Invasive Exotic Plants of Ventura County, California By ... · Invasive Exotic Plants of Ventura County, California By David L. Magney Botanical Name Common Name Habit Abutilon theophrasti

Invasive Exotic Plants of Ventura County, California

By David L. Magney

Botanical Name Common Name Habit

Abutilon theophrasti Medikus Velvet-leaf SAchnatherum brachychaetum (Godr.) Barkworth Shortbristled Needlegrass PGAcroptilon repens (L.) DC. Russian Knapweed PHAgave attenuata Salm-Dyck. Century Plant SAgrostis viridis Gouan Green Bentgrass PGAilanthus altissima (Miller) Swingle Tree-of-Heaven TAira caryophyllea L. Silver Hairgrass AGAlbizzia julibrissin Durazz. Silk Tree, Mimosa Tree TAllium neapolitanum Cirillo Onion PGAmaranthus albus L. Pigweed Amaranth AHAmaranthus deflexus L. Low Amaranth AHAmaranthus hybridus L. Hybrid Amaranth AHAmaranthus retroflexus L. Red-root Amaranth AHAmmi majus L. Bishop Weed AHAmmophila arenaria (L.) Link European Beachgrass PGAnagallis arvensis L. Scarlet Pimpernel AHAnredera cordifolia (Ten.) Steenis Mignonetta Vine PVAnthemis cotula L. Mayweed AHAnthriscus caucalis M. Bieb. Bur-chervil AHApium graveolens L. Celery AHAptenia cordifolia (L. f.) N.E. Br. Apple Red Iceplant SAraujia sericofera Brot. Bladder-flower PVArrhenatherum elatius (L.) J. Presl & C. Presl Tall Oat Grass PGArtemisia biennis Willd. Biennial Wormwood BHArundo donax L. Giant Reed SAsparagus asparagoides (L.) W.F. Wight Smilax Asparagus PGAsparagus officinalis L. ssp. officinalis Asparagus PGAtriplex rosea L. Tumbling or Red Oracle AHAtriplex semibaccata R.Br. Australian Saltbush SAtriplex suberecta I. Verd. Australian Annual Saltbush SAvena barbata Link. Slender Wild Oat AGAvena fatua L. Wild Oat AGAvena sativa L. Cultivated Oat AGBarbarea vulgaris W.T. Aiton Common Wintercress BHBassia hyssopifolia (Pallas) Kuntze Five-hook, Smother-Weed AHBellis perennis L. English Daisy PHBeta vulgaris L. Common Beet PHBidens pilosa L. var. pilosa Common Beggar-ticks PHBrachypodium distachyon (L.) Beauv. Short-pediceled Brome AGBrassica kaber Wheeler Chardock AHBrassica napus L. ssp. napus Mustard BHBrassica nigra (L.) Koch Black Mustard AH

