Invasive Plants of the Central Coast

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An environmental summary created by the ENVS 560/L Watershed Systems class at CSUMB.

This page is a list of non-native, invasive plants that fall under one of two categories: 1) plant species being actively managed, or proposed for future control by organizations involved in the conservation and restoration of open space in California's Central Coast Region, or 2) plant species recommended for management and observation at a county-wide and regional scales. Information regarding the presence of a species by county was gathered from the Calflora Observation Hotline.

Key to abbreviations

Central Coast Counties Agencies
Santa Clara SCL BLM United States Bureau of Land Management (BLM)
Santa Cruz SCR RCDMC Resource Conservation District of Monterey County (RCDMC)
San Benito SBT MPRPD Monterey Peninsula Regional Park District (MPRPD)
Monterey MON CA State Parks California Department of Parks and Recreation
San Luis Obispo SLO ESF Elkhorn Slough Foundation (ESF)
Santa Barbara SB ESNERR Elkhorn Slough National Estuarine Research Reserve (ESNERR)

Table

Family Common Name Scientific Name Counties Organizations involved in management of Central Coast Region Examples of where species is being controlled
Aizoaceae Hottentot fig, iceplant, sea fig Carpobrotus edulis, C. chilensis SCR, MON, SLO, SB CA State Parks, BLM, ESF/ESNERR, MPRPD Point Lobos SNR [1], Fort Ord Dunes State Park [2], Marina State Beach [3], Moss Landing State Beach [4], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7], Marina Dunes Preserve [8]
Aizoaceae Narrow leaved iceplant Conicosia pugioniformis SCR, MON, SLO, SB MPRPD Marina Dunes Preserve [8]
Aizoaceae New zealand spinach Tetragonia tetragonioides SCL, SCR, MON, SLO, SB MPRPD Marina Dunes Preserve [8]
Alliaceae White flowered onion Allium triquetrum SCL, SCR, MON, SLO, SB BLM Fort Ord National Monument [5]
Apiaceae Poison hemlock Conium maculatum SCL, SCR, MON, SBT, SLO, SB CA State Parks, Santa Lucia Conservancy [9], BLM, ESF/ESNERR, MPRPD, RCDMC Point Lobos SNR [1], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7], Carmel River [10]
Apiaceae Fennel Foeniculum vulgare SCL, SCR, MON, SBT, SLO, SB CA State Parks, BLM, ESF/ESNERR, MPRPD Point Lobos SNR [1], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7]
Apocynaceae Bigleaf periwinkle Vinca majora SCL, SCR, MON, SBT, SLO, SB CA State Parks, ESF/ESNERR, MPRPD Point Lobos SNR [1], Elkhorn Slough [6], Palo Corona Regional Park [7]
Araceae Calla lily Zantedeschia aethiopica SCL, SCR, MON, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [11]
Araliaceae English ivy Hedera helix SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Palo Corona Regional Park [7]
Asparagaceae African asparagus fern, bridal creeper Asparagus asparagoides SCL, SCR, MON, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Asteraceae Stinky snakeroot, Thoroughwort Ageratina adenophora * SCR, MON, SLO, SB MPRPD Palo Corona Regional Park [7]
Anthemis cotula stinking chamomile Ageratina adenophora SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Asteraceae Cape weed Arctotheca calendula * SCR, MON, SLO, SB
Asteraceae Italian thistle Carduus pycnocephalus SCL, SCR, MON, SBT, SLO, SB CA State Parks, Santa Lucia Conservancy [9], ESF/ESNERR, MPRPD, RCDMC Point Lobos SNR [1], Elkhorn Slough [6], Palo Corona Regional Park [7], Carmel River [10]
