Plants

Government has evaluated more than 300 terrestrial and aquatic plant species to determine likelihood of occurrence, establishment and spread as well as to determine which pose the greatest threat. 48 plant species are candidates for early detection and rapid response activities and 118 other species are recommended for other levels of management.

There are 5 priority categories. A plant's priority category determines the province's response.

  1. Prevent
  2. Early detection and rapid response (EDRR)
  3. Provincial Containment
  4. Regional containment/control
  5. Management

The plants on this page are organized into these categories. 

View the information below in a table format

Prevent

These species are determined to be high risk to B.C. and are not yet established. Management objective is prevent the introduction and establishment.

Camelthorn

Camelthorn
Alhagi maurorum


Eggleaf spurge

Eggleaf spurge (PDF, 2MB)
Euphorbia oblongata


Hydrilla

Hydrilla (PDF, 585KB)
Hydrilla verticillata


Johnsongrass

Johnsongrass
Sorghum halepense​


Meadow Clary

Meadow Clary (PDF, 526KB) 
Salvia pratensis​


Purple nutsedge

Purple nutsedge (PDF, 127KB)  
Cyperus rotundus


Silverleaf nightshade

Silverleaf nightshade
Solanum elaeagnifolium


Spring milletgrass

Spring milletgrass
Milium vernale


Syrian bean-caper

Syrian bean-caper
Zygophyllum fabago​

Clary sage

Clary sage
Salvia sclarea


Goatsrue

Goatsrue
Galega officinalis


Iberian starthistle

Iberian starthistle
Centaurea iberica​


Jointed goatgrass

Jointed goatgrass (PDF, 356KB) 
Aegilops cylindrica


Mediterranean sage

Mediterranean sage
Salvia aethiopis​


Purple starthistle

Purple starthistle
Centaurea calcitrapa​


Slender/Meadow foxtail

Slender/Meadow foxtail
Alopecurus myosuroides​


Spurge Flax

Spurge Flax
Thymelaea passerina​


Texas Blueweed

Texas Blueweed
Helianthus ciliaris​

Common crupina

Common crupina
Crupina vulgaris


Halogeton/Saltlover

Halogeton/Saltlover
Halogeton glomeratus​


Italian thistle

Italian thistle
Carduus pycnocephalus


Kudzu

Kudzu (PDF, 810KB)  
Pueraria montana var. lobata


Medusahead

Medusahead (PDF, 766KB)
Taeniatherum caput-medusae​


Red bartsia

Red bartsia
Odontites serotina


Slenderflower thistle/winged thistle

Slenderflower thistle/winged thistle
Carduus tenuiflorus​


Squarrose knapweed

Squarrose knapweed (PDF, 113KB) 
Centaurea virgata ssp. squarrosa


Water soldier

Water soldier
Stratiotes aloides​

Early detection and rapid response (EDRR)

Learn more about the provincial EDRR.

These species are high risk to B.C. and are new to the Province. Management objective is eradication.

African rue

African rue
Peganum harmala​



Dyer's woad
Isatis tinctoria​



Giant reed
Arundo​ donax 



Hawkweed, mouse ear (PDF, 530KB) 
Hieracium pilosella​


Shiny geranium (PDF, 1.9MB)
Geranium lucidum


Water lettuce
Pistia stratiotes

Black henbane

Black henbane (PDF, 359KB) 
Hyoscyamus niger



European common reed  (PDF, 558KB)  
Phragmites australis​



Invasive cordgrasses
Spartina spp.​



North Africa grass (PDF, 525KB) 
Ventenata dubia​


Slender False brome (PDF, 1MB) 
Brachypodium sylvaticum subsp. sylvaticum​


Yellow floating heart
Nymphoides peltata​

Brazilian Elodea/Waterweed (PDF, 506KB) 
Egeria densa



Flowering rush (PDF, 508KB)  
Butomus umbellatus



Maltese star thistle
Centaurea melitensis​



Perennial pepperweed (PDF, 592KB) 
Lepidium latifolium


Water hyacinth
Eichhornia crassipes


Yellow starthistle (PDF, 134KB) 
Centaurea solstitialis

Provincial containment

Species is high risk with limited extent in B.C. but significant potential to spread. Management objective is to prevent further expansion into new areas with the ultimate goal of reducing the overall extent.

Garlic mustard (PDF, 346KB) 
Alliaria petiolata​


Rush skeletonweed (PDF, 151KB)  
Chondrilla juncea

Giant hogweed
Heracleum mantegazzianum


Wild chervil (PDF, 132KB)
Anthriscus sylvestris

Poison hemlock (PDF, 134KB) 
Conium maculatum


Wild Parsnip
Pastinaca sativa

Regional containment/control

Species is high risk and well established, or medium risk with high potential for spread. Management objective is to prevent further expansion into new areas within the region through establishment of containment lines and identification of occurrences outside the line to control. 

Blueweed (PDF, 135KB) 
Echium vulgare


Field scabious (PDF, 137KB)   
Knautia arvensis


Hoary alyssum (PDF, 133KB) 
Berteroa incana


Leafy spurge (PDF, 154KB)  
Euphorbia esula


Policeman's helmet/Himalayan balsam
Impatiens glandulifera​


Spotted knapweed (PDF, 169KB) 
Centaurea stoebe


Yellow archangel
Lamium galeobdolon

Common bugloss  (PDF, 125KB) 
Anchusa officinalis​


Himalayan blackberry
Rubus armeniacus​


Hoary cress (PDF, 160KB)
Cardaria draba


Marsh plume thistle / marsh thistle (PDF, 157KB) 
Cirsium palustre


Puncturevine (PDF, 124KB) 
Tribulus terrestris​


Teasel
Dipsacus fullonum​


Yellow flag iris
Iris pseudacorus

Common tansy (PDF, 150KB) 
Tanacetum vulgare


Himalayan knotweed
Persicaria wallichii​


Knotweeds (Japanese, Giant and Bohemian)
Fallopia/Reynoutria and Polygonum  spp.


Orange hawkweed (PDF, 166KB)    Hieracium aurantiacum​


Scotch broom
Cytisus scoparius​


Whiplash hawkweed
Hieracium flagellare​


 

Management

Species is more widespread but may be of concern in specific situations with certain high values - for example, conservation lands, specific agriculture crops. Management objective is to reduce the invasive species impacts locally or regionally, where resources are available.

Bur chervil
Anthriscus caucalis​


Eurasian water milfoil (PDF, 288 KB)
Myriophyllum spicatum​


Longspine Sandbur
Cenchrus longispinus


Scentless chamomile (PDF, 139KB)  Tripleurospermum inodorum​


Sulphur cinquefoil  (PDF, 133KB)
Potentilla recta

Carpet burweed
Soliva sessilis


Gorse (PDF, 144KB)  
Ulex europaeus


Mountain bluet
Centaurea montana​


Scotch thistle (PDF, 152KB)  
Onopordum acanthium


Sweet fennel
Foeniculum vulgare​

Cypress spurge
Euphorbia cyparissias​


Invasive yellow hawkweeds
Hieracium spp.


Purple loosestrife (PDF, 140KB) 
Lythrum salicaria


Spurge laurel/Daphne 
Daphne laureola


Tansy ragwort (PDF, 140KB)
Jacobaea vulgaris

Invasive plants with biocontrol

The B.C. government uses biocontrol agents to reduce invasive plant populations to ecologically and economically acceptable levels, and to prevent invasive plants spreading into new areas.