VCNaturalizedNonnativePlants.xls 8/18/2011 9:27 PM Edition 2001.1


By David L. Magney


Brassica oleracea L. var. oleracea Cabbage BHBrassica rapa L. Field Mustard AHBrassica tournefortii Gouan Sahara Mustard AHBriza minor L. Little Quakinggrass AGBromus arenarius Labill. Australian Brome AGBromus bereroanus Colla Chilean Brome PGBromus catharticus Vahl Rescue Grass PGBromus diandrus Roth. ssp. diandrus Ripgut Grass AGBromus erectus Hudson Erect Brome PGBromus hordeaceus L. ssp. hordeaceus Soft Chess AGBromus hordeaceus ssp. divaricatus (Bonnier & Layens) Kerguelen Soft Brome AGBromus inermis Leyss. ssp. inermis Smooth Brome PGBromus madritensis L. ssp. madritensis Madrid Brome AGBromus madritensis ssp. rubens (L.) Husnot Red Brome AGBromus sitchensis Trin. Sitka Brome PGBromus stamineus Desv. South American Brome PGBromus sterilis L. Poverty Brome AGBromus tectorum L. var. tectorum Downy Brome, Cheat Grass AGBromus trinii Desv. Chilean Chess AGCakile maritma Scop. ssp. maritima European Searocket AHCalendula officinalis L. Pot Marigold AHCallistemon viminalis (Soland. ex Gaertn.) Cheel. Weeping Bottle Brush TCamelina microcarpa Andrz. False Flax BHCapsella bursa-pastoris (L.) Medikus var. bursa-pastoris Shepherd’s Purse AHCardaria chalepensis Hand.-Mazz. Lens-podded Hoary Cress PHCardaria pubescens (C. Meyer) Jamol. White-top PHCarduus pycnocephalus L. ssp. pycnocephalus Italian Thistle AHCarduus tenuiflorus W. Curtis Plumeless Thistle AHCarpobrotus chilensis (Molina) N.E. Br. Sea Fig SCarpobrotus edulis (L.) N.E. Br. Hottentot Fig SCarthamus creticus L . Smooth Distaff Thistle PHCarthamus tinctorius L. Safflower PHCenchrus echinatus L. Southern Sandbur AGCenchrus spinifex Cav. Coastal Sandbur PGCentaurea calcitrapa L. Red or Purple Star-thistle BHCentaurea cyanus L. Bachelor’s Button AHCentaurea melitensis L. Tocalote, Napa Thistle AHCentaurea solstitialis L. Yellow Star-thistle AHCentaurea stoebe ssp. micranthos (Gugler) Hayek Spotted Knapweed BHCerastium glomeratum Thuill. Mouse-ear Chickweed AHChamaesyce maculata (L.) Small Spotted Spurge AHChamaesyce nutans (Lag.) Small Eyebane AH



By David L. Magney


Chamaesyce prostrata (Ait.) Small Prostrate Spurge AHChamaesyce serpens (H.B.K.) Small Matted Sandmat AHChenopodium album L. White Goosefoot AHChenopodium ambrosioides var. suffruticosum (Willd.) Aellen. Perennial Mexican Tea AHChenopodium chenopodioides (L.) Aellen. South American Pigweed AHChenopodium macrospermum var. halophilum (Philippi) Standley Coast Goosefoot AHChenopodium missouriense Aellen Missouri Lambsquarters AHChenopodium murale L. Nettle-leaved Goosefoot AHChenopodium strictum ssp. glaucophyllum (Aellen.) H.A. Wahl Whiteleaf Goosefoot AHChenopodium strictum Roth ssp. strictum Goosefoot AHChloris gayana Kunth Rhodegrass PGChloris virgata Sw. Windmillgrass PGChondrilla juncea L. Rush Skeletonweed PHChorispora tenella (Pall.) de Candolle Common Blue Mustard AHChrysanthemum coronarium L. Garland Chrysanthemum PHChrysanthemum parthenium Bernh. Chrysanthemum, Feverfew PHCichorium intybus L. Chicory PHCirsium arvense (L.) Scop. Canada Thistle PHCirsium ochrocentrum A. Gray var. ochrocentrum Yellow-spine Thistle PHCirsium vulgare (Savi) Tenore Common or Bull Thistle BHCistus ladanifer L. Gum Rock-rose SCitrullus colocynthis var. lanatus (Thumb.) Matsum & Nakai Watermelon AHCnicus benedictus L. Blessed Thistle BHConium maculatum L. Poison Hemlock AHConringia orientalis (L.) Dumortier Rabbits-ear PHConvolvulus arvensis L. Bindweed PVConyza bonariensis (L.) Cronq. South American Horseweed AHConyza floribunda Kunth Many-flowered Horseweed AHCoriandrum sativum L. Coriandra, Cilantro AHCoronopus didymus (L.) Smith Wart Cress AHCortaderia jubata (Lemoine) Stapf Andean Pampas Grass PGCortaderia selloana (Schultes) Aschers. & Graegner Pampas Grass PGCotula australis (Sieber) Hooker f. Australian Brass-buttons AHCotula coronopifolia L. African Brass-buttons AHCrassula tillea Lester-Garl. Water Pigmy-weed AHCrypsis schoenoides (L.) Lam. Swamp Grass AGCrypsis vaginiflora (Forsskal) Opiz Prickle Grass AGCucurbita pepo L. var. pepo Field Pumpkin AHCynara cardunculus L. ssp. cardunculus Cardoon PHCynodon dactylon (L.) Pers. Bermuda Grass PGCynosurus echinatus L. Hedgehog Dogtail AGCyperus involuratus Rottb. Alternate-leaf Flatsedge PG