Asteraceae Wooly distaff thistle Carthamus lanatus (ST) SCL, SLO, SB
Asteraceae Diffuse knapweed Centaurea diffusa (ET) SCL, MON
Asteraceae Tocalote Centaurea melitensis SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Palo Corona Regional Park [7], Marina Dunes Preserve [8]
Asteraceae Yellow star thistle Centaurea solstitialis * SCL, SCR, MON, SBT, SLO, SB Santa Lucia Conservancy [9], BLM, RCDMC Fort Ord National Monument [5], Carmel River [10]
Asteraceae Spotted knapweed Centaurea stoebe (ET) SCL, MON, SB BLM, ESF/ESNERR Fort Ord National Monument [5]
Asteraceae Skeleton weed Chondrilla juncea (ET) SCL, MON, SLO, SB
Asteraceae Bull thistle Cirsium vulgare SCL, SCR, MON, SBT, SLO, SB Santa Lucia Conservancy [9], ESF/ESNERR, MPRPD Elkhorn Slough [6], Palo Corona Regional Park [7]
Asteraceae Cape ivy Delairea odorata * SCL, SCR, MON, SBT, SLO, SB CA State Parks, Santa Lucia Conservancy [12], ESF/ESNERR, MPRPD, RCDMC Point Lobos SNR [1], Elkhorn Slough [6], Palo Corona Regional Park [7], Carmel River [10]
Asteraceae Stinkwort Dittrichia graveolens SCL, SCR, MON, SBT, SLO, SB Santa Lucia Conservancy [9], BLM Fort Ord National Monument [5]
Asteraceae Licorice plant Helicrysum petiolare (ST) MON, SLO
Asteraceae Bristly ox-tongue Helminthotheca echioides SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Asteraceae Hairy cats ear Hypochaeris radicata SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Asteraceae Prickly lettuce Lactuca serriola SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Asteraceae Scotch cottonthistle Onopordum acanthium * SCR, MON, SBT, SB
Asteraceae Taurian thistle Onopordum tauricum * MON
Asteraceae Cutleaf burnweed, fireweed Senecio glomeratus SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Palo Corona Regional Park [7]
Asteraceae Common groundsel Senecio vulgaris SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Marina Dunes Preserve [8]
Asteraceae Milk thistle Silybum marianum SCL, SCR, MON, SBT, SLO, SB CA State Parks, Santa Lucia Conservancy [9], BLM, ESF/ESNERR, MPRPD Point Lobos SNR [1], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7]
Asteraceae Sow thistle Sonchus species (asper, oleraceus) SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Asteraceae Rouch cockleburr Xanthium strumarium SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Boranginaceae Pride of madeira Echium candicans SCL, SCR, MON, SBT, SLO, SB MPRPD Palo Corona Regional Park [7]
Boranginaceae Forget me not Myosotis latifolia SCL, SCR, MON, SLO ESF/ESNERR Elkhorn Slough [6]
Brassicaceae Black mustard Brassica nigra SCL, SCR, MON, SBT, SLO, SB CA State Parks, BLM, MPRPD Point Lobos SNR [1], Fort Ord National Monument [5], Palo Corona Regional Park [7], Marina Dunes Preserve [8]
Brassicaceae Field mustard Brassica rapa SCL, SCR, MON, SBT, SLO, SB RCDMC Carmel River [10]
Brassicaceae Sea rocket Cakile maritima SCL, SCR, MON, SLO, SB CA State Parks Moss Landing State Beach [4]
Brassicaceae Shepher's purse Capsella bursa-pastoris SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Brassicaceae Hoary cress Lepidium chalepense SCL, SCR, MON, SBT, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [6]
Brassicaceae Wild radish Raphanus sativus SCL, SCR, MON, SBT, SLO, SB MPRPD, RCDMC Palo Corona Regional Park [7], Marina Dunes Preserve [8], Carmel River [10]
Caryophyllaceae Chickweed Sellaria media SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Chenopodiaceae Australian saltbush Atriplex semibaccata SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [6]
