceae Salsola kali L. misapplied in H&C
Amaranthaceae Suaeda depressa (Pursh) S. Watson misapplied in H&C
Amaranthaceae Suaeda fruticosa (L.) Forssk. misapplied in Abrams
Amaranthaceae Suaeda maritima (L.) Dumort. misapplied in H&C
Amaranthaceae Suaeda maritima (L.) Dumort. ssp. maritima misapplied in KZ
Apiaceae Ligusticum tenuifolium S. Wats.   [H&C, IMF3]
Apiaceae Scandix pecten-veneris L.   [H&C, VPBC1]
Araceae Wolffia punctata Griseb. misapplied in H&C
Asparagaceae Hyacinthoides hispanica (Mill.) Rothm. misapplied in BCIL6
Asparagaceae Hyacinthoides nonscripta (L.) Chouard ex Rothm. misapplied in KZ99, FNA
Asparagaceae Ornithogalum nutans L.   [FNA26]
Asteraceae Agoseris glauca (Pursh) Raf. var. agrestis (Osterh.) Q. Jones ex Cronquist misapplied
Asteraceae Centaurea biebersteinii DC. misapplied
Asteraceae Centaurea maculosa Lam. misapplied
Asteraceae Centaurea ×pratensis Thuill., non Salisb. misapplied
Asteraceae Echinops ritro L. ssp. ruthenicus (Bieb.) Nyman   [FNA19]
Asteraceae Ericameria nana Nutt.   [FNA20]
Asteraceae Erigeron peregrinus (Pursh) Greene var. peregrinus misapplied   [FNA20]
Asteraceae Erigeron trifidus Hook. misapplied in Atkinson & Sharpe (1993)
Asteraceae Gnaphalium microcephalum Nutt. in part, misapplied
Asteraceae Helenium autumnale L. var. autumnale misapplied in Peck (1961)
Asteraceae Heliopsis helianthoides (L.) Sweet var. occidentalis (T.R. Fisher) Steyerm.   [FNA21]
Asteraceae Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fernald   [FNA21]
Asteraceae Helminthotheca echioides (L.) Holub
Asteraceae Hieracium atratum Fr.
Asteraceae Hieracium laevigatum Willd. misapplied
Asteraceae Hieracium vulgatum Fr. misapplied in H&C
Asteraceae Hieracium vulgatum Fries misapplied in H&C
Asteraceae Petasites hybridus (L.) P. Gaertn., B. Mey. & Scherb. misapplied in KZ
Asteraceae Pseudognaphalium canescens (de Candolle) Anderberg   [FNA19]
Asteraceae Solidago gigantea Aiton misapplied
Asteraceae Solidago lepida DC. misapplied in Abrams
Asteraceae Tanacetum douglasii DC. misapplied
Blechnaceae Blechnum spicant (L.) Sm. ssp. nipponicum (Kunze) A. Löve & D. Löve misapplied in Ill. BC Vol. 5
Boraginaceae Cryptantha interrupta (Greene) Payson misapplied
Boraginaceae Eritrichium nanum (Vill.) Schrad. ex Gaudin var. elongatum (Rydb.) Cronquist misapplied   [H&C]
Boraginaceae Lappula fremontii (Torr.) Greene Misapplied
Boraginaceae Myosotis alpestris F.W. Schmidt misapplied   [Davis 1952]
Boraginaceae Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja   [IFBC]
Boraginaceae Myosotis latifolia Poir.