By David L. Magney


Cytisus scoparius (L.) Link Scotch Broom SCytisus striatus (Hill) Rothm. Portuguese Broom SDactylis glomerata L. Orchard Grass PGDatura stramonium L. Jimson Weed AHDaucus carota L. Carrot, Queen Ann’s Lace AHDelosperma litorale (Kensit) L. Bolus Seaside Delosperma SDescurainia sophia (L.) Webb Tansy Mustard AHDigitaria ischaemum (Schreber) Muhlenberg Smooth Crabgrass AGDigitaria sanguinalis (L.) Scop. Hairy Crabgrass PGDiplotaxis muralis (L.) de Candolle Annual Wall-rocket AHDisphyma crassifolium (L.) L. Bolus Iceplant SDittrichia graveolens (L.) W. Greuter Stinkwort AHDrosanthemum floribundum (Haw.) Schwantes Dew Flower Iceplant SDysphania ambrosioides (L.) Mosyakin & Clemants Mexican Tea AHDysphania botrys (L.) Mosyakin & Clemants Jerusalem Oak AHDysphania multifida (L.) Mosyakin & Clemants Cut-leaf Goosefoot AHDysphania pumilio (R. Br.) Mosyakin & Clemants Tasmanian Goosefoot AHEchinochloa colona (L.) Link Awnless Barnyard Grass AGEchinochloa crus-galli (Kunth) Schultes Barnyard Grass AGEchinochloa crus-pavonis (L.) P. Beauv. var. crus-galli Barnyard Grass AGEchinochloa frumentacea Link Billion-dollar Barnyard Grass AGEchium candicans L.f. Pride-of-Madeira SEchium plantagineum L. Salvation Jane SEhrharta calycina Sm. Perennial Veldtgrass PGEhrharta erecta Lam. Erect Veldtgrass PGEichhornia crassipes (Mart.) Solms Water Hyacinth PGEleusine coracana ssp. africana (Kennedy-O'Byrne) Hilu & de Wet African Finger Millet AGElymus repens (L.) Gould Quackgrass PGElytrigia intermedia (Host) Nevski ssp. intermedia Intermediate Wheatgrass PGEmex spinosa (L.) Campdera Devil’s Thorn AHEragrostis barrelieri Daveau Lovegrass PGEragrostis cilianensis (All.) Janchen Lovegrass PGEragrostis superba Peyr. Wilman Lovegrass PGErodium botrys (Cav.) Bertol. Broadleaf Filaree AHErodium bracycarpum (Godron) Thell. Short-beaked Filaree AHErodium cicutarium (L.) L’Her. Redstem Filaree AHErodium moschatum (Burm. F.) L’Her. var. moschatum Whitestem Filaree AHEucalyptus camaldulensis Dehnhardt River Red Gum TEucalyptus globulus Labill. var. globulus Tasmanian Blue Gum TEuphorbia lathyris L. Gopher Spurge AHEuphorbia peplus L. Petty Spurge AHEuphorbia terracina L. var. terracina False Caper PH



