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Ontario Weeds

Author: Mike Cowbrough - Weed Management Specialist (Field Crops)/OMAFRA; Leslie Huffman - Weed Management Specialist (Hort Crops)/OMAFRA
Creation Date: 01 June 2000
Last Reviewed: 23 January 2007
To browse by weed name, see the Ontario Weed Gallery Listing
To browse by family, see the Ontario Weed Gallery Families

Browse the Ontario Weeds Gallery: | 1 | 2 | 3 | 4 |
Click on the thumbnail or the weed name to view the larger picture.

Spurge Family (Euphorbiaceae)
Three-seeded mercury - Link to Ontario Weeds: Three-seeded Mercury
Three-seeded mercury
Hairy-stemmed spurge - Link to Ontario Weeds: Hairy-stemmed Spurge
Hairy-stemmed spurge 		Spotted Spurge - Link to Ontario Weeds: Spotted Spurge
Spotted Spurge 		Dentate spurge - Link to Ontario Weeds: Dentate Spurge
Dentate spurge 		Petty spurge - Link to Ontario Weeds: Petty Spurge
Petty spurge
Nodding spurge - Link to larger picture of Nodding Spurge
Nodding spurge
Sun spurge - Link to Ontario Weeds: Sun Spurge
Sun spurge 		Cypress spurge - Link to Ontario Weeds: Cypress Spurge
Cypress spurge		 Leafy spurge - Link to Ontario Weeds: Leafy Spurge
Leafy spurge		 Thyme-leaved spurge - Link to Ontario Weeds: Thyme-leaved Spurge Thyme-leaved spurge
Cashew Family (Anacardiaceae)
Poison ivy - Link to Ontario Weeds: Poison Ivy
Poison ivy 		Virginia creeper - Link to Ontario Weeds: Virginia Creeper
Virginia creeper 		Poison sumac - Link to Ontario Weeds: Poison Sumac
Poison sumac 		Staghorn sumac - Link to Ontario Weeds: Staghorn Sumac
Staghorn sumac
Buckthorn Family (Rhamnaceae)
European buckthorn - Link to Ontario Weeds: European Buckthorn
European buckthorn 		Chokecherry - Link to Ontario Weeds: Chokeberry
Chokecherry
Mallow Family (Malvaceae)
Velvetleaf - Link to Ontario Weeds: Velvet Leaf
Velvetleaf 		Common mallow - Link to Ontario Weeds: Common Mallow
Common mallow

Musk mallow - Link to Ontario Weeds: Musk Mallow
Musk mallow

Flower-of-an-hour - Link to Ontario Weeds: Flower-of-an-hour
Flower-of-an-hour

St. John's Wort Family (Hypericaeae)
St. John's wort - Link to Ontario Weeds: St. John's Wort
St. John's wort
Violet Family (Vialaceae)
Field violet - Link to Ontario Weeds: Field Violet
Field violet

