Ontario Weeds

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 |


Related Links

 



For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
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