By David L. Magney


Festuca arundinacea Schreber Tall or Alta Fescue PGFicus carica L. Common Edible Fig TFilago gallica L. Woolly Filago AHFoeniculum vulgare P. Mill. Sweet Fennel PHGalinsoga parviflora Cav. Gallant Soldier AHGalium parisiense L. Wall Bedstraw AHGastridium phleoides (Nees & Meyen) C.E. Hubb. Nit Grass AGGaura drummondii (Spach) Torrey & A. Gray Drummund Gaura PHGaura sinuata Ser. Wavy-leaved Gaura PHGazania linearis (Thunb.) Druce Gazania PHGenista monspessulana (L.) L. Johnson French Broom SGeranium core-core Steud. Geranium PHGeranium dissectum L. Dissected Geranium AHGeranium molle L. Annual Cranesbill AHGeranium pusillum Burm. f. Geranium AHGeranium retrorsum L.'Her. Annual Cransbill AHGeranium rotundifolium L. Roundleaf Geranium AHGrevillea robusta A.Cunn. ex R.Br. Silk Oak TGuizotia abyssinica (L. f.) Cass. Ramtilla AHGypsophila paniculata L. Baby's Breath PHHedera canariensis Willd. Algerian Ivy PVHedera helix L. English Ivy PVHedypnois cretica (L.) Dum.-Cours. Crete Hedypnois AHHelminthotheca echioides (L.) Holub Bristly Ox-tongue PHHerniaria hirsuta ssp. cinerea (DC.) Coutinho Hairy Herniawort AHHirschfeldia incana (L.) Lagr.-Fossat Summer Mustard PHHolcus lanatus L. Common Velvet Grass PGHordeum marinum ssp. gussoneanum (Parl.) Thell. Mediterranean Barley AGHordeum murinum L. ssp. murinum Winter Barley AGHordeum murinum ssp. glaucum (Steudel) Tzvelev Summer Barley AGHordeum murinum ssp. leporinum (Link) Arcang. Hare Barley AGHordeum vulgare L. var. vulgare Common Barley AGHordeum vulgare var. trifurcatum (Schlecht) Alefeld Beardless Barley AGHumulus lupulus L. Hops PVHypochaeris glabra L. Smooth Cat’s-ear AHHypochaeris radicata L. Hairy or Rough Cat’s-ear AHIpomoea indica (Burm. f.) Merr. Oceanblue Morning-glory PVIpomoea purpurea (L.) Roth Common Morning-glory PVIris pseudacorus L. Yellow Iris PGJuglans regia L. ssp. regia English Walnut TKickxia elatine (L.) Dumort. Arrowleaf Fluellin AHKickxia spuria (L.) Dumort. Fluellin AH



By David L. Magney


Kochia scoparia (L.) Schrader Common Kochia AHLactuca saligna L. Willow Lettuce AHLactuca serriola L. Prickly [Wild] Lettuce AHLamarckia aurea (L.) Moench Goldentop AGLamium amplexicaule L. Henbit, Dead Nettle AHLathyrus odoratus L. Sweet Pea AVLepidium campestre (L.) R.Br. Field Peppergrass AHLepidium draba (L.) Desv. Heart-podded Hoary Cress PHLepidium latifolium L. Broadleaf Peppergrass PHLepidium pinnatifidum Ledebour Featherleaf Peppergrass AHLeucanthemum vulgare Lam. Ox-eye Daisy AHLigustrum lucidum W.T. Aiton f. Glossy Privet SLinaria bipartita (Vent.) Willd. Toadflax AHLobularia maritima (L.) Desv. Sweet Alyssum PHLogfia gallica (L.) Coss. & Germ. Daggerleaf Cottonrose AHLolium multiflorum Lam. Italian Ryegrass AGLolium perenne L. Perennial Ryegrass PGLolium rigidum Gaudin ssp. rigidum Wimmera Ryegrass AGLolium temulentum L. Darnel AGLonicera japonica Thunb. Japanese Honeysuckle PVLotus corniculatus L. Birdsfoot Trefoil PHLotus tenuis Waldst. & Kit. Trefoil PHLudwigia hexapetala (Hook. & Arn.) Zardini, Gu & Raven Uraguayan Water Primrose PHLudwigia peploides (Kunth) Raven ssp. peploides Floating Seedbox PHLycopersicon esculentum P. Mill. Cherry Tomato AHLythrum hyssopifolium L. Hyssop Loosestrife AHMalephora crocea (Jacq.) Schwantes var. crocea Croceum Iceplant SMalva arborea (L.) Webb & Berthel. Tree-mallow PHMalva neglecta Wallr. Common Mallow, Cheeses AHMalva nicaeensis All. Bull Mallow AHMalva parviflora L. Cheeseweed AHMalva pseudolavatera Webb & Berthel. False Tree-mallow SMalva sylvestris L. High Mallow AHMalva verticillata var. crispa L. Crisped Mallow BHMarrubium vulgare L. White Horehound PHMedicago lupulina L. Black Medick AHMedicago minima (L.) Bartal. Burclover AHMedicago polymorpha L. Common Burclover AHMedicago praecox DC. Alfalfa AHMedicago sativa L. Alfalfa AHMelaleuca armillaris (Soland. ex Gaertn.) Smith Bracelet Honey Myrtle SMelilotus alba Medikus White Sweetclover AH