Boraginaceae Myosotis macrosperma Engelm. misapplied   [Peck]
Boraginaceae Myosotis virginica (L.) Britton, Sterns & Poggenb. misapplied   [Abrams, an illegitimate name]
Brassicaceae Arabis holboellii Hornem. var. pinetorum (Tidest.) Rollins Misapplied   [H&C]
Brassicaceae Barbarea stricta Andrz. misapplied in Abrams
Brassicaceae Boechera pinetorum (Tidestrom) Windham & Al-Shehbaz   [FNA7]
Brassicaceae Camelina sativa (L.) Crantz   [FNA7, H&C]
Brassicaceae Cardamine nuttallii Greene var. gemmata (Greene) Rollins misapplied   [KZ99]
Brassicaceae Cardamine penduliflora O.E. Schulz
Brassicaceae Draba borealis DC.   [Rollins, 1993]
Brassicaceae Draba breweri S. Watson var. cana (Rydb.) Rollins misapplied
Brassicaceae Draba juvenilis Komarov   [FNA7]
Brassicaceae Draba lanceolata Royle misapplied   [H&C]
Brassicaceae Draba lonchocarpa Rydb. var. vestita O.E. Schulz misapplied in VPPN2
Brassicaceae Lepidium ruderale L.   [FNA7, H&C]
Brassicaceae Rorippa islandica (Oeder ex Gunneras) Borbás var. islandica misapplied in H&C
Brassicaceae Rorippa obtusa (Nutt.) Britton misapplied in H&C
Brassicaceae Strigosella africana (L.) Botschantzev   [FNA7]
Brassicaceae Thlaspi alpestre L. misapplied in Peck
Cactaceae Opuntia polyacantha Haw. misapplied in H&C
Cactaceae Opuntia polyacantha Haw. var. polyacantha misapplied in KZ
Cactaceae Pediocactus simpsonii (Engelm.) Britton & Rose misapplied   [FNA4]
Calycanthaceae Calycanthus occidentalis Hook. & Arn.   [FNA3]
Campanulaceae Campanula aparinoides Pursh
Caryophyllaceae Arenaria elegans Chamisso & Schlechtendal
Caryophyllaceae Arenaria rossii R. Br. ex Richards. var. rossii Misapplied   [H&C]
Caryophyllaceae Cerastium siculum Guss. misapplied in H&C
Caryophyllaceae Silene coniflora Nees ex DC. misapplied by Abrams
Caryophyllaceae Silene multinervia S. Wats.
Caryophyllaceae Silene sargentii S. Watson   [FNA5, not in H&C]
Cornaceae Cornus canadensis L. misapplied in H&C
Crassulaceae Sedum reflexum L. (misapplied in North America)
Crassulaceae Sedum rupestre L. (misapplied in North America)
Cupressaceae Juniperus scopulorum Sarg. Misapplied in H&C
Cyperaceae Carex abscondita Mack.
Cyperaceae Carex atratiformis Britton
Cyperaceae Carex bonanzensis Britton
Cyperaceae Carex capitata L.
Cyperaceae Carex duriuscula C. A. Mey.   [FNA23]
Cyperaceae Carex festucacea Schkuhr ex Willd.
Cyperaceae Carex foenea Willd. var. foena misapplied
Cyperaceae Carex haydeniana Olney   [SPNW, FNA23]
Cyperaceae Carex lachenalii Schkuhr.   [SPNW, FNA23]
Cyperaceae Carex luzulifolia W. Boott
Cyperaceae Carex macloviana d'Urv   [FNA23]
Cyperaceae Carex multicostata Mack. misapplied
» see
Cyperaceae Carex muricata L. Misapplied
Cyperaceae Carex nervina L. H. Bailey
Cyperaceae Carex occidentalis L. H. Bailey
Cyperaceae Carex paysonis Clokey   [SPNW, FNA23]
Cyperaceae Carex podocarpa R. Br.
Cyperaceae Carex polymorpha Muhl.
Cyperaceae Carex rariflora (Wahlenb.) Sm. var. rariflora
Cyperaceae Carex richardsonii R. Br.
Cyperaceae Carex rostrata Stokes ex With. misapplied in H&C
Cyperaceae Carex scirpoidea Michx. ssp. pseudoscirpoidea (Rydb.) Dunlop   [SPNW, FNA23]
Cyperaceae Carex scopulorum Holm var. scopulorum misapplied in WA   [H&C]
Cyperaceae Carex xerantica L. H. Bailey   [SPNW, FNA23]
Cyperaceae Eleocharis bolanderi A. Gray
Cyperaceae Eleocharis elliptica Kunth
Cyperaceae Eleocharis erythropoda Steud.
Cyperaceae Eleocharis tenuis (Willd.) J. A. Schult.