Chenopodiaceae Lamb's quarters Chenopodium album SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Chenopodiaceae common red sage, Mexican fireweed Kochia scoparia (ET) MON, SLO, SB
Chenopodiaceae Russian thistle Salsola tragus SCL, SCR, MON, SBT, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [6]
Convolvulaceae Field bindweed Convolvulus arvensis SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Dipsacaeceae Fuller's teasel Dipsacus fullonum SCL, SCR, MON, SBT, SLO, SB BLM Fort Ord National Monument [5]
Fabaceae Silver wattle Acacia dealbata SCL, SCR, MON, SBT, SLO RCDMC, MPRPD Carmel River [10], Marina Dunes Preserve [8]
Fabaceae Black wattle Acacia decurrens SCR, MON, SLO, SB RCDMC Carmel River [10]
Fabaceae Stink bean, Albizia Albizia lophantha SCR, MON, SLO, SB MPRPD Palo Corona Regional Park [7]
Fabaceae French broom Genista monspessulana * SCL, SCR, MON, SBT, SLO, SB CA State Parks, Santa Lucia Conservancy [9], BLM, ESF/ESNERR, MPRPD, RCDMC Point Lobos SNR [1], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7], Carmel River [10]
Fabaceae Everlasting pea, sweet pea Lathyrus latifolius * SCL, SCR, MON, SLO, SB BLM [5]
Fabaceae White horehound Marrubium vulgare SCL, SCR, MON, SBT, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [6]
Fabaceae Rattlebox, scarlet wisteria Sesbania punicea (ST)
Geraniaceae Redstem stork's bill Eodium cicutarium SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Hypericaceae Klamath weed Hypericum perforatum SCL, SCR, MON, SBT, SLO BLM Fort Ord National Monument [5]
Iridaceae Paleyellow iris Iris pseudacorus SCL, SCR, MON, SBT, SLO, SB MPRPD Palo Corona Regional Park [7]
Iridaceae Bulbil bugle lily Watsonia meriana (ET) SCR, SLO
Lythraceae Purple loosestrife Lythrum salicaria (ET, ED) SCL, SCR, MON
Malvaceae Mallow Malva species (parviflora, neglecta) SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, RCDMC Elkhorn Slough [6], Carmel River [10]
Myrtaceae Blue gum Eucalyptus globulus SCL, SCR, MON, SBT, SLO, SB BLM, MPRPD, RCDMC Fort Ord National Monument [5], Elkhorn Slough [6], Marina Dunes Preserve [8], Palo Corona Regional Park [7], Carmel River [10]
Myrtaceae Australian tea tree Leptospermum laevigatum SCL, MON, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5]
Oxalidaceae Creeping wood sorrel Oxalis corniculata SCL, SCR, MON, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Oxalidaceae Bermuda buttercup Oxalis pes-caprae SCL, SCR, MON, SBT, SLO, SB BLM, ESF/ESNERR, MPRPD Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7]
Plantaginaceae Purple foxglove Digitalis purpurea (ST) SCL, SCR, MON, SLO, SB
Plantaginaceae Dalmatian toadflax Linaria dalmatica ssp. dalmatica (ST) MON, SLO, SB
Plantaginaceae Plantain Plantago species (major, lanceolata) SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Marina Dunes Preserve [8]
Poaceae Barbed goatgrass Aegilops triuncialis (ET) SCL, SCR, SLO
Poaceae European dune grass Ammophila arenaria SCR, MON, SLO, SB CA State Parks, MPRPD Moss Landing State Beach [4], Marina Dunes Preserve [8]
Poaceae Giant reed ''Arundo donax'' * SCL, SCR, SBT, MON, SLO, SB CA State Parks, BLM, RCDMC Fort Ord National Monument [5], Salinas River [13]
Poaceae Wild oat Avena species (barbata, fatua) SCL, SCR, SBT, MON, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Marina Dunes Preserve [8]
Poaceae Slender false brome Brachypodium sylvaticum (ST) SCL, SCR