By David L. Magney


Melilotus indica (L.) All. Yellow Sweetclover AHMelilotus officinalis (L.) Lam. Yellow Sweetclover AHMentha arvensis L. Field Mint PHMentha spicata L. var. spicata Spearmint PHMesembryanthemum crystallinum L. Crystalline Iceplant AHMesembryanthemum nodiflorum L. Slenderleaf Iceplant AHMirabilis jalapa L. Four O’Clock SModiola caroliniana (L.) G. Don. Wheel-Fruit Mallow AHMolluga verticillata L. Indian Chickweed AHMorus alba L. White Mulberry TMyoporum laetum Forster f. Myoporum, Wax Myrtle TMyriophyllum aquaticum (Vell. Conc.) Verdc. Parrot’s Feather PHNassella tenunissima (Trin.) Barkworth Mexican Feathergrass PGNerium oleander L. Oleander SNicotiana glauca Graham Tree Tobacco TOenothera biennis L. Common Evening-Primrose BHOenothera speciosa Nuttall Common Evening-Primrose AHOlea europea L. European Olive TOnopordum acanthium L. Scotch Thistle BHOpuntia ficus-indica (L.) Miller Indian Fig SOrobanche ramosa L. Branched Broomrape PHOsteospermum ecklonis (DC.) Norl. African Daisy PHOsteospermum fruticosum (L.) Norl. Trailing African Daisy PHOxalis corniculata L. Creeping Wood Sorrel PHOxalis crassipes Urb. Pink Wood Sorrel or Oxalis PHOxalis pes-caprae L. Bermuda Buttercup PHPanicum mileaceum L. Broom Corn Millet AGParapholis incurva (L.) C.E. Hubb. Sickle Grass AGPaspalum dilatatum Poiret Dallis Grass PGPaspalum notatum var. saurae Parodi Dallisgrass PGPelargonium peltatum (L.) L’Her. ex Aiton Ivy Geranium PHPennisetum clandestinum Chiov. Kikuyu Grass PGPennisetum setaceum Forskal African Fountain Grass PGPennisetum villosum R.Br. Fountain Grass PGPetrorhagia dubia (Raf.) G. Lopez & Romo Hairypink AHPetunia parviflora Juss. Petunia AHPhalaris aquatica L. Harding Canarygrass AGPhalaris canariensis L. Canarygrass PGPhalaris caroliniana Vasey Canarygrass AGPhalaris minor Retz Littleseed Canarygrass AGPhalaris paradoxa L. Hood Canarygrass AGPhleum pratense L. Cultivated Timothy Grass PG



By David L. Magney


Phoenix canariensis Chabaud Canary Island Date Palm TPhysalis philadelphica Lam. Tomatillo AHPhysalis viscosa var. cinerascens (Dunal) Waterfall Grape Ground-cherry AHPiptatherum miliaceum (L.) Cosson Smilo Grass PGPlantago coronopus L. Cut-leaved Plantain AHPlantago lanceolata L. Narrowleaf or English Plantain PHPlantago major L. Broadleaf Plantain PHPoa palustris L. Palustrine Bluegrass PGPoa pratensis L. ssp.pratensis Kentucy Bluegrass PGPolycarpon tetraphyllum (L.) L. Four-leaved Allseed AHPolygonum arenastrum Boreau Common Knotweed AHPolygonum argyrocoleon Steudel ex Kunze Silver-sheathed Knotweed AHPolygonum aviculare ssp. depressum Meisner in A.P. DC. & A.L.P.P. DC. Doorweed AHPolygonum aviculare ssp. neglectum (Besser) Arcangeli Doorweed AHPolygonum capitatum D. Don Capitate Knotweed PHPolygonum convolvulus L. Morning-glory Smartweed PHPolygonum persicaria L. Lady's Thumb AHPolygonum ramosissimum Michaux Yellow-flowered Knotweed AHPolypogon australis Brongn. Chilean Beardgrass PGPolypogon interruptus Kunth Ditch Beardgrass PGPolypogon maritimus Willd. var. maritiumus Mediterranean Beardgrass AGPolypogon monspeliensis (L.) Desf. Rabbistsfoot Annual Beardgrass AGPopulus alba L. White Poplar TPopulus nigra L. var. italica Moench Italian Poplar TPortulaca oleracea L. Common Purslane AHPotentilla norvegica (L.) Scop. Rough Cinquifoil PHPseudognaphalium luteoalbum (L.) Hilliard & B.L. Burtt Cudweed Everlasting PHPseudognaphalium roseum (Kunth) Anderberg Rosy Rabbit-tobacco PHPunica granatum L. Pomegranate SRaphanus raphanistrum L. Wild Radish PHRaphanus sativus L. Wild Radish PHReseda alba L. White Mignonette PVRicinus communis L. Castor Bean SRobinia pseudo-acacia L. Black Locust TRorippa sylvestris (L.) Besser Creeping Yellowcress PHRubus armeniacus Focke Himalayan Blackberry PVRubus pensilvanicus Poiret Pensylvania Blackberry PVRumex acetosella L. Sheep Sorrel PHRumex conglomerates Murray Green Dock PHRumex crispus L. Curly Dock PHRumex kerneri Borbas Kerner’s Dock PHSagina apetala L. ssp. apetala Dwarf Pearlwort AH