Cyperaceae Lipocarpha drummondii (Nees) G. C. Tucker, J. Arnold   [FNA23]
Cyperaceae Scirpus americanus Pers. misapplied in H&C
Cyperaceae Scirpus olneyi Gray misapplied in H&C
Dryopteridaceae Dryopteris dilatata (Hoffm.) A. Gray misapplied   [Abrams, Peck]
Dryopteridaceae Polystichum mohrioides (Bory) C. Presl misapplied in H&C
Elaeagnaceae Elaeagnus argentea Pursh, non Moench Misapplied
Elatinaceae Elatine americana (Pursh) Arn. misapplied   [Abrams, Peck, H&C]
Elatinaceae Elatine triandra Schkuhr misapplied   [Abrams, Peck, H&C]
Equisetaceae Equisetum laevigatum A. Braun misapplied by Abrams & Peck
Equisetaceae Equisetum maximum Lam. misapplied in Peck
Ericaceae Arctostaphylos tomentosa (Pursh) Lindl. Misapplied
Fabaceae Lathyrus nissolia L.   [Stace, 1997]
Fabaceae Lens culinaris Medik.   [KZ99]
Fabaceae Lotus subbiflorus Lag.   [Stace, 1997]
Fabaceae Lupinus micranthus Dougl., non Guss. misapplied
Fabaceae Thermopsis gracilis Howell
Fabaceae Trifolium fucatum Lindl.   [H&C]
Fagaceae Quercus cerris L.
Haloragaceae Myriophyllum spicatum L. var. spicatum misapplied   [H&C]
Hydrangeaceae Philadelphus zelleri Hu
Hydrocharitaceae Vallisneria spiralis L. misapplied   [H&C]
Iridaceae Sisyrinchium angustifolium Mill. misapplied in H&C   [H&C]
Iridaceae Sisyrinchium angustifolium Mill. misapplied in H&C   [H&C]
Iridaceae Sisyrinchium halophilum Greene misapplied in VP1
Iridaceae Sisyrinchium segetum E.P. Bicknell misapplied in VP1
Isoetaceae Isoetes lacustris L. misapplied   [H&C]
Isoetaceae Isoetes setacea Lam. misapplied   [VPPNW1]
Juglandaceae Juglans californica S. Watson (misapplied in WA)   [FNA3]
Juncaceae Juncus balticus Willd. ssp. balticus misapplied in KZ99
Juncaceae Juncus balticus Willd. var. balticus misapplied in H&C
Juncaceae Juncus balticus Willd. var. littoralis Engelm. misapplied in VP1
Juncaceae Juncus brachyphyllus Wiegand Misapplied
Juncaceae Juncus covillei Piper var. obtusatus (Engelm.) C. L. Hitchc.
Juncaceae Juncus falcatus E. Mey. ssp. falcatus misapplied in KZ99
Juncaceae Juncus hallii Engelm. misapplied in FNA
Juncaceae Juncus lescurii Bol. misapplied   [H&C, Kz99, FNA]
Juncaceae Juncus sphaerocarpus Nees ex Funk misapplied in Peck, Abrams
Juncaceae Luzula campestris (L.) DC. var. congesta (Thuill.) E. Mey. misapplied in H&C
Juncaceae Luzula campestris (L.) DC. var. frigida Buchenau misapplied in H&C
Juncaceae Luzula congesta (Thuill.) Lej. misapplied in KZ99
Juncaceae Luzula divaricata S. Watson misapplied in H&C, FNA
Juncaceae Luzula glabrata (Hoppe) Desv. misapplied in Peck
Juncaceae Luzula multiflora (Ehrh.) Lej. ssp. congesta (Thuill.) Arcang. misapplied
Juncaceae Luzula multiflora (Ehrh.) Lej. ssp. frigida (Buchenau) Krecz. misapplied in KZ99
Juncaceae Luzula multiflora (Ehrh.) Lej. var. congesta (Thuill.) E. Mey. misapplied in Peck
Juncaceae Luzula wahlenbergii Rupr. misapplied in VP1
Lamiaceae Monarda didyma L.   [Gray's Manual]
Lamiaceae Salvia glutinosa L.   [KZ99]
Lamiaceae Salvia officinalis L.   [H&C]
Lamiaceae Scutellaria antirrhinoides Benth.   [H&C]
Lamiaceae Thymus pulegioides L.   [KZ99]
Liliaceae Calochortus lobbii sensu Purdy misapplied according to H&C
Liliaceae Calochortus tolmiei Hook. & Arn.   [FNA26, H&C]
Liliaceae Convallaria majalis L.
Lycopodiaceae Huperzia haleakalae (Brack.) Holub misapplied   [FNA2, not in H&C]
Lycopodiaceae Lycopodium hickeyi W.H. Wagner, Beitel & R.C. Moran misapplied in KZ99
Lycopodiaceae Lycopodium selago L. var. patens (P. Beauv.) Desv. misapplied in Abrams
Malvaceae Hibiscus trionum L.   [H&C]
Melanthiaceae Trillium albidum J.D. Freeman Misapplied in WA
Moraceae Fatoua villosa (Thunb.) Nakai   [FNA3]
Namaceae Nama aretioides (Hook. & Arn.) Brand   [FNA]
Nyctaginaceae Abronia fragrans Nutt. ex Hook.   [KZ99]
Nyctaginaceae Abronia umbellata Lam. var. breviflora (Standl.) L. A. Galloway in part   [FNA4]
Onagraceae Oenothera biennis L. misapplied
Onagraceae Oenothera hookeri Torr. & A. Gray misapplied
Ophioglossaceae Botrychium boreale J. Milde misapplied in H&C
Ophioglossaceae Botrychium campestre W.H. Wagner & Farrar misapplied by KZ99
Ophioglossaceae Botrychium matricariifolium (Dowell) A. Braun ex W.D.J. Koch misapplied in H&C
Ophioglossaceae Ophioglossum vulgatum L. misapplied in H&C
Orchidaceae Corallorhiza wisteriana Conrad   [FNA26, H&C]
Orchidaceae Goodyera repens (L.) R. Br. ex Ait. f.
Orchidaceae Habenaria sparsiflora S. Wats. misapplied   [H&C]
Orchidaceae Piperia leptopetala Rydb.   [KZ99]
Orchidaceae Piperia leptopetala Rydb. misapplied   [KZ99]
Orchidaceae Platanthera ×correllii Schrenk   [KZ99]
Orchidaceae Platanthera sparsiflora (S. Wats.) Schlechter misapplied in WA   [FNA26]
Orobanchaceae Aphyllon uniflorum (L.) Torr. & A. Gray   [Draft Revised H&C]
Orobanchaceae Castilleja exserta (Heller) Chuang & Heckard var. exserta    [KZ99, JPM]
Orobanchaceae Euphrasia canadensis auct. non Townsend misapplied
Orobanchaceae Euphrasia officinalis auct. non L. misapplied   [H&C]
Orobanchaceae Euphrasia tatarica auct. non Fisch. ex Spreng. misapplied
Orobanchaceae Odontites vernus Dumort. [misapplied in North America]
Orobanchaceae Triphysaria eriantha (Benth.) Chuang & Heckard ssp. eriantha    [KZ99, JPM]
Papaveraceae Argemone polyanthemos (Fedde) G.B. Ownbey   [FNA3]
Pedaliaceae Proboscidea louisianica (P. Mill.) Thellung ssp. louisianica    [KZ99]
Phrymaceae Diplacus clivicola (Greenm.) G.L. Nesom   [Phytoneuron 2012-39: 1–60.]
Phrymaceae Diplacus cusickii (Greene) G.L. Nesom   [Phytoneuron 2012-39: 1–60.]
Phrymaceae Diplacus cusickii (Greene) G.L. Nesom misapplied
Phrymaceae Mimulus cusickii (Greene) Rattan misapplied
Plantaginaceae Plantago eriopoda Torr.   [H&C]
Poaceae Agrostis perennans (Walt.) Tuckerman   [FNA24]
Poaceae Aristida longespica Poir. var. longispica misapplied (early on-line checklist)
Poaceae Bouteloua curtipendula (Michx.) Torr. var. curtipendula    [FNA24]
Poaceae Bromus laevipes Shear   [FNA24]
Poaceae Bromus polyanthus Scribn.   [FNA24]
Poaceae Calamagrostis canadensis (Michx.) Beauv. var. macouniana (Vasey) Stebbins   [FNA24]
Poaceae Calamagrostis purpurascens R. Br. misapplied in H&C   [H&C]
Poaceae Catabrosa aquatica (L.) Beauv.   [FNA24, H&C]
Poaceae Dichanthelium acuminatum (Sw.) Gould & C.A. Clark ssp. acuminatum misapplied   [KZ99]
Poaceae Dichanthelium acuminatum (Sw.) Gould & C.A. Clark ssp. thermale (Bol.) Freckmann & Lelong misapplied   [KZ99]
Poaceae ×Elyleymus aristatus (Merr.) Barkworth & D.R. Dewey   [FNA24]
Poaceae Elymus caninus (L.) L.   [FNA24]
Poaceae Festuca californica Vasey
Poaceae Festuca rubra L. ssp. arenaria (Osbeck) F. Aresch.   [FNA24]
Poaceae Panicum hirticaule J. Presl ssp. hirticaule misapplied   [KZ99]
Poaceae Pennisetum setaceum (Forssk.) Chiov.   [FNA25, not in H&C]
Poaceae Phleum ventricosum (Gouan) Schinz & Thell. Misapplied   [H&C]
» see
Poaceae Phragmites australis (Cav.) Trin. ex Steud. var. berlandieri (Fourn.) C.F. Reed
Poaceae Setaria glauca (L.) P. Beauv. misapplied   [ILBC7]
Polemoniaceae Navarretia capillaris (Kellogg) Kuntze Misapplied   [JPM2]
Polemoniaceae Phlox austromontana Coville    [JPM]
Polemoniaceae Phlox paniculata L.   [Gray's Manual]
Polygonaceae Eriogonum ovalifolium Nutt. var. ovalifolium misapplied   [H&C]
Polygonaceae Rheum rhaponticum L. misapplied
Potamogetonaceae Potamogeton compressus L. misapplied in Abrams
Potamogetonaceae Potamogeton heterophyllus Schreb. misapplied in Abrams
Potamogetonaceae Potamogeton lucens L. misapplied in Abrams
Ranunculaceae Clematis columbiana Nutt. (Torr. & A. Gray) var. columbiana Misapplied   [H&C]
Ranunculaceae Consolida ambigua (L.) P.W. Ball & Heywood Misapplied
Ranunculaceae Delphinium ambiguum L. Misapplied
Rosaceae Cotoneaster acutifolius Turcz. misapplied   [KZ99]
Rosaceae Cotoneaster bullatus Bois misapplied in BCIL4
Rosaceae Cotoneaster frigidus Wall. ex Lindl. misapplied
Rosaceae Crataegus oxyacantha L. misapplied and a rejected name   [H&C]
Rosaceae Crataegus oxyacantha L. misapplied and a rejected name   [Peck]
Rosaceae Crataegus succulenta Schrad. ex Link misapplied in KZ99
Rosaceae Fragaria ×ananassa (Weston) Duchesne ex Rozier (pro sp.)
Rosaceae Potentilla ovina Macoun var. ovina    [FNA9]
Rosaceae Potentilla rubricaulis Lehmann   [FNA9]
Rosaceae Rubus macrophyllus Weihe & Nees misapplied as used in H&C   [H&C]
Rosaceae Sanguisorba canadensis L. Misapplied in Illustrated Flora of B.C.
Rosaceae Spiraea tomentosa L.
Rubiaceae Galium humifusum M. Bieb.   [Stace, 1997]
Rubiaceae Galium multiflorum Kellogg misapplied in H&C   [H&C]
Rubiaceae Galium sylvaticum L.   [Stace, 1997]
Rubiaceae Galium tricornutum Dandy   [JPM]
Salicaceae Populus grandidentata Michx.   [FNA7, not in H&C]
Salicaceae Salix commutata misapplied
Salicaceae Salix commutata var. denudata misapplied
Salicaceae Salix lemmonii Bebb
Salicaceae Salix monticola Bebb misapplied   [H&C]
Saxifragaceae Boykinia major A. Gray Misapplied   [FNA8]
Saxifragaceae Saxifraga rivularis L.   [WNHP, KZ99]
Saxifragaceae Saxifraga stolonifera Meerb.
Saxifragaceae Therofon major (A. Gray) Kuntze Misapplied
Scrophulariaceae Mimulus coccineus Congd.    [JPM]
Scrophulariaceae Mimulus nanus Hook. & Arn. var. mephiticus (Greene) D.M. Thomps.
Scrophulariaceae Verbascum pulverulentum Vill.   [Stace, 1997]
Thelypteridaceae Thelypteris limbosperma (All.) H.P. Fuchs misapplied
Typhaceae Sparganium simplex Huds. var. simplex misapplied in VPPN1

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