Poaceae Ripgut brome Bromus diandrus SCL, SCR, SBT, MON, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Marina Dunes Preserve [8]
Poaceae Purple pampas grass, jubata grass Cortaderia jubata * SCL, SCR, SBT, MON, SLO, SB CA State Parks, Santa Lucia Conservancy [12], BLM, ESF/ESNERR, MPRPD, RCDMC Point Lobos SNR [1], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7], Carmel River [10]
Poaceae Pampas grass Cortaderia selloana * SCL, SCR, MON, SLO, SB Santa Lucia Conservancy [12], ESF/ESNERR, RCDMC Elkhorn Slough [6], Carmel River [10]
Poaceae Bermuda grass Cynodon dactylon SCL, SCR, MON, SBT, SLO, SB Santa Lucia Conservancy [12], ESF/ESNERR Elkhorn Slough [6]
Poaceae Perennial veldtgrass Ehrharta calycina * SCR, MON, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [6]
Poaceae Panic veldtgrass Ehrharta erecta SCL, SCR, MON, SLO, SB CA State Parks, MPRPD, ESF/ESNERR Point Lobos SNR [1], Palo Corona Regional Park [7], Elkhorn Slough [11]
Poaceae Tall fescue Festuca arundinacea SCL, SCR, MON, SBT, SLO, SB BLM Fort Ord National Monument [5]
Poaceae Italian rye grass Festuca perennis SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Poaceae Velvet grass Holcus lanatus SCL, SCR, MON, SLO, SB BLM, ESF/ESNERR Fort Ord National Monument [5], Elkhorn Slough [6]
Poaceae Foxtail barley Hordeum murinum SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Marina Dunes Preserve [8]
Poaceae Mexican feathergrass Nassella tenuissima SCL, SCR, MON, SBT, SLO, SB Santa Lucia Conservancy [12], BLM Fort Ord National Monument [5]
Poaceae Kikuyu grass Pennisetum clandestinum SCR, MON, SLO, SB CA State Parks, BLM, MPRPD Point Lobos SNR [1], Fort Ord National Monument [5], Palo Corona Regional Park [7], Marina Dunes Preserve [8]
Poaceae Fountaingrass Pennisetum setaceum SCL, SCR, MON, SLO, SB Santa Lucia Conservancy [12]
Poaceae Harding grass Phalaris aquatica SCL, SCR, MON, SBT, SLO, SB CA State Parks, BLM, ESF/ESNERR, MPRPD Point Lobos SNR [1], Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7]
Poaceae Annual blue grass Poa annua SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Poaceae Rabbitfoot grass Polypogon monspeliensis SCL, SCR, MON, SBT, SLO, SB MPRPD Marina Dunes Preserve [8]
Poaceae Smooth cordgrass (ST) Spartina alterniflora
Poaceae Puna needle grass Stipa brachychaeta * MON, SLO, SB
Polygonaceae Devil's thorn Emex spinosa (ST) SB, SLO
Polygonaceae Japanese knotweed Fallopia japonica (ET, ED) SCR, SLO
Polygonaceae Common sheep sorrel Rumex acetosella SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR, MPRPD Elkhorn Slough [6], Marina Dunes Preserve [8]
Polygonaceae Curly dock Rumex crispus SCL, SCR, MON, SBT, SLO, SB ESF/ESNERR Elkhorn Slough [6]
Pontederiaceae Common water hyacinth Eichhornia crassipes (ET) SCR, MON, SLO, SB
Rosaceae Wooly cotoneaster Cotoneaster pannosus SCL, SCR, MON, SBT, SLO, SB MPRPD Palo Corona Regional Park [7]
Rosaceae Himalayan blackberry Rubus armeniacus SCL, SCR, MON, SBT, SLO, SB BLM, ESF/ESNERR, MPRPD Fort Ord National Monument [5], Elkhorn Slough [6], Palo Corona Regional Park [7]
Scrophulariaceae Woolly mullein Verbascum thapsus SCL, SCR, MON, SBT, SLO, SB MPRPD Palo Corona Regional Park [7]
Scrophulariaceae Wand mullein Verbascum vigatum SCR, MON, SLO, SB BLM Fort Ord National Monument [5]
Solanaceae Tree tabacco Nicotiana glauca SCL, SCR, MON, SBT, SLO, SB RCDMC Salinas River [13]
Tamaricaceae Smallflower tamarisk Tamarix parviflora SCL, SCR, MON, SBT, SLO, SB RCDMC Salinas River [13]

References

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 Point Lobos State Natural Reserve Existing Conditions and Resources Inventory Report https://www.parks.ca.gov/pages/21299/files/PLSNR_Existing%20Conditions_rev12-17.pdf
  2. Fort Ord Dunes State Park General Plan and Environmental Impact Report https://www.parks.ca.gov/pages/21299/files/fodsp_gp_eir_vol_1.pdf
  3. Marina State Beach General Plan http://www.parks.ca.gov/pages/21299/files/ar_479_867.pdf
  4. 4.0 4.1 4.2 Moss Landing State Beach General Plan http://www.parks.ca.gov/pages/21299/files/ar_454_790.pdf
  5. 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 5.12 5.13 5.14 5.15 5.16 5.17 5.18 5.19 5.20 5.21 5.22 5.23 5.24 5.25 5.26 5.27 5.28 5.29 5.30 Controlling Invasive Species on Fort Ord National Monument: Finding Weeds While Avoiding Bombs https://www.cal-ipc.org/wp-content/uploads/2017/12/5_Hubbard.pdf
  6. 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.20 6.21 6.22 6.23 6.24 6.25 6.26 6.27 6.28 6.29 6.30 6.31 6.32 6.33 6.34 6.35 6.36 6.37 6.38 6.39 6.40 6.41 6.42 6.43 6.44 6.45 6.46 6.47 6.48 Weed Control by Species: Elkhorn Slough National Estuarine Research Reserve http://elkhornslough.org/habitat-restoration/weeds.pdf
  7. 7.00 7.01 7.02 7.03 7.04 7.05 7.06 7.07 7.08 7.09 7.10 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 7.20 7.21 7.22 7.23 7.24 7.25 7.26 Invasive Weed Management Plan for Palo Corona Regional Park https://mprpd.specialdistrict.org/files/e951aaa49/PCRPWMP_052314.pdf
  8. 8.00 8.01 8.02 8.03 8.04 8.05 8.06 8.07 8.08 8.09 8.10 8.11 8.12 8.13 8.14 8.15 8.16 Dune Habitat Restoration Plan, Marina Dunes Preserve https://mprpd.specialdistrict.org/files/220300ef0/Restoration%26AccessPlan.pdf
  9. 9.0 9.1 9.2 9.3 9.4 9.5 9.6 Santa Lucia Conservancy Invasive Weeds https://slconservancy.org/community/habitat-restoration/invasive-weeds/
  10. 10.00 10.01 10.02 10.03 10.04 10.05 10.06 10.07 10.08 10.09 10.10 10.11 10.12 Carmel River Watershed Stewardship Manual https://www.rcdmonterey.org/images/docs/publications/carmel-watershed-conservation-manual.pdf
  11. 11.0 11.1 Elkhorn Slough National Estuarine Research Reserve Final Management Plan 2007-2011 http://elkhornslough.org/downloads/ESNERR_Final_Management_Plan.doc
  12. 12.0 12.1 12.2 12.3 12.4 12.5 Invasive Plant Management on The Santa Lucia Preserve: A Landowner’s Guide https://slconservancy.org/wp-content/uploads/2019/01/PreserveOwnerWeedMngGuidelines-2019.pdf
  13. 13.0 13.1 13.2 Salinas River Invasive Plant Control and Restoration Program https://www.rcdmonterey.org/salinas-river-arundo-and-tamarisk-control

Links

State-wide resources

County/region-wide resources

Guidance documents for management of parks/open space in the Monterey Bay area (north to south)

Disclaimer

This page may contain student work completed as part of assigned coursework. It may not be accurate. It does not necessarily reflect the opinion or policy of CSUMB, its staff, or students.