Geranium Family (Geraniaceae)
Crane's Bill - Link to larger picture of Crane's Bill
Crane's Bill
Evening-Primrose Family (Onagraceae)
Yellow evening primrose - Link to Ontario Weeds: Yellow Evening Primrose
Yellow evening primrose
Loosetrife Family (Lythraceae)
Fringed loosestrife - Link to Ontario Weeds: Fringed Loosestrife
Fringed loosestrife 		Purple loosestrife - Link to Ontario Weeds: Purple Loosestrife
Purple loosestrife
Carrot or Parsely Family (Umbelliferae)
Wild carrot - Link to Ontario Weeds: Wild Carrot
Wild carrot 		Goutweed - Link to Ontario Weeds: Goutweed
Goutweed 		Poison hemlock - Link to Ontario Weeds: Poison Hemlock
Poison hemlock 		Water parsnip - Link to Ontario Weeds: Water Parsnip
Water parsnip
Angelica - Link to Ontario Weeds: Angelica
Angelica 		Spotted water hemlock - Link to Ontario Weeds: Spotted Water Hemlock
Spotted water hemlock 		Giant hogweed - Link to Ontario Weeds: Giant Hogweed
Giant hogweed 		Wild parsnip - Link to Ontario Weeds: Wild Parsnip
Wild parsnip
Dogbane Family (Apocynaceae)
Spreading dogbane - Link to Ontario Weeds: Spreading Dogbane
Spreading dogbane 		Hemp dogbane - Link to larger picture of Hemp Dogbane
Hemp dogbane		 Clasping-leaved dogbane - Link to Ontario Weeds: Clasping-leaved Dogbane
Clasping-leaved dogbane		 Tall water hemp - Link to Ontario Weeds: Tall Water Hemp
Tall water hemp
Milkweed Family (Asclepiadaceae)
Common milkweed - Link to Ontario Weeds: Common Milkweed
Common milkweed		 Swamp milkweed - Link to Ontario Weeds: Swamp Milkweed
Swamp milkweed		 Whorled milkweed - Link to Ontario Weeds: Whorled Milkweed
Whorled milkweed		 Dog-strangling vine - Link to Ontario Weeds: Dog-strangling Vine
Dog-strangling vine
Morning-Glory Family (Convolvulaceae)
Field bindweed - Link to Ontario Weeds: Field Bindweed
Field bindweed 		Hedge Bindweed - Link to Ontario Weeds: Hedge Bindweed
Hedge bindweed 		Wild grape - Link to larger picture of Wild Grape
Wild grape 		Dodder - Link to Ontario Weeds: Dodder
Dodder 		Morning glory - Link to larger picture of Morning Glory
Morning glory
Primrose Family (Primulaceae)
Scarlet Pimpernel - Link to larger picture of Scarlet Pimpernel
Scarlet pimpernel
Teasel Family (Dipsacaceae)
Teasel - Link to Ontario Weeds: Teasel
Teasel
Borage Family (Boraginaceae)
Blueweed - Link to Ontario Weeds: Blueweed
Blueweed		 Common comfrey - Link to larger picture of Common Comfrey
Common comfrey
Mint Family (Labiatae)
American Germander - Link to Ontario Weeds: American Germander
American Germander 		Ground ivy - Link to Ontario Weeds: Ground Ivy
Ground ivy 		Catnip - Link to Ontario Weeds: Catnip
Catnip 		Heal-all - Link to Ontario Weeds: Heal-all
Heal-all
Hemp-nettle - Link to Ontario Weeds: Hemp-nettle
Hemp-nettle		 Henbit - Link to Ontario Weeds: Henbit
Henbit 		Motherwort - Link to Ontario Weeds: Motherwort
Motherwort 		Marsh hedge-nettle - Link to Ontario Weeds: Marsh Hedge-nettle
Marsh hedge-nettle
Nettle Family (Urticaceae)
Stinging nettle - Link to larger picture of Stinging Nettle
Stinging nettle
Nightshade or Potato Family (Solanaceae)
Smooth ground-cherry - Link to Ontario Weeds: Smooth Ground-cherry
Smooth ground-cherry 		Climbing nightshade - Link to Ontario Weeds: Climbing Nightshade
Climbing nightshade 		Eastern black nightshade - Link to Ontario Weeds: Eastern Black Nightshade
Eastern black nightshade		 Hairy nightshade - Link to Ontario Weeds: Hairy Nightshade
Hairy nightshade
Clammy ground cherry - Link to Ontario Weeds: Clammy Ground Cherry
Clammy ground cherry 		Horse nettle - Link to Ontario Weeds: Horse Nettle
Horse nettle		 Jimsonweed - Link to Ontario Weeds: Jimsonweed
Jimsonweed 		 
Figwort or Snapdragon Family (Scrophulariaceae)
Common mullein - Link to Ontario Weeds: Common Mullein
Common mullein 		Toadflax - Link to Ontario Weeds: Toadflax
Toadflax 		Dwarf snapdragon - Link to Ontario Weeds: Dwarf Snapdragon
Dwarf snapdragon 		Corn speedwell (Veronica) - Link to Ontario Weeds: Corn Speedwell
Corn speedwell (Veronica) 		Creeping speedwell - Link to Ontario Weeds: Creeping speedwell
Creeping speedwell
Purslane speedwell (Veronica) - Link to Ontario Weeds: Purslane Speedwell
Purslane speedwell (Veronica) 		Thyme-leaved speedwell (Veronica) - Link to Ontario Weeds: Thyme-leaved Speedwell - LInk to Ontario Weeds: Thyme-leaved speedwell
Thyme-leaved speedwell (Veronica)		 Bird's-eye speedwell - Link to Ontario Weeds: Bird's-eye speedwell
Bird's-eye speedwell		 Dalmatian toadflax - Link to Ontario Weeds: Dalmatian Toadflax
Dalmatian toadflax 		Creeping speedwell - Link to Ontario Weeds: Creeping speedwell
Field speedwell
Plantain Family (Plantaginaceae)
Broad-leaved plantain - Link to Ontario Weeds: Broad-leaved Plantain
Broad-leaved plantain		 Narrow-leaved plantain (Buckhorn plantain) - Link to Ontario Weeds: Narrow-leaved Plantain
Narrow-leaved plantain (Buckhorn plantain)
Madder Family (Rubiaceae)
Smooth bedstraw - Link to Ontario Weeds: Smooth Bedstraw
Smooth bedstraw 		Cleavers - Link to Ontario Weeds: Cleavers
Cleavers

Browse the Ontario Weeds Gallery: | 1 | 2 | 3 | 4 |

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For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca