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What about all the rest of the weeds?

In 2010, the Alberta government revised the Weed Control Regulation to expand the prohibited noxious (not allowed to exist in Alberta, period) and noxious (must be controlled wherever found) weed lists.  Luckily for us in Alberta, most of these plants haven't made it here yet.  Most new weeds are introduced as ornamentals in gardens so always know what you're buying and planting.

Below is the master list of all regulated weeds in Alberta.  To find out more information on a particular weed, just click on its name!

NOTE: If you discover a plant you believe is noxious or prohibited noxious and require assistance identifying it, please call Parks Operations at (780) 830-5018 and a staff member will assist you.

Prohibited Noxious

Autumn Olive
 Himalayan Balsam
 Common Barberry
 Autumn olive
(Elaeagnus umbellata Thunb.)

Himalayan balsam
(Impatiens glandulifera Royle)

 Common barberry
(Berberis vulgaris L.)
Red Bartsia 

 Common Buckthorn
Sulphur Cinquefoil 
 Red bartsia
(Odontites vernus Dumort)

 Common buckthorn
(Rhamnus cathartica L.)

 Sulphur cinquefoil
(Potentilla recta L.)
 Common Crupina
Dyer's Woad 
Eurasian Water Milfoil 
 Common crupina
(Crupina vulgaris Pers. ex Cass.)

 Dyer's woad
(Isatis tinctoria L.)

 Eurasian water milfoil
(Myriophyllum spicatum L.)
 Flowering Rush
Garlic Mustard 
Jointed Goatgrass 
 Flowering rush
(Butomus umbellatus L.)

 Garlic mustard
(Alliaria petiolata Cavara & Grande)

 Jointed goatgrass
(Aegilops cylindrica Host)
 Meadow Hawkweed
 Mouse-Ear Hawkweed
 Orange Hawkweed
 Meadow hawkweed
(Hieracium caespitosum Dumort.)

 Mouse-ear hawkweed
(Hieracium pilosella L.)

 Orange hawkweed
(Hieracium aurantiacum L.)
 Hoary Alyssum
Giant Hogweed 
Pale Yellow Iris 
 Hoary alyssum
(Berteroa incana DC.)

 Giant hogweed
(Heracleum mantegazzianum
Sommier & Levier)

 Pale yellow iris
(Iris pseudacorus L.)
 Bighead Knapweed

 Black Knapweed
 Brown Knapweed
 Bighead knapweed
(Centaurea macrocephala
Puschk. ex Willd.)

 Black knapweed
(Centaurea nigra L.)

 Brown knapweed
(Centaurea jacea L.)
Diffuse Knapweed 
 Hybrid Knapweed

 Meadow Knapweed
 Diffuse knapweed
(Centaurea diffusa Lam.)

 Hybrid knapweed
(Centaurea x psammogena

 Meadow knapweed
(Centaurea x moncktonii
C.E. Britton)
Russian Knapweed

Spotted Knapweed

Squarrose Knapweed
Russian knapweed
(Rhaponticum repens Hidalgo)

Spotted knapweed
(Centaurea stoebe L.
ssp. micranthos Hayek)

Squarrose knapweed
(Centaurea virgata Lam.
ssp. squarrosa Gugler
Tyrol Knapweed

Giant Knotweed

Hybrid Japanese Knotweed
Tyrol knapweed
(Centaurea nigrescens Willd.)

Giant knotweed
(Fallopia sachalinensis
Ronse Decr.)

Hybrid Japanese knotweed
(Fallopia x bohemica
J.P. Bailey)
Japanese Knotweed

Purple Loosestrife

Japanese knotweed
(Fallopia japonica Ronse Decr.)

Purple loosestrife
(Lythrum salicaria L.)

(Taeniatherum caput-medusae Nevski)
Yellow Nutsedge


Tansy Ragwort
Yellow nutsedge
(Cyperus esculentus L.)

(Tribulus terrestris L.)

Tansy ragwort
(Jacobaea vulgaris Gaertn.)
Rush Skeletonweed


Rush skeletonweed
(Chondrilla juncea L.)

(Tamarix ramosissima

(Halogeton glomeratus
C.A. Mey.)
St. John's Wort

Yellow Starthistle

Chinese Tamarisk
St. John's-wort
(Hypericum perforatum L.)

Yellow starthistle
(Centaurea solstitialis L.)

Chinese tamarisk
(Tamarix chinensis Lour.)
 Smallflower Tamarisk
 Marsh Thistle
Nodding Thistle 
 Smallflower tamarisk
(Tamarix parviflora DC.)

 Marsh thistle
(Cirsium palustre Scop.)

 Nodding thistle
(Carduus nutans L.)
 Plumeless Thistle
 Plumeless thistle
(Carduus acanthoides L.)



 Baby's Breath    Creeping Bellflower    Field Bindweed
Common baby's-breath
(Gypsophila paniculata L.)
  Creeping bellflower
(Campanula rapunculoides L.)
  Field bindweed
(Convolvulus arvensis L.)
  Downy Brome
  Japanese Brome
(Echium vulgare L.)
  Downy brome
(Bromus tectorum L.)
  Japanese brome
(Bromus japonicus Thunb.)
Great Burdock
  Lesser Burdock
  Woolly Burdock
Great burdock
(Arctium lappa L.)
  Lesser burdock
(Arctium minus Bernh.)
  Woolly burdock
(Arctium tomentosum Mill.)
Tall Buttercup
  Scentless Chamomile
  Yellow Clematis
Tall buttercup
(Ranunculus acris L.)
  Scentless chamomile
(Tripleurospermum inodorum Sch. Bip.)
  Yellow clematis
(Clematis tangutica Korsh.)
White Cockle
  Oxeye Daisy
  Dame's Rocket
White cockle
(Silene latifolia Greuter & Burdet)
  Oxeye daisy
(Leucanthemum vulgare Lam.)
  Dame's rocket
(Hesperis matronalis L.)
Black Henbane     Hoary Cress   Hound's Tongue 
Black henbane
(Hyoscyamus niger L.)
  Hoary cress
(Lepidium spp. L.)
(Cynoglossum officinale L.)
Common Mullein
  Broad-leaved Peppergrass
  Field Scabious
Common mullein
(Verbascum thapsus L.)
  Broad-leaved pepper-grass
(Lepidium latifolium L.)
  Field scabious
(Knautia arvensis Coult.)
Perennial Sow Thistle
  Leafy Spurge
Perennial sow thistle
(Sonchus arvensis L.)
  Leafy spurge
(Euphorbia esula L.)
  Common tansy
(Tanacetum vulgare L.)
 Canada Thistle    Dalmatian Toadflax   Yellow Toadflax 
Canada thistle
(Cirsium arvense Scop.)
  Dalmatian toadflax
(Linaria dalmatica Mill.)
  Yellow toadflax
(Linaria vulgaris Mill.)

Last updated: 1/7/2015 12:14:23 PM