Noxious and Invasive Plants of Calgary, AB

This guide aims to educate users in recognizing some of Alberta's invasive plants and to help document their distribution.

The following list includes noxious and invasive plants outlined by the Province of Alberta and City of Calgary as prohibited noxious weeds and plants. ...more ↓

All 74

Creeping Bellflower ¹
Campanula rapunculoides

common teasel ²
Dipsacus fullonum

Orange-peel Clematis ³
Clematis tangutica

Caraway ⁴
Carum carvi

black henbane ⁵
Hyoscyamus niger

viper's-bugloss ⁶
Echium vulgare

common St. John's-wort ⁷
Hypericum perforatum

baby's-breath ⁸
Gypsophila paniculata

Himalayan balsam ⁹
Impatiens glandulifera

dalmatian toadflax ¹⁰
Linaria dalmatica dalmatica

common toadflax ¹¹
Linaria vulgaris

tall buttercup
Ranunculus acris acris

sulphur cinquefoil ¹²
Potentilla recta

common buckthorn ¹³
Rhamnus cathartica

purple loosestrife ¹⁴
Lythrum salicaria

bladder campion ¹⁵
Silene vulgaris

five-stamen tamarisk ¹⁶
Tamarix chinensis

saltcedar ¹⁷
Tamarix ramosissima

tansy ¹⁸
Tanacetum vulgare

small-flowered tamarisk ¹⁹
Tamarix parviflora

creeping thistle ²⁰
Cirsium arvense

broadleaved pepperweed ²¹
Lepidium latifolium

great mullein ⁶
Verbascum thapsus

dame's rocket ²²
Hesperis matronalis

Field Scabious ²³
Knautia arvensis

hairy white-top ²⁴
Lepidium appelianum

field bindweed ²⁵
Convolvulus arvensis

heart-podded hoary cress ²⁶
Lepidium draba

scentless mayweed ²⁷
Tripleurospermum inodorum

greater burdock ²⁸
Arctium lappa

evening lychnis ²⁹
Silene latifolia alba

Woolly Burdock ³⁰
Arctium tomentosum

Lens-podded Hoary Cress ³¹
Lepidium draba chalapense

lesser burdock ³²
Arctium minus

oxeye daisy ³³
Leucanthemum vulgare

Perennial Sow Thistle ³⁴
Sonchus arvensis

cheatgrass ³⁵
Bromus tectorum

Thunberg's Brome
Bromus japonicus

hound's-tongue ¹⁴
Cynoglossum officinale

black knapweed ³⁶
Centaurea nigra

meadow buttercup ³⁷
Ranunculus acris

Giant Knapweed ¹⁸
Centaurea macrocephala

European barberry ³⁸
Berberis vulgaris

diffuse knapweed ³⁹
Centaurea diffusa

Brown Knapweed ⁴⁰
Centaurea jacea

bearded creeper ⁴¹
Crupina vulgaris

woad ¹
Isatis tinctoria

garlic mustard ⁴²
Alliaria petiolata

Giant Hogweed ⁴³
Heracleum mantegazzianum

Centaurea ×psammogena ⁴⁴

meadow hawkweed ⁴⁵
Pilosella caespitosa

Bohemian Knotweed ⁴⁶
Reynoutria × bohemica

Monckton's Knapweed ⁴⁷
Centaurea × moncktonii

Marsh Thistle ⁴⁸
Cirsium palustre

mouse-eared hawkweed ⁴⁹
Pilosella officinarum

musk thistle ⁵⁰
Carduus nutans

orange hawkweed ⁵¹
Pilosella aurantiaca

puncture vine ⁵²
Tribulus terrestris

Broad-winged Thistle ⁵³
Carduus acanthoides

Red Bartsia ⁵⁴
Odontites vernus

Rush Skeletonweed ⁵⁵
Chondrilla juncea

Centaurea alba strepens

Russian knapweed ⁵⁶
Leuzea repens

jointed goat grass ⁵⁷
Aegilops cylindrica

Tyrol knapweed ⁵⁸
Centaurea nigrescens

medusa head ¹