By David L. Magney


Salpichroa origanifolia (Lam.) Baill. Salpichroa PHSalsola australis R.Br. Australian Thistle AHSalsola gobicola Iljin Gobi Thistle AHSalsola paulsenii Litv. Barbwire Thistle AHSalsola tragus L. Russian Thistle AHScandix pecten-veneris L. Venus' Needle AHSchinus molle L. Peruvian Pepper Tree TSchinus terebenthifolius Raddi Brazilian Pepper Tree TSchismus arabicus Nees Arabian Grass, Abu Mashi AGSchismus barbatus (L.) Thell. Mediterranean Grass AGSenecio mikanioides Walp. Cape or German Ivy PVSenecio vulgaris L. Common Groundsel AHSetaria adhaerens (Forssk.) Chiov. Bur Bristlegrass AGSetaria pumila (Poir.) Roem. & Schult. ssp. pumila Yellow Foxtail AGSetaria verticillata (L.) Beauv. Hooked Bristlegrass AGSetaria viridis (L.) Beauv. var. viridis Green Foxtail Grass AGSherardia arvensis L. Field Madder AHSilene coniflora Nees ex Otth Many-veined Campion AHSilene dictotoma Ehrh. ssp. dichostoma Forked Catchfly AHSilene gallica L. Windmill Pink AHSilybum marianum (L.) Gaertner Milk Thistle AHSinapis arvensis L. White Charlock AHSisymbrium altissimum L. Tumble Mustard AHSisymbrium irio L. London Rocket AHSisymbrium occidentale (L.) Scop. Hedge Mustard AHSisymbrium officinale L. Hedge Mustard AHSolanum americanum Miller White Nightshade AHSolanum carolinense L. Carolina Horse Nettle PHSolanum elaeagnifolium Cav. Silverleaf Horse-nettle PHSolanum lanceolatum Cav. Lanceleaf Nightshade AHSolanum nigrum L. Black Nightshade PHSolanum rostratum Dunal Buffalo-bur PHSoleirolia soleirolii (Requien) Dandy Baby-tears PHSoliva sessilis Ruiz Lopez & Ravon Common Soliva AHSonchus asper (L.) Hill ssp. asper Prickly Sow-thistle AHSonchus oleraceus L. Common Sow-thistle AHSonchus tenerrimus L. Sow-thistle AHSorghum bicolor (L.) Moench ssp. bicolor Sorghum AGSorghum bicolor ssp. drummondii (Nees ex Steud.) de Wet & Harlan Sudangrass PGSorghum halapense (L.) Pers. Johnson Grass AGSpartium junceum L. Spanish Broom SSpergula arvensis L. ssp. arvensis Stickwort, Starwort AH



By David L. Magney


Spergularia bocconii (Scheele) Merino Sandspurrey AHSpergularia rubra (L.) J.S. Presl & C. Presl Purple or Red Sandspurrey AHSpergularia salina (Pers.) Cambess. Hairy Sandspurrey PHSpergularia villosa (Pers.) Cambess. Hairy Sandspurrey PHStellaria media (L.) Vill. Common Chickweed AHStellaria pallida (Dumort.) Pire Pallid Chickweed AHStenotaphrum secundatum (Walter) Kuntze St. Augustine Grass PGTaeniantherum caput-medusae (L.) Nevski Medusa Head AGTamarix chinensis Lour. Fivestem Tamarisk STamarix gallica L. French Tamarisk STamarix parviflora DC. Smallflower Tamarisk TTamarix ramosissima Ledeb. Tamarisk TTaraxacum officinale F.H. Wigg. Common Dandelion AHTetragonia tetragonioides (Pallas) Kuntze New Zealand Spinach AHThonopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang Tall Wheatgrass PGTorilis arvensis (Hudson) Link Hedge-parsley AHTorilis nodosa (L.) Gaertner Rattlesnake Weed AHTradescantia fluminensis Velloso Small-leaf Spiderwort PGTragopogon porrifolius L. Salsify AHTribulus terrestris L. Puncture Vine, Caltrop AHTrifolium dubium Sibth. Little Hop Clover AHTrifolium fragiferum L. Strawberry Clover PHTrifolium repens L. White Clover PHTriticum aestivum L. Cultivated Wheat AGTropaeolum majus L. Garden Nasturtium PHUlmus parvifolia Jacquin Chinese Elm, Lacebark Elm TUlmus pumila L. Siberian Elm TUrospermum picroides (L.) Scop. ex Schmidt Prickly Goldenfleece PHUrtica urens L. Dwarf or Dog Nettle AHVerbascum blattaria L. Moth Mullein BHVerbascum virgatum Stokes Wand Mullein BHVerbena tenuisecta Briq. Paraguay Verbena PHVerbesina encelioides ssp. exauriculata Robinson & Greenman Golden Crownbeard PHVeronica anagallis-aquatica L. Water or Common Speedwell PHVeronica arvensis L. Common Speedwell PHVeronica catenata Pennell Water Speedwell PHVeronica persica Poiret Persian Speedwell AHVicia benghalensis L. Mediterranean Vetch AVVicia faba L. Broad or Horse Bean AVVicia sativa L. ssp. sativa Common Vetch AHVicia sativa ssp. nigra (L.) Erhart Narrow-leaved Vetch AHVicia villosa Roth ssp. villosa Hairy or Winter Vetch AV



By David L. Magney


Vicia villosa ssp. varia (Host) Corbière Hairy or Winter Vetch AVVinca major L. Greater Periwinkle PVVinca minor L. Lesser Periwinkle PVVulpia bromoides (L.) S.F. Gray Slender Fescue AGVulpia myuros (L.) C. Gnelin var. myuros Rattail Fescue AGVulpia myuros var. hirsuta (Hackel) Asch. & Graebner Foxtail Fescue AGWashingtonia robusta H. Wendl. Mexican Fan Palm TZantedeschia aethiopica (L.) Springel Calla Lily PG

Notes: Scientific nomenclature follows the Flora of North America (1993-2011) and Hickman (1993).

Common names follow Abrams and Ferris (1960), Neihaus and Ripper (1976), and DeGarmo (1980).

An "*" indicates non-native taxa that have become naturalized or persist without cultivation.

A ? indicates taxa that are expected to occur in the County but have not been seen.

Habit definitions:

AF = annual fern or fern ally. PG = perennial grass or graminoid.

AG = annual grass or graminoid. PH = perennial herb.

AH = annual herb. PV = perennial vine.

BH = biennial herb. S = shrub.

PF = perennial fern or fern ally. T = tree.

Each plant is supported by one or more voucher specimens at one or more public herbaria.

Another 206+ nonnative plants known to occur in Ventura County are considered escaped exotics rather than invasive.

List developed and copyrighted by David L. Magney 2011. Edition 2011.1


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Invasive Exotic Plants of Ventura County, California By ... · Invasive Exotic Plants of Ventura County, California By David L. Magney Botanical Name Common Name Habit Abutilon theophrasti