Taeniatherum caput-medusae

yellow nutsedge ⁵⁹
Cyperus esculentus

hoary alyssum ⁶⁰
Berteroa incana

Saltlover ⁶¹
Halogeton glomeratus

Eurasian water-milfoil ⁶²
Myriophyllum spicatum

ragwort ⁶³
Jacobaea vulgaris

Yellow Starthistle ⁶⁴
Centaurea solstitialis

Flowering-rush ⁶⁵
Butomus umbellatus

Yellow Iris ⁶⁶
Iris pseudacorus

Edited by Matt Wallace, some rights reserved (CC BY-SA)

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Noxious and Invasive Plants of Calgary, AB

Creeping Bellflower 1 Campanula rapunculoides

common teasel 2 Dipsacus fullonum

Orange-peel Clematis 3 Clematis tangutica

Caraway 4 Carum carvi

black henbane 5 Hyoscyamus niger

viper's-bugloss 6 Echium vulgare

common St. John's-wort 7 Hypericum perforatum

baby's-breath 8 Gypsophila paniculata

Himalayan balsam 9 Impatiens glandulifera

dalmatian toadflax 10 Linaria dalmatica dalmatica

common toadflax 11 Linaria vulgaris

tall buttercup Ranunculus acris acris

sulphur cinquefoil 12 Potentilla recta

common buckthorn 13 Rhamnus cathartica

purple loosestrife 14 Lythrum salicaria

bladder campion 15 Silene vulgaris

five-stamen tamarisk 16 Tamarix chinensis

saltcedar 17 Tamarix ramosissima

tansy 18 Tanacetum vulgare

small-flowered tamarisk 19 Tamarix parviflora

creeping thistle 20 Cirsium arvense

broadleaved pepperweed 21 Lepidium latifolium

great mullein 6 Verbascum thapsus

dame's rocket 22 Hesperis matronalis

Field Scabious 23 Knautia arvensis

hairy white-top 24 Lepidium appelianum

field bindweed 25 Convolvulus arvensis

heart-podded hoary cress 26 Lepidium draba

scentless mayweed 27 Tripleurospermum inodorum

greater burdock 28 Arctium lappa

evening lychnis 29 Silene latifolia alba

Woolly Burdock 30 Arctium tomentosum

Lens-podded Hoary Cress 31 Lepidium draba chalapense

lesser burdock 32 Arctium minus

oxeye daisy 33 Leucanthemum vulgare

Perennial Sow Thistle 34 Sonchus arvensis

cheatgrass 35 Bromus tectorum

Thunberg's Brome Bromus japonicus

hound's-tongue 14 Cynoglossum officinale

black knapweed 36 Centaurea nigra

meadow buttercup 37 Ranunculus acris

Giant Knapweed 18 Centaurea macrocephala

European barberry 38 Berberis vulgaris

diffuse knapweed 39 Centaurea diffusa

Brown Knapweed 40 Centaurea jacea

bearded creeper 41 Crupina vulgaris

woad 1 Isatis tinctoria

garlic mustard 42 Alliaria petiolata

Giant Hogweed 43 Heracleum mantegazzianum

Centaurea ×psammogena 44

meadow hawkweed 45 Pilosella caespitosa

Bohemian Knotweed 46 Reynoutria × bohemica

Monckton's Knapweed 47 Centaurea × moncktonii

Marsh Thistle 48 Cirsium palustre

mouse-eared hawkweed 49 Pilosella officinarum

musk thistle 50 Carduus nutans

orange hawkweed 51 Pilosella aurantiaca

puncture vine 52 Tribulus terrestris

Broad-winged Thistle 53 Carduus acanthoides

Red Bartsia 54 Odontites vernus

Rush Skeletonweed 55 Chondrilla juncea